99 lines
8.7 KiB
JSON
99 lines
8.7 KiB
JSON
{
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"category_name": "main",
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"contest_code": "START209D",
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"contest_name": "Starters 209 (Rated)",
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"status": "success",
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"submit_error": "You need to login to submit.",
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"is_verified": false,
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"problem_code": "P1209",
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"contest_category": "9",
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"problem_name": "Bitcoin Market",
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"intended_contest_code": "START209",
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"body": "This is an example problem statement in markdown, and a mini guide on writing statements. Please make sure to remove everything here before publishing your problem.\n\n- Codechef uses markdown for its problem statements. Markdown syntax can be found [here](https:\/\/github.com\/showdownjs\/showdown\/wiki\/Showdown's-Markdown-syntax). Note the `[text](link)` syntax to insert a hyperlink.\n- Codechef also uses $\\LaTeX$ to render mathematical expressions, and you are advised to make liberal use of it to make your statement look good.\n- Text can be made **bold** or *italicized*.\n- **Do not** use HTML tags (p, ul, li, pre, br, ...) in the statement.\n- To insert an image, first upload it to an online hosting service (for an official contest, ask a Codechef admin to do this for you \u2014 this is important) and then use the following syntax: ``.\n- If your problem doesn't contain subtasks, ensure that the Subtasks section below is disabled and **all content is deleted from it**.\n\nIf you face any issues, either contact a Codechef admin directly or send us an email at help@codechef.com.\n\nBelow is an example problem statement that uses some of the above-mentioned features.\n\n---------\n\nChef has a simple undirected graph $G$ with $N$ vertices and $M$ edges. A [subgraph](https:\/\/mathworld.wolfram.com\/Subgraph.html) $H$ of $G$ is called *good* if:\n- $H$ is connected\n- $H$ contains all $N$ vertices of $G$\n- There is a unique path between any two vertices in $H$, using only edges in $H$\n\nCount the number of *good* subgraphs of $G$. Since this number might be large, report it modulo $10^9 + 7$.\n\nIn other news, here's a completely unrelated image:\n\n.\n\n\n<aside style='background: #f8f8f8;padding: 10px 15px;'><div>All submissions for this problem are available.<\/div><\/aside>",
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"problemComponents": {
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"constraints": "- $1 \\leq R \\leq 10$",
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"constraintsState": true,
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"subtasks": "- **Subtask 1 (10 points):** $1 \\leq M \\leq 10$\n- **Subtask 2 (20 points):** The sum of $N$ across all test cases won't exceed $20$.\n- **Subtask 3 (70 points):** No further constraints.",
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"subtasksState": false,
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"statement": "Chef has recently started investing in **Bitcoin**. \nHe assigns a **market risk level** $R$ (from $1$ to $10$), where: \n\n- $1$ means the market is *very safe*, \n- $10$ means the market is *very risky*. \n\nChef will **buy Bitcoin** only if the risk level is **$4$ or less**. \n\nGiven the current risk level $R$, determine whether Chef should buy Bitcoin.\n\nPrint **\"YES\"** if Chef should buy, otherwise print **\"NO\"**.",
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"inputFormat": "- The first and only line of input contains a single integer $R$ \u2014 the current market risk level.",
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"inputFormatState": true,
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"outputFormat": "Print `YES` if Chef should buy Bitcoin, Otherwise, print `NO`.\n\nYou may print each character of the string in uppercase or lowercase (for example, the strings `YES`, `yEs`, `yes`, and `yeS` will all be treated as identical).\n",
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"outputFormatState": true,
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"sampleTestCases": [
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{
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"id": "1",
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"input": "2",
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"output": "YES",
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"explanation": "The current market risk is $2$. \nSince $2$ is not larger than $4$, the risk is small enough, and Chef will buy Bitcoin.",
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"isDeleted": false
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},
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{
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"id": "2",
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"input": "4",
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"output": "YES",
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"explanation": "The current market risk is $4$. \nSince $4$ is not larger than $4$, the risk is small enough, and Chef will buy Bitcoin.",
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"isDeleted": false
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},
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{
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"id": "3",
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"input": "5",
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"output": "NO",
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"explanation": "The current market risk is $5$. \nSince $5$ is larger than $4$, the risk is too much, and Chef will **not** buy Bitcoin.",
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"isDeleted": false
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}
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]
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},
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"gumlet_video_url": "",
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"video_editorial_url": "https:\/\/youtu.be\/tjUCV9Ld1Kw?si=minop9943wecj1bh",
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"text_editorial_body": "<h1><a name=\"problem-link-1\" class=\"anchor\" href=\"#problem-link-1\"><\/a>PROBLEM LINK:<\/h1>\n<p><a href=\"https:\/\/www.codechef.com\/problems\/P1209\">Practice<\/a><br>\n<a href=\"https:\/\/www.codechef.com\/START209A\/problems\/P1209\">Contest: Division 1<\/a><br>\n<a href=\"https:\/\/www.codechef.com\/START209B\/problems\/P1209\">Contest: Division 2<\/a><br>\n<a href=\"https:\/\/www.codechef.com\/START209C\/problems\/P1209\">Contest: Division 3<\/a><br>\n<a href=\"https:\/\/www.codechef.com\/START209D\/problems\/P1209\">Contest: Division 4<\/a><\/p>\n<p><em><strong>Author:<\/strong><\/em> <a href=\"https:\/\/www.codechef.com\/users\/pols_agyi_pols\">pols_agyi_pols<\/a><br>\n<em><strong>Tester:<\/strong><\/em> <a href=\"https:\/\/www.codechef.com\/users\/kingmessi\">kingmessi<\/a><br>\n<em><strong>Editorialist:<\/strong><\/em> <a href=\"https:\/\/www.codechef.com\/users\/iceknight1093\">iceknight1093<\/a><\/p>\n<h1><a name=\"difficulty-2\" class=\"anchor\" href=\"#difficulty-2\"><\/a>DIFFICULTY:<\/h1>\n<p>Cakewalk<\/p>\n<h1><a name=\"prerequisites-3\" class=\"anchor\" href=\"#prerequisites-3\"><\/a>PREREQUISITES:<\/h1>\n<p>None<\/p>\n<h1><a name=\"problem-4\" class=\"anchor\" href=\"#problem-4\"><\/a>PROBLEM:<\/h1>\n<p>Chef will buy bitcoin if the market risk level is no more than <span class=\"math\">4<\/span>.<br>\nThe current market risk level is <span class=\"math\">R<\/span>.<br>\nWill Chef buy bitcoin?<\/p>\n<h1><a name=\"explanation-5\" class=\"anchor\" href=\"#explanation-5\"><\/a>EXPLANATION:<\/h1>\n<p>The answer is <code>Yes<\/code> if <span class=\"math\">R \\le 4<\/span> and <code>No<\/code> otherwise.<br>\nThis can be checked using an <code>if<\/code> condition.<\/p>\n<h1><a name=\"time-complexity-6\" class=\"anchor\" href=\"#time-complexity-6\"><\/a>TIME COMPLEXITY:<\/h1>\n<p><span class=\"math\">\\mathcal{O}(1)<\/span> per testcase.<\/p>\n<h1><a name=\"code-7\" class=\"anchor\" href=\"#code-7\"><\/a>CODE:<\/h1>\n<details>\n<summary>\nEditorialist's code (PyPy3)<\/summary>\n<pre><code class=\"lang-python\">r = int(input())\nprint('Yes' if r <= 4 else 'No')\n<\/code><\/pre>\n<\/details>",
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"text_editorial_is_markdown": 0,
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"text_editorial_topic_id": 124410,
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"languages_supported": "CPP20, PYTH 3, C, JAVA, PYP3, CS2, NODEJS, GO, TS, PHP, kotlin, rust, R",
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"max_timelimit": "1",
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"source_sizelimit": "50000",
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"problem_author": "archit_adm",
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"problem_display_authors": ["archit_adm"],
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"problem_display_authors_html_handle": "<div class=\"multiple-usernames-container\"><a href='\/users\/archit_adm'>archit_adm<\/a><\/div>",
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"problem_tester": null,
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"problem_testers_usernames": ["kingmessi"],
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"problem_tester_html_handle": "<div class=\"multiple-usernames-container\"><a href='\/users\/kingmessi'><span \n class='rating' \n style='display: inline-block; \n font-size: 10px; \n background: #D0011B;\n padding: 0 3px; \n line-height: 1.3; \n color: white;\n margin-right: 2px;'>7★<\/span><span class='m-username--link'>kingmessi<\/span><\/a><\/div>",
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"problem_editorialist": "iceknight1093",
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"date_added": "20-10-2025",
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"user_tags": ["archit_adm", "cakewalk", "start209"],
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"difficulty_rating": "172",
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"time": {
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"problemDiscussURL": "https:\/\/discuss.codechef.com\/search?q=P1209",
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