poj 2000 Gold Coins

#include <iostream>#include<cstdio>using namespace std;int a[10001];int main(){    int n,j=1,i=1,temp=1,sum=0;    for(int i = 1;i<=10000;)    {        int k = j;        while(k>0)        { sum += temp; a[i++] = sum; k--;        }        temp++;        j++;    }    while(scanf("%d",&n)!=EOF&&n!=0)    {        printf("%d %dn",n,a[n]);    }    return 0;}