POJ 2661

#include<iostream>
#include<stdio.h>
using namespace std;

int main()
{
    //freopen("acm.acm","r",stdin);
    int a[21] = {3,5,8,12,20,34,57,98,170,300,536,966,1754,3210,5910,10944,20366,38064,71421,134480,254016};
    int num;
    while(cin>>num,num)
    {
        num -= 1960;
        num /= 10;
        cout<<a[num]<<endl;
    }
}