zoj 1314 Uniform Generator

#include<iostream>#include<string.h>#include<stdio.h>using namespace std;int step,mod;int vis[100000];bool check(){       vis[0]=1;       int temp=0;       int cnt=0;       while (cnt<mod-1)       {   int k=(temp+step)%mod;   if (vis[k])   {          return false;   }   vis[k]=1;   temp=k;   cnt++;       }       return true;}int main(){       while (cin>>step>>mod)       {   memset(vis,0,sizeof(vis));   if (check())   {          printf("%10d%10d    Good Choicen",step,mod);   }   else          printf("%10d%10d    Bad Choicen",step,mod);   printf("n");       }}