Submission

Score: 40

User: Newton4566

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2026-09-21 10:01:23

#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;

    int sum = 0;
    int pairs[2] = {0, 1};

    for (int i = 1; i < n; i++) {
        sum = pairs[0] + pairs[1];
        pairs[0] = pairs[1];
        pairs[1] = sum;
    }

    cout << sum << endl;
}