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A. Heating Several days ago you bought a new house and now you are planning to start a renovation. Since winters in your region can be very cold you n 阅读全文
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int read() { char ch = getchar(); int flag = 1 , ans = 0; while(ch<'0' || ch>'9') if(ch=='-') flag = -1 , ch=getchar(); while(ch>='0' && ch<='9') ans 阅读全文
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图论爆锤场！ 在热身赛的时候 A回文 B ? 某次CF题？FFT? Bitset? ， 嗯 ，这场似乎很Boss C，感觉在哪个 oj 见过， D，模拟？不应该呀，不然怎么会没人A 呢。 开始感觉有点不对，果然，一段时间后榜单开始分区块 赛后，某群，B题Bitset，听说D题有人暴力打表，还A 了， 阅读全文
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standard output The main road in Bytecity is a straight line from south to north. Conveniently, there are coordinates measured in meters from the sout 阅读全文
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output standard output Andryusha goes through a park each day. The squares and paths between them look boring to Andryusha, so he decided to decorate 阅读全文
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A. Changing Volume Bob watches TV every day. He always sets the volume of his TV to bb. However, today he is angry to find out someone has changed the 阅读全文
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Our beloved detective, Sherlock is currently trying to catch a serial killer who kills a person each day. Using his powers of deduction, he came to kn 阅读全文
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Sherlock has a new girlfriend (so unlike him!). Valentine's day is coming and he wants to gift her some jewelry. He bought n pieces of jewelry. The i- 阅读全文
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A. Single Push You're given two arrays a[1…n]a[1…n] and b[1…n]b[1…n], both of the same length nn. In order to perform a push operation, you have to ch 阅读全文
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Let us define a magic grid to be a square matrix of integers of size n×nn×n, satisfying the following conditions. All integers from 00 to (n2−1)(n2−1) 阅读全文