杭电ACM HDU 1014

#include <cstdio>int main(){    int step,mod;    int m[100001];    while(~scanf("%d%d",&step,&mod)){        m[0]=0;        int i;        for(i=0;i<mod;i++){            m[i+1]=(m[i]+step)%mod;            if(m[i+1]==0)break;        }        printf("%10d%10d    ",step,mod);        if(i==mod-1)printf("Good Choice\n\n");        else printf("Bad Choice\n\n");    }}