1032

codeforces/1032/.clang-format

@@ -0,0 +1,9 @@
+BasedOnStyle: Google
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortCompoundRequirementOnASingleLine: false
+AllowShortEnumsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: false
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLambdasOnASingleLine: false
+AllowShortLoopsOnASingleLine: false

codeforces/1032/.clangd

@@ -0,0 +1,39 @@
+CompileFlags:
+	Add:
+		-O2
+		-Wall
+		-Wextra
+		-Wpedantic
+		-Wshadow
+		-Wformat=2
+		-Wfloat-equal
+		-Wlogical-op
+		-Wshift-overflow=2
+		-Wnon-virtual-dtor
+		-Wold-style-cast
+		-Wcast-qual
+		-Wuseless-cast
+		-Wno-sign-promotion
+		-Wcast-align
+		-Wunused
+		-Woverloaded-virtual
+		-Wconversion
+		-Wsign-conversion
+		-Wmisleading-indentation
+		-Wduplicated-cond
+		-Wduplicated-branches
+		-Wlogical-op
+		-Wnull-dereference
+		-Wformat=2
+		-Wformat-overflow
+		-Wformat-truncation
+		-Wdouble-promotion
+		-Wundef
+		-DLOCAL
+		-Wno-unknown-pragmas
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23

codeforces/1032/a.cc

@@ -0,0 +1,89 @@
+#include <bits/stdc++.h>  // {{{
+
+// https://codeforces.com/blog/entry/96344
+
+#pragma GCC optimize("O2,unroll-loops")
+#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
+
+using namespace std;
+
+using i32 = int32_t;
+using u32 = uint32_t;
+using i64 = int64_t;
+using u64 = uint64_t;
+using f64 = double;
+using f128 = long double;
+
+#if __cplusplus >= 202002L
+template <typename T>
+constexpr T MIN = std::numeric_limits<T>::min();
+
+template <typename T>
+constexpr T MAX = std::numeric_limits<T>::max();
+
+template <typename T>
+[[nodiscard]] static T sc(auto&& x) {
+  return static_cast<T>(x);
+}
+
+template <typename T>
+[[nodiscard]] static T sz(auto&& x) {
+  return static_cast<T>(x.size());
+}
+#endif
+
+static void NO() {
+  std::cout << "NO\n";
+}
+
+static void YES() {
+  std::cout << "YES\n";
+}
+
+template <typename T>
+using vec = std::vector<T>;
+
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define ff first
+#define ss second
+
+#ifdef LOCAL
+#define db(...) std::print(__VA_ARGS__)
+#define dbln(...) std::println(__VA_ARGS__)
+#else
+#define db(...)
+#define dbln(...)
+#endif
+//  }}}
+
+void solve() {
+  i32 n, s;
+  cin >> n >> s;
+
+  vec<i32> a(n);
+  for (auto& e : a)
+    cin >> e;
+
+  i32 ans = a[n - 1] - a[0];
+
+  // NOTE: forgot abs
+  ans += min(abs(s - a[0]), abs(a[n - 1] - s));
+
+  println("{}", ans);
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+  cin.exceptions(cin.failbit);
+
+  u32 tc = 1;
+  cin >> tc;
+
+  for (u32 t = 0; t < tc; ++t) {
+    solve();
+  }
+
+  return 0;
+}
+// }}}

codeforces/1032/b.cc

@@ -0,0 +1,102 @@
+#include <bits/stdc++.h>  // {{{
+
+// https://codeforces.com/blog/entry/96344
+
+#pragma GCC optimize("O2,unroll-loops")
+#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
+
+using namespace std;
+
+using i32 = int32_t;
+using u32 = uint32_t;
+using i64 = int64_t;
+using u64 = uint64_t;
+using f64 = double;
+using f128 = long double;
+
+#if __cplusplus >= 202002L
+template <typename T>
+constexpr T MIN = std::numeric_limits<T>::min();
+
+template <typename T>
+constexpr T MAX = std::numeric_limits<T>::max();
+
+template <typename T>
+[[nodiscard]] static T sc(auto&& x) {
+  return static_cast<T>(x);
+}
+
+template <typename T>
+[[nodiscard]] static T sz(auto&& x) {
+  return static_cast<T>(x.size());
+}
+#endif
+
+static void NO() {
+  std::cout << "NO\n";
+}
+
+static void YES() {
+  std::cout << "YES\n";
+}
+
+template <typename T>
+using vec = std::vector<T>;
+
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define ff first
+#define ss second
+
+#ifdef LOCAL
+#define db(...) std::print(__VA_ARGS__)
+#define dbln(...) std::println(__VA_ARGS__)
+#else
+#define db(...)
+#define dbln(...)
+#endif
+//  }}}
+
+void solve() {
+  u32 n;
+  cin >> n;
+  string a;
+  cin >> a;
+
+  unordered_set<char> seen{{a[0]}};
+
+  for (u32 i = 1; i < n - 1; ++i) {
+    if (seen.contains(a[i])) {
+      YES();
+      return;
+    }
+    seen.insert(a[i]);
+  }
+
+  seen = {{a[n - 1]}};
+
+  for (i32 i = n - 2; i > 0; --i) {
+    if (seen.contains(a[i])) {
+      YES();
+      return;
+    }
+    seen.insert(a[i]);
+  }
+
+  NO();
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+  cin.exceptions(cin.failbit);
+
+  u32 tc = 1;
+  cin >> tc;
+
+  for (u32 t = 0; t < tc; ++t) {
+    solve();
+  }
+
+  return 0;
+}
+// }}}

codeforces/1032/c.cc

@@ -0,0 +1,119 @@
+#include <bits/stdc++.h>  // {{{
+
+// https://codeforces.com/blog/entry/96344
+
+#pragma GCC optimize("O2,unroll-loops")
+#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
+
+using namespace std;
+
+using i32 = int32_t;
+using u32 = uint32_t;
+using i64 = int64_t;
+using u64 = uint64_t;
+using f64 = double;
+using f128 = long double;
+
+#if __cplusplus >= 202002L
+template <typename T>
+constexpr T MIN = std::numeric_limits<T>::min();
+
+template <typename T>
+constexpr T MAX = std::numeric_limits<T>::max();
+
+template <typename T>
+[[nodiscard]] static T sc(auto&& x) {
+  return static_cast<T>(x);
+}
+
+template <typename T>
+[[nodiscard]] static T sz(auto&& x) {
+  return static_cast<T>(x.size());
+}
+#endif
+
+static void NO() {
+  std::cout << "NO\n";
+}
+
+static void YES() {
+  std::cout << "YES\n";
+}
+
+template <typename T>
+using vec = std::vector<T>;
+
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define ff first
+#define ss second
+
+#ifdef LOCAL
+#define db(...) std::print(__VA_ARGS__)
+#define dbln(...) std::println(__VA_ARGS__)
+#else
+#define db(...)
+#define dbln(...)
+#endif
+//  }}}
+
+void solve() {
+  u32 n, m;
+  cin >> n >> m;
+
+  vec<vec<u32>> grid(n, vec<u32>(m));
+  for (auto& row : grid)
+    for (auto& cell : row)
+      cin >> cell;
+
+  u32 M = 0;
+  for (auto& row : grid)
+    for (auto cell : row)
+      M = max(M, cell);
+
+  unordered_map<u32, u32> M_col, M_row;
+
+  u32 total_M = 0;
+
+  for (u32 i = 0; i < n; ++i) {
+    for (u32 j = 0; j < m; ++j) {
+      M_row[i] += grid[i][j] == M;
+      // NOTE: had typo here, `=` instead of `==`
+      total_M += grid[i][j] == M;
+    }
+  }
+
+  for (u32 j = 0; j < m; ++j) {
+    for (u32 i = 0; i < n; ++i) {
+      M_col[j] += grid[i][j] == M;
+    }
+  }
+
+  for (u32 i = 0; i < n; ++i) {
+    for (u32 j = 0; j < m; ++j) {
+      u32 M_count = M_row[i] + M_col[j] - (grid[i][j] == M);
+
+      if (M_count == total_M) {
+        println("{}", M - 1);
+        return;
+      }
+    }
+  }
+
+  println("{}", M);
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+  cin.exceptions(cin.failbit);
+
+  u32 tc = 1;
+  cin >> tc;
+
+  for (u32 t = 0; t < tc; ++t) {
+    solve();
+  }
+
+  return 0;
+}
+// }}}

codeforces/1032/compile_flags.txt

@@ -0,0 +1,31 @@
+-O2
+-Wall
+-Wextra
+-Wpedantic
+-Wshadow
+-Wformat=2
+-Wfloat-equal
+-Wlogical-op
+-Wshift-overflow=2
+-Wnon-virtual-dtor
+-Wold-style-cast
+-Wcast-qual
+-Wuseless-cast
+-Wno-sign-promotion
+-Wcast-align
+-Wunused
+-Woverloaded-virtual
+-Wconversion
+-Wmisleading-indentation
+-Wduplicated-cond
+-Wduplicated-branches
+-Wlogical-op
+-Wnull-dereference
+-Wformat=2
+-Wformat-overflow
+-Wformat-truncation
+-Wdouble-promotion
+-Wundef
+-DLOCAL
+-std=c++23
+-std=c++23

codeforces/1032/d.cc

@@ -0,0 +1,111 @@
+#include <bits/stdc++.h>  // {{{
+
+// https://codeforces.com/blog/entry/96344
+
+#pragma GCC optimize("O2,unroll-loops")
+#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
+
+using namespace std;
+
+using i32 = int32_t;
+using u32 = uint32_t;
+using i64 = int64_t;
+using u64 = uint64_t;
+using f64 = double;
+using f128 = long double;
+
+#if __cplusplus >= 202002L
+template <typename T>
+constexpr T MIN = std::numeric_limits<T>::min();
+
+template <typename T>
+constexpr T MAX = std::numeric_limits<T>::max();
+
+template <typename T>
+[[nodiscard]] static T sc(auto &&x) {
+  return static_cast<T>(x);
+}
+
+template <typename T>
+[[nodiscard]] static T sz(auto &&x) {
+  return static_cast<T>(x.size());
+}
+#endif
+
+static void NO() {
+  std::cout << "NO\n";
+}
+
+static void YES() {
+  std::cout << "YES\n";
+}
+
+template <typename T>
+using vec = std::vector<T>;
+
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define ff first
+#define ss second
+
+#ifdef LOCAL
+#define db(...) std::print(__VA_ARGS__)
+#define dbln(...) std::println(__VA_ARGS__)
+#else
+#define db(...)
+#define dbln(...)
+#endif
+//  }}}
+
+void solve() {
+  u32 n;
+  cin >> n;
+  vector<u32> a(n), b(n);
+  for (auto &e : a)
+    cin >> e;
+  for (auto &e : b)
+    cin >> e;
+  struct Op {
+    int t, i;
+  };
+  vector<Op> ops;
+  for (u32 i = 0; i < n; i++)
+    for (u32 j = 0; j + 1 < n - i; j++)
+      if (a[j] > a[j + 1]) {
+        swap(a[j], a[j + 1]);
+        ops.push_back({1, (int)j + 1});
+      }
+  for (u32 i = 0; i < n; i++)
+    for (u32 j = 0; j + 1 < n - i; j++)
+      if (b[j] > b[j + 1]) {
+        swap(b[j], b[j + 1]);
+        ops.push_back({2, (int)j + 1});
+      }
+  for (u32 i = 0; i < n; ++i) {
+    if (a[i] > b[i]) {
+      ops.push_back({3, (int)i + 1});
+    }
+  }
+
+  // NOTE: did not consider/investigate correctness of bubble sort + naive swap
+
+  println("{}", ops.size());
+  for (auto &op : ops) {
+    println("{} {}", op.t, op.i);
+  }
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+  cin.exceptions(cin.failbit);
+
+  u32 tc = 1;
+  cin >> tc;
+
+  for (u32 t = 0; t < tc; ++t) {
+    solve();
+  }
+
+  return 0;
+}
+// }}}

codeforces/1032/debug_flags.txt

@@ -0,0 +1,14 @@
+-g3
+-fsanitize=address,undefined
+-fsanitize=float-divide-by-zero
+-fsanitize=float-cast-overflow
+-fno-sanitize-recover=all
+-fstack-protector-all
+-fstack-usage
+-fno-omit-frame-pointer
+-fno-inline
+-ffunction-sections
+-D_GLIBCXX_DEBUG
+-D_GLIBCXX_DEBUG_PEDANTIC
+-DLOCAL
+-std=c++23

codeforces/1032/io/a.in

@@ -0,0 +1,25 @@
+12
+1 1
+1
+1 2
+1
+1 1
+2
+2 1
+2 3
+2 2
+1 3
+2 3
+1 2
+3 1
+1 2 3
+3 2
+1 3 4
+3 3
+1 2 3
+4 3
+1 2 3 10
+5 5
+1 2 3 6 7
+6 6
+1 2 3 9 10 11

codeforces/1032/io/a.out

@@ -0,0 +1,16 @@
+0
+1
+1
+2
+3
+2
+2
+4
+2
+11
+8
+15
+
+[code]: 0
+[time]: 2.58851 ms
+[debug]: false

codeforces/1032/io/b.in

@@ -0,0 +1,25 @@
+12
+3
+aaa
+3
+aba
+3
+aab
+4
+abca
+4
+abba
+4
+aabb
+5
+abaca
+5
+abcda
+5
+abcba
+6
+abcbbf
+6
+abcdaa
+3
+abb

codeforces/1032/io/b.out

@@ -0,0 +1,16 @@
+YES
+NO
+YES
+NO
+YES
+YES
+YES
+NO
+YES
+YES
+YES
+YES
+
+[code]: 0
+[time]: 2.75302 ms
+[debug]: false

codeforces/1032/io/c.in

@@ -0,0 +1,36 @@
+10
+1 1
+1
+1 2
+1 2
+2 1
+2
+1
+2 2
+4 2
+3 4
+3 4
+1 2 3 2
+3 2 1 3
+2 1 3 2
+4 3
+1 5 1
+3 1 3
+5 5 5
+3 5 1
+4 4
+1 3 3 2
+2 3 2 2
+1 2 2 1
+3 3 2 3
+2 2
+2 2
+1 2
+3 2
+1 2
+2 1
+1 2
+3 3
+2 1 1
+1 2 1
+1 1 2

codeforces/1032/io/c.out

@@ -0,0 +1,14 @@
+0
+1
+1
+3
+2
+4
+3
+1
+1
+2
+
+[code]: 0
+[time]: 2.58493 ms
+[debug]: false

codeforces/1032/io/d.in

@@ -0,0 +1,19 @@
+6
+1
+1
+2
+1
+2
+1
+2
+1 3
+4 2
+2
+1 4
+3 2
+3
+6 5 4
+3 2 1
+3
+5 3 4
+2 6 1

codeforces/1032/io/d.out

@@ -0,0 +1,29 @@
+0
+1
+3 1
+1
+2 1
+2
+2 1
+3 2
+9
+1 1
+1 2
+1 1
+2 1
+2 2
+2 1
+3 1
+3 2
+3 3
+6
+1 1
+1 2
+2 2
+2 1
+3 1
+3 2
+
+[code]: 0
+[time]: 2.55299 ms
+[debug]: false

codeforces/1032/io/e.in

@@ -0,0 +1,15 @@
+14
+1 1
+2 3
+4 6
+15 16
+17 19
+199 201
+899 999
+1990 2001
+6309 6409
+12345 12501
+19987 20093
+746814 747932
+900990999 900991010
+999999999 999999999

codeforces/1032/io/e.out

@@ -0,0 +1,18 @@
+1 2
+2 1
+5 0
+15 3
+18 2
+199 3
+899 5
+1990 4
+6309 7
+12445 6
+19987 5
+746824 7
+900990999 14
+999999999 18
+
+[code]: 0
+[time]: 2.56085 ms
+[debug]: false

codeforces/1032/makefile

@@ -0,0 +1,30 @@
+.PHONY: run debug clean setup init
+
+VERSION ?= 20
+
+SRC = $(word 2,$(MAKECMDGOALS))
+
+.SILENT:
+
+run:
+	sh scripts/run.sh $(SRC)
+
+debug:
+	sh scripts/debug.sh $(SRC)
+
+clean:
+	rm -rf build/*
+
+setup:
+	test -d build || mkdir -p build
+	test -d io || mkdir -p io
+	test -d scripts || mkdir -p scripts
+	test -f .clang-format || cp $(HOME)/.config/cp-template/.clang-format .
+	test -f compile_flags.txt || cp $(HOME)/.config/cp-template/compile_flags.txt . && echo -std=c++$(VERSION) >>compile_flags.txt
+	test -f .clangd || cp $(HOME)/.config/cp-template/.clangd . && echo -e "\t\t-std=c++$(VERSION)" >>.clangd
+
+init:
+	make setup
+
+%:
+	@:

codeforces/1032/scripts/debug.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+. ./scripts/utils.sh
+
+SRC="$1"
+BASE=$(basename "$SRC" .cc)
+INPUT="${BASE}.in"
+OUTPUT="${BASE}.out"
+DBG_BIN="${BASE}.debug"
+
+test -d build || mkdir -p build
+test -d io || mkdir -p io
+
+test -f "$INPUT" && test ! -f "io/$INPUT" && mv "$INPUT" "io/"
+test -f "$OUTPUT" && test ! -f "io/$OUTPUT" && mv "$OUTPUT" "io/"
+
+test -f "io/$INPUT" || touch "io/$INPUT"
+test -f "io/$OUTPUT" || touch "io/$OUTPUT"
+
+INPUT="io/$INPUT"
+OUTPUT="io/$OUTPUT"
+DBG_BIN="build/$DBG_BIN"
+
+compile_source "$SRC" "$DBG_BIN" "$OUTPUT" @debug_flags.txt
+CODE=$?
+test $CODE -gt 0 && exit $CODE
+
+execute_binary "$DBG_BIN" "$INPUT" "$OUTPUT" true
+exit $?

codeforces/1032/scripts/run.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+. ./scripts/utils.sh
+
+SRC="$1"
+BASE=$(basename "$SRC" .cc)
+INPUT="${BASE}.in"
+OUTPUT="${BASE}.out"
+RUN_BIN="${BASE}.run"
+
+test -d build || mkdir -p build
+test -d io || mkdir -p io
+
+test -f "$INPUT" && test ! -f "io/$INPUT" && mv "$INPUT" "io/"
+test -f "$OUTPUT" && test ! -f "io/$OUTPUT" && mv "$OUTPUT" "io/"
+
+test -f "io/$INPUT" || touch "io/$INPUT"
+test -f "io/$OUTPUT" || touch "io/$OUTPUT"
+
+INPUT="io/$INPUT"
+OUTPUT="io/$OUTPUT"
+RUN_BIN="build/$RUN_BIN"
+
+compile_source "$SRC" "$RUN_BIN" "$OUTPUT" ""
+CODE=$?
+test $CODE -gt 0 && exit $CODE
+
+execute_binary "$RUN_BIN" "$INPUT" "$OUTPUT"
+exit $?

codeforces/1032/scripts/utils.sh

@@ -0,0 +1,61 @@
+#!/bin/sh
+
+execute_binary() {
+  binary="$1"
+  input="$2"
+  output="$3"
+  is_debug="$4"
+
+  start=$(date '+%s.%N')
+  if [ -n "$is_debug" ]; then
+    asan="$(ldconfig -p | grep libasan.so | head -n1 | awk '{print $4}')"
+    LD_PRELOAD="$asan" timeout 2s ./"$binary" <"$input" >"$output" 2>&1
+  else
+    timeout 2s ./"$binary" <"$input" >"$output" 2>&1
+  fi
+  CODE=$?
+  end=$(date '+%s.%N')
+  truncate -s "$(head -n 1000 "$output" | wc -c)" "$output"
+
+  if [ $CODE -ge 124 ]; then
+    MSG=''
+    case $CODE in
+    124) MSG='TIMEOUT' ;;
+    128) MSG='SIGILL' ;;
+    130) MSG='SIGABRT' ;;
+    131) MSG='SIGBUS' ;;
+    136) MSG='SIGFPE' ;;
+    135) MSG='SIGSEGV' ;;
+    137) MSG='SIGPIPE' ;;
+    139) MSG='SIGTERM' ;;
+    esac
+    [ $CODE -ne 124 ] && sed -i '$d' "$output"
+    test -n "$MSG" && printf '\n[code]: %s (%s)' "$CODE" "$MSG" >>"$output"
+  else
+    printf '\n[code]: %s' "$CODE" >>"$output"
+  fi
+
+  printf '\n[time]: %s ms' "$(awk "BEGIN {print ($end - $start) * 1000}")" >>$output
+  test -n "$is_debug" && is_debug_string=true || is_debug_string=false
+  printf '\n[debug]: %s' "$is_debug_string" >>$output
+  return $CODE
+}
+
+compile_source() {
+  src="$1"
+  bin="$2"
+  output="$3"
+  flags="$4"
+
+  test -f "$bin" && rm "$bin" || true
+  g++ @compile_flags.txt $flags "$src" -o "$bin" 2>"$output"
+  CODE=$?
+
+  if [ $CODE -gt 0 ]; then
+    printf '\n[code]: %s' "$CODE" >>"$output"
+    return $CODE
+  else
+    echo '' >"$output"
+    return 0
+  fi
+}

codeforces/784/.clangd

@@ -45,3 +45,12 @@ CompileFlags:
 -e 		-std=c++23
 -e 		-std=c++23
 -e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23
+-e 		-std=c++23

codeforces/784/io/a.out

@@ -7,4 +7,5 @@ Division 2
 Division 1
 
 [code]: 0
-[time]: 5.79357 ms
+[time]: 20.0531 ms
+[debug]: true

codeforces/784/io/b.out

@@ -7,4 +7,4 @@
 4
 
 [code]: 0
-[time]: 2.40207 ms
+[time]: 2.40207 ms

codeforces/784/io/c.out

@@ -4,4 +4,4 @@ YES
 YES
 
 [code]: 0
-[time]: 6.10971 ms
+[time]: 6.10971 ms

codeforces/784/io/e.out

@@ -5,4 +5,4 @@
 
 [code]: 0
 [time]: 4.33087 ms
-[time]: 2.47264 ms
+[time]: 2.47264 ms

codeforces/784/io/f.out

@@ -4,4 +4,4 @@
 7
 
 [code]: 0
-[time]: 2.23374 ms
+[time]: 2.23374 ms

codeforces/784/io/g.out

@@ -16,4 +16,4 @@
 
 
 [code]: 0
-[time]: 2.32959 ms
+[time]: 2.32959 ms

codeforces/784/io/h.out

@@ -1,7 +1,4 @@
-2
-4
-2147483646
-1073741825
+==1344370==ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD.
 
-[code]: 0
-[time]: 3.09849 ms
+[code]: 1
+[time]: 3.08728 ms

codeforces/784/scripts/debug.sh

@@ -25,5 +25,5 @@ compile_source "$SRC" "$DBG_BIN" "$OUTPUT" @debug_flags.txt
 CODE=$?
 test $CODE -gt 0 && exit $CODE
 
-execute_binary "$DBG_BIN" "$INPUT" "$OUTPUT"
+execute_binary "$DBG_BIN" "$INPUT" "$OUTPUT" true
 exit $?

codeforces/784/scripts/utils.sh

@@ -4,9 +4,15 @@ execute_binary() {
   binary="$1"
   input="$2"
   output="$3"
+  is_debug="$4"
 
   start=$(date '+%s.%N')
-  timeout 2s ./"$binary" <"$input" >"$output" 2>&1
+  if [ -n "$is_debug" ]; then
+    asan="$(ldconfig -p | grep libasan.so | head -n1 | awk '{print $4}')"
+    LD_PRELOAD="$asan" timeout 2s ./"$binary" <"$input" >"$output" 2>&1
+  else
+    timeout 2s ./"$binary" <"$input" >"$output" 2>&1
+  fi
   CODE=$?
   end=$(date '+%s.%N')
   truncate -s "$(head -n 1000 "$output" | wc -c)" "$output"
@@ -30,6 +36,8 @@ execute_binary() {
   fi
 
   printf '\n[time]: %s ms' "$(awk "BEGIN {print ($end - $start) * 1000}")" >>$output
+  test -n "$is_debug" && is_debug_string=true || is_debug_string=false
+  printf '\n[debug]: %s' "$is_debug_string" >>$output
   return $CODE
 }
 

codeforces/874/.clangd

@@ -21,4 +21,4 @@ CompileFlags:
 		- -Wdouble-promotion
 		- -Wundef
 		- -DLOCAL
-		- -Wno-unknown-pragmas
+		- -Wno-unknown-pragmas-e 		-std=c++23

codeforces/874/compile_flags.txt

@@ -1,21 +1,31 @@
+-O2
 -Wall
 -Wextra
+-Wpedantic
 -Wshadow
+-Wformat=2
+-Wfloat-equal
+-Wlogical-op
+-Wshift-overflow=2
 -Wnon-virtual-dtor
 -Wold-style-cast
+-Wcast-qual
+-Wuseless-cast
+-Wno-sign-promotion
 -Wcast-align
 -Wunused
 -Woverloaded-virtual
--Wpedantic
+-Wconversion
 -Wmisleading-indentation
 -Wduplicated-cond
 -Wduplicated-branches
 -Wlogical-op
 -Wnull-dereference
--Wuseless-cast
 -Wformat=2
 -Wformat-overflow
 -Wformat-truncation
 -Wdouble-promotion
+-Wundef
 -DLOCAL
 -std=c++23
+-std=c++23

codeforces/874/debug_flags.txt

@@ -0,0 +1,14 @@
+-g3
+-fsanitize=address,undefined
+-fsanitize=float-divide-by-zero
+-fsanitize=float-cast-overflow
+-fno-sanitize-recover=all
+-fstack-protector-all
+-fstack-usage
+-fno-omit-frame-pointer
+-fno-inline
+-ffunction-sections
+-D_GLIBCXX_DEBUG
+-D_GLIBCXX_DEBUG_PEDANTIC
+-DLOCAL
+-std=c++23

codeforces/874/makefile

@@ -0,0 +1,30 @@
+.PHONY: run debug clean setup init
+
+VERSION ?= 20
+
+SRC = $(word 2,$(MAKECMDGOALS))
+
+.SILENT:
+
+run:
+	sh scripts/run.sh $(SRC)
+
+debug:
+	sh scripts/debug.sh $(SRC)
+
+clean:
+	rm -rf build/*
+
+setup:
+	test -d build || mkdir -p build
+	test -d io || mkdir -p io
+	test -d scripts || mkdir -p scripts
+	test -f .clang-format || cp $(HOME)/.config/cp-template/.clang-format .
+	test -f compile_flags.txt || cp $(HOME)/.config/cp-template/compile_flags.txt . && echo -std=c++$(VERSION) >>compile_flags.txt
+	test -f .clangd || cp $(HOME)/.config/cp-template/.clangd . && echo -e "\t\t-std=c++$(VERSION)" >>.clangd
+
+init:
+	make setup
+
+%:
+	@:

codeforces/874/scripts/debug.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+. ./scripts/utils.sh
+
+SRC="$1"
+BASE=$(basename "$SRC" .cc)
+INPUT="${BASE}.in"
+OUTPUT="${BASE}.out"
+DBG_BIN="${BASE}.debug"
+
+test -d build || mkdir -p build
+test -d io || mkdir -p io
+
+test -f "$INPUT" && test ! -f "io/$INPUT" && mv "$INPUT" "io/"
+test -f "$OUTPUT" && test ! -f "io/$OUTPUT" && mv "$OUTPUT" "io/"
+
+test -f "io/$INPUT" || touch "io/$INPUT"
+test -f "io/$OUTPUT" || touch "io/$OUTPUT"
+
+INPUT="io/$INPUT"
+OUTPUT="io/$OUTPUT"
+DBG_BIN="build/$DBG_BIN"
+
+compile_source "$SRC" "$DBG_BIN" "$OUTPUT" @debug_flags.txt
+CODE=$?
+test $CODE -gt 0 && exit $CODE
+
+execute_binary "$DBG_BIN" "$INPUT" "$OUTPUT"
+exit $?

codeforces/874/scripts/run.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+. ./scripts/utils.sh
+
+SRC="$1"
+BASE=$(basename "$SRC" .cc)
+INPUT="${BASE}.in"
+OUTPUT="${BASE}.out"
+RUN_BIN="${BASE}.run"
+
+test -d build || mkdir -p build
+test -d io || mkdir -p io
+
+test -f "$INPUT" && test ! -f "io/$INPUT" && mv "$INPUT" "io/"
+test -f "$OUTPUT" && test ! -f "io/$OUTPUT" && mv "$OUTPUT" "io/"
+
+test -f "io/$INPUT" || touch "io/$INPUT"
+test -f "io/$OUTPUT" || touch "io/$OUTPUT"
+
+INPUT="io/$INPUT"
+OUTPUT="io/$OUTPUT"
+RUN_BIN="build/$RUN_BIN"
+
+compile_source "$SRC" "$RUN_BIN" "$OUTPUT" ""
+CODE=$?
+test $CODE -gt 0 && exit $CODE
+
+execute_binary "$RUN_BIN" "$INPUT" "$OUTPUT"
+exit $?

codeforces/874/scripts/utils.sh

@@ -0,0 +1,53 @@
+#!/bin/sh
+
+execute_binary() {
+  binary="$1"
+  input="$2"
+  output="$3"
+
+  start=$(date '+%s.%N')
+  timeout 2s ./"$binary" <"$input" >"$output" 2>&1
+  CODE=$?
+  end=$(date '+%s.%N')
+  truncate -s "$(head -n 1000 "$output" | wc -c)" "$output"
+
+  if [ $CODE -ge 124 ]; then
+    MSG=''
+    case $CODE in
+    124) MSG='TIMEOUT' ;;
+    128) MSG='SIGILL' ;;
+    130) MSG='SIGABRT' ;;
+    131) MSG='SIGBUS' ;;
+    136) MSG='SIGFPE' ;;
+    135) MSG='SIGSEGV' ;;
+    137) MSG='SIGPIPE' ;;
+    139) MSG='SIGTERM' ;;
+    esac
+    [ $CODE -ne 124 ] && sed -i '$d' "$output"
+    test -n "$MSG" && printf '\n[code]: %s (%s)' "$CODE" "$MSG" >>"$output"
+  else
+    printf '\n[code]: %s' "$CODE" >>"$output"
+  fi
+
+  printf '\n[time]: %s ms' "$(awk "BEGIN {print ($end - $start) * 1000}")" >>$output
+  return $CODE
+}
+
+compile_source() {
+  src="$1"
+  bin="$2"
+  output="$3"
+  flags="$4"
+
+  test -f "$bin" && rm "$bin" || true
+  g++ @compile_flags.txt $flags "$src" -o "$bin" 2>"$output"
+  CODE=$?
+
+  if [ $CODE -gt 0 ]; then
+    printf '\n[code]: %s' "$CODE" >>"$output"
+    return $CODE
+  else
+    echo '' >"$output"
+    return 0
+  fi
+}