Submission

Score: 100

User: exoworldgd

Problemset: Sigma Croissant

Language: cpp

Time: 0.002 second

Submitted On: 2026-02-24 23:13:55

#pragma GCC optimize("O5,unroll-loops,inline,fast-math,omit-frame-pointer,tree-vectorize")
#pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt,tune=native,fma,abm,mmx,sse")
#include<bits/stdc++.h>
#define int long long
#define exoworldgd cin.tie(0)->sync_with_stdio(0),cout.tie(0)
using namespace std;
int a,b,c=1;
signed main(void){
	exoworldgd;
	cin>>a;
	for(int i=1;i<=a;i++)c*=i,b+=c;
	cout<<b;
}