hdu 1014 Uniform Generator

#include<iostream>#include<string>#define Max 100005using namespace std;int ch[Max], ch1[Max];int main(){int a, b;while(scanf("%d%d", &a, &b) != EOF){memset(ch1, 0, sizeof(ch1));int i;ch[0] = 0;for(i = 1; ; i++){ch[i] = (ch[i-1]+a) % b;ch1[ch[i]]++;if(ch[i] == 0)break;}printf("%10d%10d", a, b);for(i = 0; i < b; i++){if(ch1[i] != 1){printf("    Bad Choice\n"); break;}}if(i == b)printf("    Good Choice\n");printf("\n");}return 0;}