Submission

Score: 100

User: mister_o_hater_no1

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.002 second

Submitted On: 2025-09-11 15:55:25

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

long long find_time(int n) {
	if(n== 0) return 0;
	if(n== 1) return 4;
	long long time[200]; time[0]= 0; time[1]= 4;
	for(int i= 2; i<= n; ++i) {
		time[i]= 2* time[i- 1]- time[i- 2]+ 6;
	}

	return time[n];
}

int main() {
    cin.tie(nullptr)->sync_with_stdio(0);
    int n;cin>> n;
    cout<< find_time(n);

    return 0;
}