#include <bits/stdc++.h>
using namespace std;
typedef long long LL;

int fun(){
    int sum = 0;
    int n = 1;
    while (n <= 25){
        sum += n * n * n;
        n += 1;
    }
    return sum;
}

int main(){
    printf("%d", fun());
    return 0;
}