#include <bits/stdc++.h>
using namespace std;
int main()
{
    cout<<((1*1)+(1*2)+(1*2*3)+(1*2*3*4)+(1*2*3*4*5));











    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
    cout<<((1*1)+(1*2)+(1*2*3)+(1*2*3*4)+(1*2*3*4*5));
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
    cout<<(1*2*3*4*5=120);
    return 0;
}