HDU1014 ( Uniform Generator )

Problem : 1014 ( Uniform Generator )     Judge Status : Accepted
RunId : 5542633    Language : C++    Author : ssun
Code Render Status : Rendered By HDOJ C++ Code Render Version 0.01 Beta

#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;

const int N=100000;
int main()
{
    int arr[N];
    int i,count,j;
    long step,mod;
    while(cin>>step>>mod)
    {
        arr[0] = 0;
        for(i=1; i<mod; i++)
        {
            arr[i] = (arr[i-1] + step) % mod;//求数组各个值
        }
        sort(arr,arr+mod);//将数组排序，便于比较
        bool flag = true;
        for(i=0; i<mod; i++)
        {
            //如果有一个不相等就跳出，并标记为假
            if(arr[i] != i) 
            {
                flag =false;
                break;
            }
        }
        if(flag)
            printf("%10d%10d    %s\n\n",step,mod,"Good Choice");//注意格式,那里有四个空格
        else
            printf("%10d%10d    %s\n\n",step,mod,"Bad Choice");
    }
    return 0;
}