Submission

Score: 90

User: Ricon

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-07 06:49:45

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

int main() {
    int n;
    cin >> n;
    vector<long long> ans(n+1);

    ans[0] = 0;
    if (n > 1) ans[1] = 1;

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

    cout << ans[n];

    return 0;
}