Problem about GCD Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 470 Accepted Submission(s): 77 Problem Description Given integer m. Find multiplication of all 1<=a<=m such gcd(a, m)=1 (cop…
If we sum up every digit of a number and the result can be exactly divided by 10, we say this number is a good number. You are required to count the number of good numbers in the range from A to B, inclusive. InputThe first line has a number T (T <=…
首先感谢刘汝佳所著的<算法竞赛入门经典>. 众所周知,C++中储存能力最大的unsigned long long 也是有着一个上限,如果我们想计算非常大的整数时,就不知所措了,所以,我写了一个高精度类,允许大整数的四则运算 这个类利用字符串进行输入输出,并利用数组进行储存与处理,通过模拟四则运算,可以计算很大的整数的加减乘除比大小. 支持负数,前导零,支持字符串.整型赋值,支持流输入输出 贴上我的代码: #include<string> #include<iostream&g…