随笔分类 - 题库—Codeforces比赛
摘要：Orac is studying number theory, and he is interested in the properties of divisors. For two positive integers aa and bb , aa is a divisor of bb if and
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摘要：Hilbert's Hotel is a very unusual hotel since the number of rooms is infinite! In fact, there is exactly one room for every integer, including zero an
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摘要：A card pyramid of height 11 is constructed by resting two cards against each other. For h>1h>1, a card pyramid of height hh is constructed by placing
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摘要：You are given a special jigsaw puzzle consisting of n⋅mn⋅m identical pieces. Every piece has three tabs and one blank, as pictured below. The jigsaw p
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摘要：A. Sum of Round Numbers 把一个数拆成几个整十/百/千...的数的和。 #include <bits/stdc++.h> using namespace std; int main() { int t; cin>>t; while(t--) { int i,num,ans=0;
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摘要：Phoenix has decided to become a scientist! He is currently investigating the growth of bacteria. Initially, on day 11, there is one bacterium with mas
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摘要：Phoenix has a string ss consisting of lowercase Latin letters. He wants to distribute all the letters of his string into kk non-empty strings a1,a2,…,
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摘要：Phoenix loves beautiful arrays. An array is beautiful if all its subarrays of length kk have the same sum. A subarray of an array is any sequence of c
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摘要：Phoenix has nn coins with weights 21,22,…,2n21,22,…,2n. He knows that nn is even. He wants to split the coins into two piles such that each pile has e
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摘要：You are given an undirected unweighted graph consisting of nn vertices and mm edges (which represents the map of Bertown) and the array of prices pp o
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摘要：You are given an array aa consisting of nn integers (it is guaranteed that nn is even, i.e. divisible by 22 ). All aiai does not exceed some integer k
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摘要：Recall that the sequence bb is a a subsequence of the sequence aa if bb can be derived from aa by removing zero or more elements without changing the
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摘要：You are given a positive integer nn , it is guaranteed that nn is even (i.e. divisible by 22 ). You want to construct the array aa of length nn such t
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摘要：Recently Vova found nn candy wrappers. He remembers that he bought xx candies during the first day, 2x2x candies during the second day, 4x4x candies d
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摘要：C. Kaavi and Magic Spell https://blog.csdn.net/qq_43676357/article/details/105559491?fps=1&locationNum=2 有时间仔细研究一下
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摘要：题目描述 Xenia is a girl being born a noble. Due to the inflexibility and harshness of her family, Xenia has to find some ways to amuse herself. Recently
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摘要：Writing light novels is the most important thing in Linova's life. Last night, Linova dreamed about a fantastic kingdom. She began to write a light no
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摘要：Kana was just an ordinary high school girl before a talent scout discovered her. Then, she became an idol. But different from the stereotype, she is a
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摘要：Ichihime is the current priestess of the Mahjong Soul Temple. She claims to be human, despite her cat ears. These days the temple is holding a math co
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摘要：题目描述 The only difference between easy and hard versions is constraints. You are given a sequence a a a consisting of n n n positive integers. Let's de
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