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codeforces

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全部文章 / codeforces （共130篇）

D. Nastya and Scoreboard

链接：https://codeforces.ml/contest/1341/problem/C Denis, who managed to buy flowers and sweets (you will learn about this story in the next task), went...

2020-09-15

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C. Hilbert's Hotel

链接：https://codeforces.ml/contest/1345/problem/C Hilbert's Hotel is a very unusual hotel since the number of rooms is infinite! In fact, there is exac...

2020-09-15

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D. Monopole Magnets

链接：https://codeforces.ml/contest/1345/problem/D A monopole magnet is a magnet that only has one pole, either north or south. They don't actually exis...

2020-09-15

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C1. Simple Polygon Embedding

链接：https://codeforces.ml/contest/1354/problem/C1 The statement of this problem is the same as the statement of problem C2. The only difference is tha...

2020-09-15

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B. Orac and Models

链接：https://codeforces.ml/contest/1350/problem/B There are nn models in the shop numbered from 11 to nn, with sizes s1,s2,…,sns1,s2,…,sn. Orac will b...

2020-09-15

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C. Orac and LCM

链接：https://codeforces.ml/contest/1350/problem/C For the multiset of positive integers s={s1,s2,…,sk}s={s1,s2,…,sk}, define the Greatest Common Diviso...

2020-09-15

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D. Orac and Medians

链接：https://codeforces.ml/contest/1350/problem/D Slime has a sequence of positive integers a1,a2,…,ana1,a2,…,an. In one operation Orac can choose an ...

2020-09-15

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G. A/B Matrix

链接：https://codeforces.ml/contest/1360/problem/G You are given four positive integers nn, mm, aa, bb (1≤b≤n≤501≤b≤n≤50; 1≤a≤m≤501≤a≤m≤50). Find any su...

2020-09-15

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E. Modular Stability

链接：https://codeforces.ml/contest/1359/problem/E We define xmodyxmody as the remainder of division of xx by yy (%% operator in C++ or Java, mod operat...

2020-09-15

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C. Mixing Water

链接：https://codeforces.ml/contest/1359/problem/C There are two infinite sources of water: hot water of temperature hh; cold water of temperature c...

2020-09-15

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