#include <bits/stdc++.h>
using namespace std;
int a[40] = {6,2,5,5,5,6,3,7,6};
int init()
{
    for(int i = 10;i <= 30;i++)
    {
        a[i] = a[i / 10] + a[i % 10];
    }
}
int main()
{
    init();
    int n;
    cin >> n;
    n -= 4;
    int ans = 0;
    for(int i = 0;i <= 25;i++)
    {
        if(n - i <= 0)  continue;
        for(int j = 0;j <= 25;j++)
        {
            if(n - i - j <= 0)  continue;
            for(int k = 0;k <= 25;k++)
            {
                if(n != i + j + k)   continue;
                ans++;
            }
        }
    }
    cout << ans << endl;
    return 0;
}

我哪里错了？