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ACM练习题

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全部文章 / ACM练习题（共250篇）

hdu3069——Saruman's Army

Saruman the White must lead his army along a straight path from Isengard to Helm’s Deep. To keep track of his forces, Saruman distributes seeing stone...

2021-04-05

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Codeforces1005C——Summarize to the Power of Two

A sequence a1,a2,…,an is called good if, for each element ai, there exists an element aj (i≠j) such that ai+aj is a power of two (that is, 2d for some...

2021-04-05

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Codeforces1005D——Polycarp and Div 3

Polycarp likes numbers that are divisible by 3. He has a huge number s. Polycarp wants to cut from it the maximum number of numbers that are divisibl...

2021-04-05

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Codeforces1005E1——Median on Segments (Permutations Edition)

You are given a permutation p1,p2,…,pn. A permutation of length n is a sequence such that each integer between 1 and n occurs exactly once in the sequ...

2021-04-05

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Codeforces1003A——Polycarp's Pockets

Polycarp has n coins, the value of the i-th coin is ai. Polycarp wants to distribute all the coins between his pockets, but he cannot put two coins wi...

2021-04-05

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Codeforces1003B——Binary String Constructing

You are given three integers a, b and x. Your task is to construct a binary string s of length n=a+b such that there are exactly a zeroes, exactly b o...

2021-04-05

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Codeforces1003C——Intense Heat

The heat during the last few days has been really intense. Scientists from all over the Berland study how the temperatures and weather change, and the...

2021-04-05

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Codeforces1003D——Coins and Queries

Polycarp has n coins, the value of the i-th coin is ai. It is guaranteed that all the values are integer powers of 2 (i.e. ai=2d for some non-negative...

2021-04-05

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Codeforces1004A——Sonya and Hotels

Sonya decided that having her own hotel business is the best way of earning money because she can profit and rest wherever she wants. The country whe...

2021-04-05

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Codeforces1004B——Sonya and Exhibition

Sonya decided to organize an exhibition of flowers. Since the girl likes only roses and lilies, she decided that only these two kinds of flowers shoul...

2021-04-05

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