题目链接:http://www.codeforces.com/problemset/problem/122/A
题意:判断一个数是否能被一个lucky number整除,一个lucky number是一个只包含4或7的数。C++代码:#includeint lucky[14] = { 4, 7, 44, 47, 74, 77, 444, 447, 474, 477, 744, 747, 774, 777};bool check(int x){ for (int i = 0; i < 14; i ++) if (x % lucky[i] == 0) return true; return false;}int main(){ int n; scanf("%d", &n); puts(check(n) ? "YES" : "NO"); return 0;}