09 2017 档案
摘要:针对集合的dp 用整数来表示状态 几种常用技巧 判断第i为是否为1 (这个位是从右数起,从0开始。)if (x&(1<<i) {}或者if ((x>>i)&1) {}。 设置第i位为1 x |= 1<<i; 设置第i位为0 x &= ~(1<<i); 切换第i位 x ^= 1<<i; poj3254
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摘要:Two players, Stan and Ollie, play, starting with two natural numbers. Stan, the first player, subtracts any positive multiple of the lesser of the two
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摘要:The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral posters at all pl
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摘要:You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given numbe...
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