diff --git a/after/ftplugin/cpin.lua b/after/ftplugin/cpin.lua
new file mode 100644
index 0000000..76a9f86
--- /dev/null
+++ b/after/ftplugin/cpin.lua
@@ -0,0 +1,6 @@
+vim.opt_local.number = false
+vim.opt_local.relativenumber = false
+vim.opt_local.statuscolumn = ""
+vim.opt_local.signcolumn = "no"
+vim.opt_local.wrap = true
+vim.opt_local.linebreak = true
diff --git a/after/ftplugin/cpout.lua b/after/ftplugin/cpout.lua
new file mode 100644
index 0000000..3f0bcdc
--- /dev/null
+++ b/after/ftplugin/cpout.lua
@@ -0,0 +1,7 @@
+vim.opt_local.number = false
+vim.opt_local.relativenumber = false
+vim.opt_local.statuscolumn = ""
+vim.opt_local.signcolumn = "no"
+vim.opt_local.wrap = true
+vim.opt_local.linebreak = true
+vim.opt_local.modifiable = false
diff --git a/doc/cp.txt b/doc/cp.txt
index 7570cc1..306c70a 100644
--- a/doc/cp.txt
+++ b/doc/cp.txt
@@ -9,12 +9,13 @@ cp.nvim is a competitive programming plugin that automates problem setup,
 compilation, and testing workflow for online judges.
 
 Supported platforms: AtCoder, Codeforces, CSES
+Supported languages: C++, Python
 
 REQUIREMENTS						*cp-requirements*
 
 - Neovim 0.10.0+
 - uv package manager (https://docs.astral.sh/uv/)
-- C++ compiler (g++/clang++)
+- Language runtime/compiler (g++, python3)
 
 Optional:
 - LuaSnip for template expansion (https://github.com/L3MON4D3/LuaSnip)
diff --git a/ftdetect/cp.lua b/ftdetect/cp.lua
new file mode 100644
index 0000000..2b6b593
--- /dev/null
+++ b/ftdetect/cp.lua
@@ -0,0 +1,6 @@
+vim.filetype.add({
+	extension = {
+		cpin = "cpin",
+		cpout = "cpout",
+	},
+})
diff --git a/lua/cp/cache.lua b/lua/cp/cache.lua
index 70a55c3..565afc4 100644
--- a/lua/cp/cache.lua
+++ b/lua/cp/cache.lua
@@ -87,4 +87,26 @@ function M.clear_contest_data(platform, contest_id)
 	end
 end
 
+function M.get_test_cases(platform, contest_id, problem_id)
+	local problem_key = problem_id and (contest_id .. "_" .. problem_id) or contest_id
+	if not cache_data[platform] or not cache_data[platform][problem_key] then
+		return nil
+	end
+	return cache_data[platform][problem_key].test_cases
+end
+
+function M.set_test_cases(platform, contest_id, problem_id, test_cases)
+	local problem_key = problem_id and (contest_id .. "_" .. problem_id) or contest_id
+	if not cache_data[platform] then
+		cache_data[platform] = {}
+	end
+	if not cache_data[platform][problem_key] then
+		cache_data[platform][problem_key] = {}
+	end
+
+	cache_data[platform][problem_key].test_cases = test_cases
+	cache_data[platform][problem_key].test_cases_cached_at = os.time()
+	M.save()
+end
+
 return M
diff --git a/lua/cp/config.lua b/lua/cp/config.lua
index 9f39c60..48a245e 100644
--- a/lua/cp/config.lua
+++ b/lua/cp/config.lua
@@ -12,19 +12,48 @@ local M = {}
 M.defaults = {
 	contests = {
 		default = {
-			cpp_version = 20,
-			compile_flags = { "-O2", "-DLOCAL", "-Wall", "-Wextra" },
-			debug_flags = { "-g3", "-fsanitize=address,undefined", "-DLOCAL" },
+			cpp = {
+				compile = {
+					"g++",
+					"-std=c++{version}",
+					"-O2",
+					"-DLOCAL",
+					"-Wall",
+					"-Wextra",
+					"{source}",
+					"-o",
+					"{binary}",
+				},
+				run = { "{binary}" },
+				debug = {
+					"g++",
+					"-std=c++{version}",
+					"-g3",
+					"-fsanitize=address,undefined",
+					"-DLOCAL",
+					"{source}",
+					"-o",
+					"{binary}",
+				},
+				executable = nil,
+				version = 20,
+			},
+			python = {
+				compile = nil,
+				run = { "{source}" },
+				debug = { "{source}" },
+				executable = "python3",
+			},
 			timeout_ms = 2000,
 		},
 		atcoder = {
-			cpp_version = 23,
+			cpp = { version = 23 },
 		},
 		codeforces = {
-			cpp_version = 23,
+			cpp = { version = 23 },
 		},
 		cses = {
-			cpp_version = 20,
+			cpp = { version = 20 },
 		},
 	},
 	snippets = {},
@@ -42,11 +71,6 @@ M.defaults = {
 ---@return table
 local function extend_contest_config(base_config, contest_config)
 	local result = vim.tbl_deep_extend("force", base_config, contest_config)
-
-	local std_flag = ("-std=c++%d"):format(result.cpp_version)
-	result.compile_flags = vim.list_extend({ std_flag }, result.compile_flags)
-	result.debug_flags = vim.list_extend({ std_flag }, result.debug_flags)
-
 	return result
 end
 
diff --git a/lua/cp/execute.lua b/lua/cp/execute.lua
index 774346b..00e9332 100644
--- a/lua/cp/execute.lua
+++ b/lua/cp/execute.lua
@@ -1,4 +1,41 @@
 local M = {}
+local logger = require("cp.log")
+
+local filetype_to_language = {
+	cpp = "cpp",
+	cxx = "cpp",
+	cc = "cpp",
+	c = "cpp",
+	py = "python",
+	py3 = "python",
+}
+
+local function get_language_from_file(source_file)
+	local extension = vim.fn.fnamemodify(source_file, ":e")
+	local language = filetype_to_language[extension] or "cpp"
+	logger.log(("detected language: %s (extension: %s)"):format(language, extension))
+	return language
+end
+
+local function substitute_template(cmd_template, substitutions)
+	local result = {}
+	for _, arg in ipairs(cmd_template) do
+		local substituted = arg
+		for key, value in pairs(substitutions) do
+			substituted = substituted:gsub("{" .. key .. "}", value)
+		end
+		table.insert(result, substituted)
+	end
+	return result
+end
+
+local function build_command(cmd_template, executable, substitutions)
+	local cmd = substitute_template(cmd_template, substitutions)
+	if executable then
+		table.insert(cmd, 1, executable)
+	end
+	return cmd
+end
 
 local signal_codes = {
 	[128] = "SIGILL",
@@ -22,15 +59,34 @@ local function ensure_directories()
 	vim.system({ "mkdir", "-p", "build", "io" }):wait()
 end
 
-local function compile_cpp(source_path, binary_path, flags)
-	local compile_cmd = { "g++", unpack(flags), source_path, "-o", binary_path }
-	return vim.system(compile_cmd, { text = true }):wait()
+local function compile_generic(language_config, substitutions)
+	if not language_config.compile then
+		logger.log("no compilation step required")
+		return { code = 0, stderr = "" }
+	end
+
+	local compile_cmd = substitute_template(language_config.compile, substitutions)
+	logger.log(("compiling: %s"):format(table.concat(compile_cmd, " ")))
+
+	local start_time = vim.loop.hrtime()
+	local result = vim.system(compile_cmd, { text = true }):wait()
+	local compile_time = (vim.loop.hrtime() - start_time) / 1000000
+
+	if result.code == 0 then
+		logger.log(("compilation successful (%.1fms)"):format(compile_time))
+	else
+		logger.log(("compilation failed (%.1fms): %s"):format(compile_time, result.stderr), vim.log.levels.WARN)
+	end
+
+	return result
 end
 
-local function execute_binary(binary_path, input_data, timeout_ms)
+local function execute_command(cmd, input_data, timeout_ms)
+	logger.log(("executing: %s"):format(table.concat(cmd, " ")))
+
 	local start_time = vim.loop.hrtime()
 
-	local result = vim.system({ binary_path }, {
+	local result = vim.system(cmd, {
 		stdin = input_data,
 		timeout = timeout_ms,
 		text = true,
@@ -41,6 +97,14 @@ local function execute_binary(binary_path, input_data, timeout_ms)
 
 	local actual_code = result.code or 0
 
+	if result.code == 124 then
+		logger.log(("execution timed out after %.1fms"):format(execution_time), vim.log.levels.WARN)
+	elseif actual_code ~= 0 then
+		logger.log(("execution failed (exit code %d, %.1fms)"):format(actual_code, execution_time), vim.log.levels.WARN)
+	else
+		logger.log(("execution successful (%.1fms)"):format(execution_time))
+	end
+
 	return {
 		stdout = result.stdout or "",
 		stderr = result.stderr or "",
@@ -96,20 +160,36 @@ end
 function M.run_problem(ctx, contest_config, is_debug)
 	ensure_directories()
 
-	local flags = is_debug and contest_config.debug_flags or contest_config.compile_flags
+	local language = get_language_from_file(ctx.source_file)
+	local language_config = contest_config[language]
 
-	local compile_result = compile_cpp(ctx.source_file, ctx.binary_file, flags)
-	if compile_result.code ~= 0 then
-		vim.fn.writefile({ compile_result.stderr }, ctx.output_file)
+	if not language_config then
+		vim.fn.writefile({ "Error: No configuration for language: " .. language }, ctx.output_file)
 		return
 	end
 
+	local substitutions = {
+		source = ctx.source_file,
+		binary = ctx.binary_file,
+		version = tostring(language_config.version or ""),
+	}
+
+	local compile_cmd = is_debug and language_config.debug or language_config.compile
+	if compile_cmd then
+		local compile_result = compile_generic(language_config, substitutions)
+		if compile_result.code ~= 0 then
+			vim.fn.writefile({ compile_result.stderr }, ctx.output_file)
+			return
+		end
+	end
+
 	local input_data = ""
 	if vim.fn.filereadable(ctx.input_file) == 1 then
 		input_data = table.concat(vim.fn.readfile(ctx.input_file), "\n") .. "\n"
 	end
 
-	local exec_result = execute_binary(ctx.binary_file, input_data, contest_config.timeout_ms)
+	local run_cmd = build_command(language_config.run, language_config.executable, substitutions)
+	local exec_result = execute_command(run_cmd, input_data, contest_config.timeout_ms)
 	local formatted_output = format_output(exec_result, ctx.expected_file, is_debug)
 
 	local output_buf = vim.fn.bufnr(ctx.output_file)
diff --git a/lua/cp/health.lua b/lua/cp/health.lua
index d902934..738e9e2 100644
--- a/lua/cp/health.lua
+++ b/lua/cp/health.lua
@@ -62,12 +62,14 @@ end
 local function check_config()
 	vim.health.ok("Plugin ready")
 
-	if vim.g.cp and vim.g.cp.platform then
-		local info = vim.g.cp.platform
-		if vim.g.cp.contest_id then
-			info = info .. " " .. vim.g.cp.contest_id
-			if vim.g.cp.problem_id then
-				info = info .. " " .. vim.g.cp.problem_id
+	local cp = require("cp")
+	local context = cp.get_current_context()
+	if context.platform then
+		local info = context.platform
+		if context.contest_id then
+			info = info .. " " .. context.contest_id
+			if context.problem_id then
+				info = info .. " " .. context.problem_id
 			end
 		end
 		vim.health.info("Current context: " .. info)
diff --git a/lua/cp/init.lua b/lua/cp/init.lua
index b86dc98..01a046a 100644
--- a/lua/cp/init.lua
+++ b/lua/cp/init.lua
@@ -14,7 +14,6 @@ if not vim.fn.has("nvim-0.10.0") then
 	return {}
 end
 
-vim.g.cp = vim.g.cp or {}
 local user_config = {}
 local config = config_module.setup(user_config)
 logger.set_config(config)
@@ -28,6 +27,8 @@ local state = {
 	saved_layout = nil,
 	saved_session = nil,
 	temp_output = nil,
+	test_cases = nil,
+	test_states = {},
 }
 
 local platforms = { "atcoder", "codeforces", "cses" }
@@ -53,6 +54,9 @@ local function setup_problem(contest_id, problem_id)
 		return
 	end
 
+	local problem_name = state.platform == "cses" and contest_id or (contest_id .. (problem_id or ""))
+	logger.log(("setting up problem: %s"):format(problem_name))
+
 	local metadata_result = scrape.scrape_contest_metadata(state.platform, contest_id)
 	if not metadata_result.success then
 		logger.log(
@@ -79,6 +83,11 @@ local function setup_problem(contest_id, problem_id)
 	state.contest_id = contest_id
 	state.problem_id = problem_id
 
+	local cached_test_cases = cache.get_test_cases(state.platform, contest_id, problem_id)
+	if cached_test_cases then
+		state.test_cases = cached_test_cases
+	end
+
 	local ctx = problem.create_context(state.platform, contest_id, problem_id, config)
 
 	local scrape_result = scrape.scrape_problem(ctx)
@@ -86,9 +95,15 @@ local function setup_problem(contest_id, problem_id)
 	if not scrape_result.success then
 		logger.log("scraping failed: " .. (scrape_result.error or "unknown error"), vim.log.levels.WARN)
 		logger.log("you can manually add test cases to io/ directory", vim.log.levels.INFO)
+		state.test_cases = nil
 	else
 		local test_count = scrape_result.test_count or 0
 		logger.log(("scraped %d test case(s) for %s"):format(test_count, scrape_result.problem_id))
+		state.test_cases = scrape_result.test_cases
+
+		if scrape_result.test_cases then
+			cache.set_test_cases(state.platform, contest_id, problem_id, scrape_result.test_cases)
+		end
 	end
 
 	vim.cmd.e(ctx.source_file)
@@ -144,6 +159,8 @@ local function run_problem()
 		return
 	end
 
+	logger.log(("running problem: %s"):format(problem_id))
+
 	if config.hooks and config.hooks.before_run then
 		config.hooks.before_run(problem_id)
 	end
@@ -188,34 +205,44 @@ end
 
 local function diff_problem()
 	if state.diff_mode then
-		local tile_fn = config.tile or window.default_tile
-		window.restore_layout(state.saved_layout, tile_fn)
+		vim.cmd.diffoff()
+		if state.saved_session then
+			vim.fn.delete(state.saved_session)
+			state.saved_session = nil
+		end
+		if state.temp_output then
+			vim.fn.delete(state.temp_output)
+			state.temp_output = nil
+		end
 		state.diff_mode = false
-		state.saved_layout = nil
-		logger.log("exited diff mode")
-	else
-		local problem_id = get_current_problem()
-		if not problem_id then
-			return
-		end
-
-		local ctx = problem.create_context(state.platform, state.contest_id, state.problem_id, config)
-
-		if vim.fn.filereadable(ctx.expected_file) == 0 then
-			logger.log(("No expected output file found: %s"):format(ctx.expected_file), vim.log.levels.ERROR)
-			return
-		end
-
-		state.saved_layout = window.save_layout()
-
-		local result = vim.system({ "awk", "/^\\[[^]]*\\]:/ {exit} {print}", ctx.output_file }, { text = true }):wait()
-		local actual_output = result.stdout
-
-		window.setup_diff_layout(actual_output, ctx.expected_file, ctx.input_file)
-
-		state.diff_mode = true
-		logger.log("entered diff mode")
+		return
 	end
+
+	local problem_id = get_current_problem()
+	if not problem_id then
+		return
+	end
+
+	local ctx = problem.create_context(state.platform, state.contest_id, state.problem_id, config)
+
+	if vim.fn.filereadable(ctx.expected_file) == 0 then
+		logger.log("no expected output file found", vim.log.levels.WARN)
+		return
+	end
+
+	if vim.fn.filereadable(ctx.output_file) == 0 then
+		logger.log("no output file found. run the problem first", vim.log.levels.WARN)
+		return
+	end
+
+	state.saved_session = vim.fn.tempname()
+	vim.cmd(("mksession! %s"):format(state.saved_session))
+
+	vim.cmd("silent only")
+	vim.cmd(("edit %s"):format(ctx.expected_file))
+	vim.cmd.diffthis()
+	vim.cmd(("vertical diffsplit %s"):format(ctx.output_file))
+	state.diff_mode = true
 end
 
 ---@param delta number 1 for next, -1 for prev
@@ -411,6 +438,14 @@ function M.setup(opts)
 	end
 end
 
+function M.get_current_context()
+	return {
+		platform = state.platform,
+		contest_id = state.contest_id,
+		problem_id = state.problem_id,
+	}
+end
+
 function M.is_initialized()
 	return true
 end
diff --git a/lua/cp/problem.lua b/lua/cp/problem.lua
index 4aa73d2..60406fd 100644
--- a/lua/cp/problem.lua
+++ b/lua/cp/problem.lua
@@ -27,8 +27,8 @@ function M.create_context(contest, contest_id, problem_id, config)
 		problem_id = problem_id,
 		source_file = source_file,
 		binary_file = ("build/%s.run"):format(base_name),
-		input_file = ("io/%s.in"):format(base_name),
-		output_file = ("io/%s.out"):format(base_name),
+		input_file = ("io/%s.cpin"):format(base_name),
+		output_file = ("io/%s.cpout"):format(base_name),
 		expected_file = ("io/%s.expected"):format(base_name),
 		problem_name = base_name,
 	}
diff --git a/lua/cp/scrape.lua b/lua/cp/scrape.lua
index 82e2e4f..bde861a 100644
--- a/lua/cp/scrape.lua
+++ b/lua/cp/scrape.lua
@@ -74,9 +74,9 @@ function M.scrape_contest_metadata(platform, contest_id)
 
 	local args
 	if platform == "cses" then
-		args = { "uv", "run", scraper_path, "metadata" }
+		args = { "uv", "run", "--directory", plugin_path, scraper_path, "metadata" }
 	else
-		args = { "uv", "run", scraper_path, "metadata", contest_id }
+		args = { "uv", "run", "--directory", plugin_path, scraper_path, "metadata", contest_id }
 	end
 
 	local result = vim.system(args, {
@@ -119,7 +119,7 @@ function M.scrape_contest_metadata(platform, contest_id)
 end
 
 ---@param ctx ProblemContext
----@return {success: boolean, problem_id: string, test_count?: number, url?: string, error?: string}
+---@return {success: boolean, problem_id: string, test_count?: number, test_cases?: table[], url?: string, error?: string}
 function M.scrape_problem(ctx)
 	ensure_io_directory()
 
@@ -152,9 +152,9 @@ function M.scrape_problem(ctx)
 
 	local args
 	if ctx.contest == "cses" then
-		args = { "uv", "run", scraper_path, "tests", ctx.contest_id }
+		args = { "uv", "run", "--directory", plugin_path, scraper_path, "tests", ctx.contest_id }
 	else
-		args = { "uv", "run", scraper_path, "tests", ctx.contest_id, ctx.problem_id }
+		args = { "uv", "run", "--directory", plugin_path, scraper_path, "tests", ctx.contest_id, ctx.problem_id }
 	end
 
 	local result = vim.system(args, {
@@ -185,30 +185,18 @@ function M.scrape_problem(ctx)
 	end
 
 	if data.test_cases and #data.test_cases > 0 then
-		local all_inputs = {}
-		local all_outputs = {}
+		local combined_input = data.test_cases[1].input:gsub("\r", "")
+		local combined_output = data.test_cases[1].output:gsub("\r", "")
 
-		for _, test_case in ipairs(data.test_cases) do
-			local input_lines = vim.split(test_case.input:gsub("\r", ""):gsub("\n+$", ""), "\n")
-			local output_lines = vim.split(test_case.output:gsub("\r", ""):gsub("\n+$", ""), "\n")
-
-			for _, line in ipairs(input_lines) do
-				table.insert(all_inputs, line)
-			end
-
-			for _, line in ipairs(output_lines) do
-				table.insert(all_outputs, line)
-			end
-		end
-
-		vim.fn.writefile(all_inputs, ctx.input_file)
-		vim.fn.writefile(all_outputs, ctx.expected_file)
+		vim.fn.writefile(vim.split(combined_input, "\n", true), ctx.input_file)
+		vim.fn.writefile(vim.split(combined_output, "\n", true), ctx.expected_file)
 	end
 
 	return {
 		success = true,
 		problem_id = ctx.problem_name,
 		test_count = data.test_cases and #data.test_cases or 0,
+		test_cases = data.test_cases,
 		url = data.url,
 	}
 end
diff --git a/plugin/cp.lua b/plugin/cp.lua
index 690823a..83a2816 100644
--- a/plugin/cp.lua
+++ b/plugin/cp.lua
@@ -22,10 +22,12 @@ end, {
 			local candidates = {}
 			vim.list_extend(candidates, platforms)
 			vim.list_extend(candidates, actions)
-			if vim.g.cp and vim.g.cp.platform and vim.g.cp.contest_id then
+			local cp = require("cp")
+			local context = cp.get_current_context()
+			if context.platform and context.contest_id then
 				local cache = require("cp.cache")
 				cache.load()
-				local contest_data = cache.get_contest_data(vim.g.cp.platform, vim.g.cp.contest_id)
+				local contest_data = cache.get_contest_data(context.platform, context.contest_id)
 				if contest_data and contest_data.problems then
 					for _, problem in ipairs(contest_data.problems) do
 						table.insert(candidates, problem.id)
diff --git a/readme.md b/readme.md
index f6b43ed..8cafc5e 100644
--- a/readme.md
+++ b/readme.md
@@ -9,9 +9,10 @@ https://private-user-images.githubusercontent.com/62671086/489116291-391976d1-c2
 ## Features
 
 - Support for multiple online judges ([AtCoder](https://atcoder.jp/), [Codeforces](https://codeforces.com/), [CSES](https://cses.fi))
+- Multi-language support (C++, Python)
 - Automatic problem scraping and test case management
 - Integrated build, run, and debug commands
-- Diff mode for comparing output with expected results
+- Enhanced test viewer with individual test case management
 - LuaSnip integration for contest-specific snippets
 
 ## Requirements
@@ -56,9 +57,14 @@ follows:
 4. Submit the problem (on the remote!)
 
 
+## Similar Projects
+
+- [competitest.nvim](https://github.com/xeluxee/competitest.nvim)
+
 ## TODO
 
 - finer-tuned problem limits (i.e. per-problem codeforces time, memory)
 - better highlighting
 - test case management
 - USACO support
+- new video with functionality, notify discord members
diff --git a/scrapers/codeforces.py b/scrapers/codeforces.py
index 6343287..4610ae9 100644
--- a/scrapers/codeforces.py
+++ b/scrapers/codeforces.py
@@ -19,28 +19,35 @@ def scrape(url: str) -> list[tuple[str, str]]:
         input_sections = soup.find_all("div", class_="input")
         output_sections = soup.find_all("div", class_="output")
 
-        for inp_section, out_section in zip(input_sections, output_sections):
+        all_inputs = []
+        all_outputs = []
+
+        for inp_section in input_sections:
             inp_pre = inp_section.find("pre")
+            if inp_pre:
+                divs = inp_pre.find_all("div")
+                if divs:
+                    lines = [div.get_text().strip() for div in divs]
+                    text = "\n".join(lines)
+                else:
+                    text = inp_pre.get_text().replace("\r", "")
+                all_inputs.append(text)
+
+        for out_section in output_sections:
             out_pre = out_section.find("pre")
+            if out_pre:
+                divs = out_pre.find_all("div")
+                if divs:
+                    lines = [div.get_text().strip() for div in divs]
+                    text = "\n".join(lines)
+                else:
+                    text = out_pre.get_text().replace("\r", "")
+                all_outputs.append(text)
 
-            if inp_pre and out_pre:
-                input_lines: list[str] = []
-                output_lines: list[str] = []
-
-                input_text_raw = inp_pre.get_text().strip().replace("\r", "")
-                input_lines = [
-                    line.strip() for line in input_text_raw.split("\n") if line.strip()
-                ]
-
-                output_text_raw = out_pre.get_text().strip().replace("\r", "")
-                output_lines = [
-                    line.strip() for line in output_text_raw.split("\n") if line.strip()
-                ]
-
-                if input_lines and output_lines:
-                    input_text = "\n".join(input_lines)
-                    output_text = "\n".join(output_lines)
-                    tests.append((input_text, output_text))
+        if all_inputs and all_outputs:
+            combined_input = "\n".join(all_inputs)
+            combined_output = "\n".join(all_outputs)
+            tests.append((combined_input, combined_output))
 
         return tests
 
@@ -112,7 +119,7 @@ def main() -> None:
 
     if mode == "metadata":
         if len(sys.argv) != 3:
-            result = {
+            result: dict[str, str | bool] = {
                 "success": False,
                 "error": "Usage: codeforces.py metadata <contest_id>",
             }
@@ -123,14 +130,14 @@ def main() -> None:
         problems: list[dict[str, str]] = scrape_contest_problems(contest_id)
 
         if not problems:
-            result = {
+            result: dict[str, str | bool] = {
                 "success": False,
                 "error": f"No problems found for contest {contest_id}",
             }
             print(json.dumps(result))
             sys.exit(1)
 
-        result = {
+        result: dict[str, str | bool | list] = {
             "success": True,
             "contest_id": contest_id,
             "problems": problems,
@@ -139,7 +146,7 @@ def main() -> None:
 
     elif mode == "tests":
         if len(sys.argv) != 4:
-            result = {
+            result: dict[str, str | bool] = {
                 "success": False,
                 "error": "Usage: codeforces.py tests <contest_id> <problem_letter>",
             }
@@ -154,7 +161,7 @@ def main() -> None:
         tests: list[tuple[str, str]] = scrape_sample_tests(url)
 
         if not tests:
-            result = {
+            result: dict[str, str | bool] = {
                 "success": False,
                 "error": f"No tests found for {contest_id} {problem_letter}",
                 "problem_id": problem_id,
@@ -167,7 +174,7 @@ def main() -> None:
         for input_data, output_data in tests:
             test_cases.append({"input": input_data, "output": output_data})
 
-        result = {
+        result: dict[str, str | bool | list] = {
             "success": True,
             "problem_id": problem_id,
             "url": url,
@@ -176,7 +183,7 @@ def main() -> None:
         print(json.dumps(result))
 
     else:
-        result = {
+        result: dict[str, str | bool] = {
             "success": False,
             "error": f"Unknown mode: {mode}. Use 'metadata' or 'tests'",
         }