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1680: [Usaco2005 Mar]Yogurt factory Description The cows have purchased a yogurt factory that makes world-famous Yucky Yogurt. Over the next N (1 <= N 阅读全文
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>原题链接< 思路: 显然meet in the middle f[i] 表示两质数和为i的方案数 #include <cstdio> #include <cstring> #include <algorithm> using namespace std; const int N = 150010; 阅读全文
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1738: [Usaco2005 mar]Ombrophobic Bovines 发抖的牛 Description FJ's cows really hate getting wet so much that the mere thought of getting caught in the rai 阅读全文
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1674: [Usaco2005]Part Acquisition Description The cows have been sent on a mission through space to acquire a new milking machine for their barn. They 阅读全文
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1654: [Usaco2006 Jan]The Cow Prom 奶牛舞会 Description The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest gow 阅读全文