CodeForces 630 J. Divisibility(数论)
Description 给出一整数n,问1~n中能够整除2~10的数的个数 Input 一整数n(1<=n<=10^18) Output 1~n中能整除2~10的数的个数 Sample Input 3000 Sample Output 1 Solution 简单数学题,2~10的最小公倍数为2520,所以1~n中能整除2~10的数有n/2520个 Code#include<c