hdu1216 Assistance Required

纯模拟题

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#include <iostream>
using namespace std;
#define N 35000
int arr[N]={0};
int lucky[N];
void init()
{
int i,j,k,n;
    n = 0;
for (i=2;i<N;i++)
    {
if(0 == arr[i])
        {
            lucky[n++] = i;
            k = i+1;
            j = 0;
while(k<N)
            {
if(arr[k]==0)
                {   
                    j++;
                }
if(i==j)
                {
                    j = 0;
                    arr[k] = 1;
                }
                k++;
            }
        }
    }
}
int main()
{
int n;
    init();
while (scanf("%d",&n)!=EOF&&n!=0)
    {
        printf("%d\n",lucky[n-1]);
    }
return 0;
}