Submission

Score: 40

User: vern6767

Problemset: อนุกรม

Language: cpp

Time: 0.004 second

Submitted On: 2026-09-21 11:33:44

#include <iostream>
using namespace std;

int main() {
    int n = 0;
    int a = 1, b = 1, c = 0;
    cin >> n;

    for (int i = 3; i <= n; i++) {
        c = a + b;
        a = b;
        b = c;
    }

    cout << c;
    return 0;
}