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C. Swap Letters time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Monocarp has got two str 阅读全文
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W - Prime Time 题意:用公式n*n+n+41,判断素数的百分比 #include<iostream> #include<algorithm> #include<math.h> #include<string.h> #include<string> #define ll long lon 阅读全文
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A - Bi-shoe and Phi-shoe Bamboo Pole-vault is a massively popular sport in Xzhiland. And Master Phi-shoe is a very popular coach for his success. He n 阅读全文
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D. Treasure Island time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output All of us love treasur 阅读全文
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F. Fixing Banners time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output Harbin, whose name was 阅读全文
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题目描述 A newspaper is published in Walrusland. Its heading is s 1 , it consists of lowercase Latin letters. Fangy the little walrus wants to buy several 阅读全文