HDU 1014 Uniform Generator

是否能产生不同mod-1个随机数

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
const int N = 100005;
int main()
{

    freopen("C:\Users\super\Documents\CB_codes\in.txt", "r", stdin);
    //freopen("C:\Users\super\Documents\CB_codes\out.txt","w",stdout);
    int step, mod;
    int mark[N],temp,t_temp;
    bool suit;
    while(~scanf("%d%d", &step, &mod) ) {
        memset(mark, -1, sizeof(mark));
        suit = true;
        temp = 0;
        for(int i = 0; i < mod; i ++) {
            temp = (temp + step) % mod;
            if(mark[temp] == 1) {
                suit = false;
                break;
            }
            else {
                mark[temp] = 1;
            }
        }
        printf("%10d%10d",step,mod);
        if(suit) {
            printf("    Good Choice

");
        }
        else {
            printf("    Bad Choice

");
        }

    }


    fclose(stdin);
    return 0;
}