Submission

Score: 100

User: Folk_DIWA

Problemset: อนุกรม

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-12 20:31:25

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

using ll = long long;

int main(){
    cin.tie(0)->sync_with_stdio(0);

    vector <ll> v(101);
    v[0] = v[1] = 1;

    for(int i=2; i<=90; i++){
        v[i] = v[i-1] + v[i-2];
    }

    int n; cin >> n;
    n--;
    
    cout << v[n];

    return 0;
}