Description: Two planets named Haha and Xixi in the universe and they were created with the universe beginning.
There is 73 days in Xixi a year and 137 days in Haha a year. Now you know the days N after Big Bang, you need to answer whether it is the first day in a year about the two planets.
Input There are several test cases(about 5 huge test cases). For each test, we have a line with an only integer N(0≤N), the length of N is up to 10000000.
Output For the i-th test case, output Case #i: , then output “YES” or “NO” for the answer.
Sample Input 10001 0 333 Sample Output Case #1: YES Case #2: YES Case #3: NO题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=5832
解题思路：判断输入的数能否被10001整除，因为10001是73和137的最小公倍数。
代码：
#include <iostream> #include <cstdio> #include <cstring> using namespace std; #define N 12000000 #define INF 0x3f3f3f3f char s[N]; int main() { int k=0, len, x, ans; while(~scanf("%s", s)) { k++; len = strlen(s); x = 10001; ans = 0; for(int i = 0; i < len; i++) ans = (ans * 10 + (s[i] - '0') % x) % x; if(ans == 0) printf("Case #%d: YES\n", k); else printf("Case #%d: NO\n", k); } return 0; }