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全部文章（共943篇）

【CodeForces - 260C】Balls and Boxes （思维模拟，有坑，时光倒流）

题干： Little Vasya had n boxes with balls in the room. The boxes stood in a row and were numbered with numbers from 1 to n from left to right. Once Va...

2018-11-14

0 696

【CodeForces - 260B 】Ancient Prophesy （暴力匹配，BF算法，日期字符串）

题干： A recently found Ancient Prophesy is believed to contain the exact Apocalypse date. The prophesy is a string that only consists of digits and cha...

2018-11-14

0 415

【CodeForces - 260A】Adding Digits （思维构造）

题干： Vasya has got two number: a and b. However, Vasya finds number a too short. So he decided to repeat the operation of lengthening number a n times...

2018-11-14

0 592

【POJ - 1463】Strategic game （树上最小点覆盖，树形dp）

题干： Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad. Now...

2018-11-14

0 521

【CodeForces - 260D】Black and White Tree （思维构造，猜结论，细节，构造一棵树）

题干： The board has got a painted tree graph, consisting of n nodes. Let us remind you that a non-directed graph is called a tree if it is connected an...

2018-11-14

0 421

【POJ - 2909 】Goldbach's Conjecture （哥德巴赫猜想，数论，知识点结论）

题干： For any even number n greater than or equal to 4, there exists at least one pair of prime numbers p1 and p2 such that n = p1 + p2 This conjectu...

2018-11-12

0 437

【POJ - 2262】Goldbach's Conjecture （数论，哥德巴赫猜想，知识点结论）

题干： In 1742, Christian Goldbach, a German amateur mathematician, sent a letter to Leonhard Euler in which he made the following conjecture: Every...

2018-11-12

0 354

【 HDU - 5363】Key Set（水题，快速幂，组合数学）

题干： soda has a set SS with nn integers {1,2,…,n}{1,2,…,n}. A set is called key set if the sum of integers in the set is an even number. He wants to k...

2018-11-12

0 464

【POJ - 3048】Max Factor （数论，打表，水题）

题干： To improve the organization of his farm, Farmer John labels each of his N (1 <= N <= 5,000) cows with a distinct serial number in the range...

2018-11-12

0 682

【HDU - 2012】素数判定（水题，数论，打表）

题干：解题报告： AC代码1： #include<bits/stdc++.h> #define MAX 10000//求MAX范围内的素数 using namespace std; long long su[MAX],cnt; bool isprime...

2018-11-12

0 337