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摘要： 题目链接：http://acm.hit.edu.cn/hoj/problem/view?id=1867每次更新时判断是否素数，如果从非素数变成素数就Update(x, 1)，如果从素数变成非素数就Update(x, -1)。 1 /*HIT 1867 2 经理的烦恼 3 */ 4 #include 5 #include 6 const int N=1000009; 7 8 int a[N],c[N],n,m,C; 9 int prime(int num)10 {11 int i;12 if(num0)37 {38 s += c[num];39 ... 阅读全文

摘要： Mobile phonesTime Limit: 5000MSMemory Limit: 65536KTotal Submissions: 13774Accepted: 6393DescriptionSuppose that the fourth generation mobile phone base stations in the Tampere area operate as follows. The area is divided into squares. The squares form an S * S matrix with the rows and columns numbe 阅读全文