The Embarrassed Cryptographer Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 15069   Accepted: 4132 Description The young and very promising cryptographer Odd Even has implemented the security module of a large system with thousands of…

题目链接 题意:K是由两个素数乘积,如果最小的素数小于L,输出BAD最小的素数,否则输出GOOD 分析 素数打表将 L 大点的素数打出来,一定要比L大,然后就开始枚举,只需K对 素数 取余 看看是否为零,但是 k 是一个很大的数,怎么存储又是一个问题,很好的一个解决方案:用千进制来表示 :加入是 1234567890 表示成 [890][567][234][1]这样存储,如果是十进制对 k 取余,那么就是 从最高位开始 加上 上步*10再取余,放在这里就是*1000 #include <iost…

题目链接:http://poj.org/problem?id=2635 题目分析: http://blog.csdn.net/lyy289065406/article/details/6648530…

题意:给出一个大数,这个大数由两个素数相乘得到,让我们判断是否其中一个素数比L要小,如果两个都小,输出较小的那个. 分析:大数求余的方法:针对题目中的样例,143 11,我们可以这样算,1 % 11 = 1:      1×10 + 4 % 11 = 3:      3×10 + 3 % 11 = 0;我们可以把大数拆成小数去计算,同余膜定理保证了这个算法的这正确性,而且我们将进制进行一定的扩大也是正确的. 注意:素数打标需要优化,否则超时.   进制需要适当,100和1000都可以,10进制超…

The Embarrassed Cryptographer Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 11978   Accepted: 3194 Description The young and very promising cryptographer Odd Even has implemented the security module of a large system with thousands of…

The Embarrassed Cryptographer Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 15767   Accepted: 4337 Description The young and very promising cryptographer Odd Even has implemented the security module of a large system with thousands of…

The Embarrassed Cryptographer DescriptionThe young and very promising cryptographer Odd Even has implemented the security module of a large system with thousands of users, which is now in use in his company. The cryptographic keys are created from th…

大数取MOD... The Embarrassed Cryptographer Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 11359 Accepted: 3026 Description The young and very promising cryptographer Odd Even has implemented the security module of a large system with thousan…

The Embarrassed Cryptographer Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 13041 Accepted: 3516 Description The young and very promising cryptographer Odd Even has implemented the security module of a large system with thousands of user…

最小与最大 [问题描述] 做过了乘积最大这道题,相信这道题也难不倒你. 已知一个数串,可以在适当的位置加入乘号(设加了k个,当然也可不加,即分成k+1个部分),设这k+1个部分的乘积(如果k=0,则乘积即为原数串的值)对m 的余数(即mod m)为x; 现求x能达到的最小值及该情况下k的最小值,以及x能达到的最大值及该情况下的k的最小值(可以存在x的最小值与最大值相同的情况). [输入] 第一行为数串,长度为n 满足2<=n<=1000,且数串中不存在0: 第二行为m,满足2<=m<…