A water problem

Time Limit: 5000/2500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 362    Accepted Submission(s): 199 Problem 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   Author UESTC   Source 2016中国大学生程序设计竞赛 - 网络选拔赛

#include<stdio.h> #include<string.h> #include<algorithm> using namespace std; #define maxn 10000010 char a[maxn]; const int mod1=73; const int mod2=137; int main() { int cnt=1; //freopen("in.txt","r",stdin); while(scanf("%s",a)!=EOF) { int ans1=0,ans2=0; int len=strlen(a); for(int i=0;i<len;i++){ ans1=(ans1*10+(a[i]-'0'))%mod1; ans2=(ans2*10+(a[i]-'0'))%mod2; } if(ans1==ans2&&ans1==0) printf("Case #%d: YES",cnt++); else printf("Case #%d: NO",cnt++); puts(""); } return 0; }