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E. Compress WordsProblemAmugae has a sentence consisting of nnn words. He want to compress this sentence into one word. Amugae doesn’t like repetitions, so when he merges two words into one word, he...

D. White LinesProblemGildong has bought a famous painting software cfpaint. The working screen of cfpaint is square-shaped consisting of nnn rows and nnn columns of square cells. The rows are number...

C. Round CorridorProblemAmugae is in a very large round corridor. The corridor consists of two areas. The inner area is equally divided by nnn sectors, and the outer area is equally divided by mmm s...

B. Block AdventureProblemGildong is playing a video game called Block Adventure. In Block Adventure, there are n columns of blocks in a row, and the columns are numbered from 111 to nnn. All blocks ...

A. HotelierProblemAmugae has a hotel consisting of 101010 rooms. The rooms are numbered from 000 to 999 from left to right.The hotel has two entrances — one from the left end, and another from the ...

硬核の暴力Math --CodeForces - 1062B题目链接 [link](https://codeforces.com/contest/1088/problem/C)Math --CodeForces - 1062B题目链接 linkC. Ehab and a 2-operation tasktime limit per test：1 secondmemory l...

C. Common DivisorsProblemYou are given an array aaa consisting of nnn integers.Your task is to say the number of such positive integers xxx such that xxx divides each number from the array. In othe...

B. Equal RectanglesProblemYou are given 4×n4 \times n4×n sticks, the length of the ithi^{th}ith stick is aia_iai​.You have to create nnn rectangles, each rectangle will consist of exactly 444 stick...

E. BoxersProblemThere are nnn boxers, the weight of the ithi^{th}ith boxer is aia_iai​. Each of them can change the weight by no more than 1 before the competition (the weight cannot become equal to...

A. Circle of StudentsProblemThere are nnn students standing in a circle in some order. The index of the ithi^{th}ith student is pip_ipi​. It is guaranteed that all indices of students are distinct i...

D. Remove the SubstringProblemYou are given a string sss and a string ttt, both consisting only of lowercase Latin letters. It is guaranteed that ttt can be obtained from sss by removing some (possi...