Submission

PPPPPPPPPP

Score: 100

User: un8qe_x3

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-03-14 21:27:51

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

int fib(int n) {
    if (n == 0) {
        return 0;
    } else if (n == 1) {
        return 1;
    }
    int a = 0, b = 1;
    for (int i = 2; i <= n; i++) {
        int temp = b;
        b = a + b;
        a = temp;
    }
    return b;
}

int32_t main() {
    int npt;
    cin >> npt;
    cout << fib(npt) << endl;
    return 0;
}