Submission

Score: 100

User: andamanlnwza007

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-01 14:32:34

#include <iostream>
#include <vector>
using namespace std;
int main(){
	vector <long long> keep={1,1};
	int n;
	long long sum=0;
	cin>>n;
	for (long i = 1 ; i<n ; i++){
		keep[i+1]=keep[i]+keep[i-1];
	}
	sum=keep[n-1];
	cout<<sum;
}