添加题解

基础调试

选择编程语言

比赛策略

编程比赛

参与贡献

在命令行中使用 C++

数据类型

如何调试

C++ 调试

前置知识要求

快速输入输出

（选学）C++——编写泛型代码

输入与输出

算法竞赛简介

（可选）C++ Lambda 表达式

资源：学习编程

模块介绍

信息学奥林匹克竞赛

如何练习

资源：算法竞赛

资源：美国相关

在本地运行代码

在线运行代码

USACO 集训营

USACO 常见问题

USACO 月赛题目

如何使用本指南

使用 MDX

非典型问题

分类讨论

使用递归的完全搜索

USACO 铜组补充练习

基础完全搜索

数据结构简介

图简介

贪心算法简介

集合与映射简介

排序简介

矩形几何

模拟

时间复杂度

组合数学

整除

模运算

Binary Search

Binary Search on a Sorted Array

Additional Practice for USACO Silver

Flood Fill

Introduction to Functional Graphs

Graph Traversal

Greedy Algorithms with Sorting

Intro to Bitwise Operators

Introduction to Tree Algorithms

More on Prefix Sums

Introduction to Prefix Sums

Priority Queues

Custom Comparators and Coordinate Compression

Two Pointers

DP on Trees - Solving For All Roots

Additional Practice for USACO Gold

(Optional) Sorted Sets with Custom Comparators

Bitmask DP

Range DP

DP on Trees - Introduction

Disjoint Set Union

Digit DP

Hashing

(Optional) Hashmaps

Introduction to DP

More Operations on Sorted Sets

Knapsack DP

(Optional) LCA with Euler Tour

Longest Increasing Subsequence

Minimum Spanning Trees

(Optional) Meet In The Middle

Point Update Range Sum

Paths on Grids

Shortest Paths with Non-Negative Edge Weights

Sliding Window

Stacks

Optimizing Unimodal Functions

Topological Sort

(Optional) Euler Tour Technique

Shortest Paths with Unweighted Edges

2D Range Queries

Binary Jumping

(Optional) Bitsets

Centroid Decomposition

Additional Practice for USACO Platinum

Convex Hull

Convex Hull Trick

Divide & Conquer - DP

Divide & Conquer - SRQ

Sum over Subsets DP

Geometry Primitives

Heavy-Light Decomposition

Matrix Exponentiation

Small-To-Large Merging

Inclusion-Exclusion Principle

Solving greedy problems by sorting the input.

Studying Algorithms

"use strict";
const {Fragment: _Fragment, jsx: _jsx, jsxs: _jsxs} = arguments[0];
const frontmatter = undefined;
function _createMdxContent(props) {
 const _components = {
 a: "a",
 code: "code",
 h2: "h2",
 p: "p",
 pre: "pre",
 strong: "strong",
 ...props.components
 }, {CPPSection, HeaderLink, JavaSection, LanguageSection, MATHSPAN, PySection, Spoiler, YouTube} = _components;
 if (!CPPSection) _missingMdxReference("CPPSection", true);
 if (!HeaderLink) _missingMdxReference("HeaderLink", true);
 if (!JavaSection) _missingMdxReference("JavaSection", true);
 if (!LanguageSection) _missingMdxReference("LanguageSection", true);
 if (!MATHSPAN) _missingMdxReference("MATHSPAN", true);
 if (!PySection) _missingMdxReference("PySection", true);
 if (!Spoiler) _missingMdxReference("Spoiler", true);
 if (!YouTube) _missingMdxReference("YouTube", true);
 return _jsxs(_Fragment, {
 children: [_jsxs(_components.h2, {
 id: "video-solution",
 children: [_jsx(_components.a, {
 "aria-hidden": "true",
 tabIndex: "-1",
 className: "anchor before",
 href: "#video-solution",
 children: _jsx(HeaderLink, {})
 }), "Video Solution"]
 }), "\n", _jsx(_components.p, {
 children: "By Atharv Jain"
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 title: "Video Solution Code",
 children: [_jsxs(_components.h2, {
 id: "implementation",
 children: [_jsx(_components.a, {
 "aria-hidden": "true",
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 className: "anchor before",
 href: "#implementation",
 children: _jsx(HeaderLink, {})
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 children: [_jsx(_components.strong, {
 children: "Time Complexity:"
 }), " ", _jsx(MATHSPAN, {
 className: "language-math math-inline",
 latex: "\\mathcal{O}(N \\log N)",
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 })]
 }), _jsxs(LanguageSection, {
 children: [_jsx(CPPSection, {
 children: _jsx(_components.pre, {
 children: _jsx(_components.code, {
 className: "language-cpp",
 children: "#include <bits/stdc++.h>\nusing namespace std;\n\nint main() {\n\tios_base::sync_with_stdio(0);\n\tcin.tie(0);\n\tint n, x;\n\tcin >> n >> x;\n\tvector<int> a(n);\n\tfor (int i = 0; i < n; i++) cin >> a[i];\n\tsort(a.begin(), a.end());\n\tfor (int i = 0; i < n; i++) {\n\t\tif (a[i] > x) {\n\t\t\tcout << i << \"\\n\";\n\t\t\texit(0);\n\t\t}\n\t\tx -= a[i];\n\t}\n\tcout << n << \"\\n\";\n}\n"
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 children: "import java.io.*;\nimport java.util.*;\n\npublic class Main {\n\tint n, x;\n\tpublic static void main(String[] args) {\n\t\tKattio io = new Kattio();\n\t\tint n = io.nextInt(), x = io.nextInt();\n\t\tint a[] = new int[n];\n\t\tfor (int i = 0; i < n; i++) a[i] = io.nextInt();\n\t\tArrays.sort(a);\n\t\tint ans = n;\n\t\tfor (int i = 0; i < n; i++) {\n\t\t\tif (x < a[i]) {\n\t\t\t\tans = i;\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tx -= a[i];\n\t\t}\n\t\tio.println(ans);\n\t\tio.close();\n\t}\n\t//BeginCodeSnip{Kattio}\n\tstatic class Kattio extends PrintWriter {\n\t\tprivate BufferedReader r;\n\t\tprivate StringTokenizer st;\n\t\t// standard input\n\t\tpublic Kattio() { this(System.in, System.out); }\n\t\tpublic Kattio(InputStream i, OutputStream o) {\n\t\t\tsuper(o);\n\t\t\tr = new BufferedReader(new InputStreamReader(i));\n\t\t}\n\t\t// USACO-style file input\n\t\tpublic Kattio(String problemName) throws IOException {\n\t\t\tsuper(problemName + \".out\");\n\t\t\tr = new BufferedReader(new FileReader(problemName + \".in\"));\n\t\t}\n\t\t// returns null if no more input\n\t\tpublic String next() {\n\t\t\ttry {\n\t\t\t\twhile (st == null || !st.hasMoreTokens())\n\t\t\t\t\tst = new StringTokenizer(r.readLine());\n\t\t\t\treturn st.nextToken();\n\t\t\t} catch (Exception e) { }\n\t\t\treturn null;\n\t\t}\n\t\tpublic int nextInt() { return Integer.parseInt(next()); }\n\t\tpublic double nextDouble() { return Double.parseDouble(next()); }\n\t\tpublic long nextLong() { return Long.parseLong(next()); }\n\t}\n\t//EndCodeSnip\n}\n"
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 });
}
function MDXContent(props = {}) {
 const {wrapper: MDXLayout} = props.components || ({});
 return MDXLayout ? _jsx(MDXLayout, {
 ...props,
 children: _jsx(_createMdxContent, {
 ...props
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 }) : _createMdxContent(props);
}
return {
 frontmatter,
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};
function _missingMdxReference(id, component) {
 throw new Error("Expected " + (component ? "component" : "object") + " `" + id + "` to be defined: you likely forgot to import, pass, or provide it.");
}