Submission

Score: 100

User: samsenpisardmoo69

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2026-10-02 14:11:58

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

long long fib(int n)
{
    long long a = 0;
    long long b = 1;
    
    for(int i=0; i<n; i++)
    {
        long long c = a+b;
        a = b;
        b = c;
    }
    
    return a;
}

int main()
{
    int n;
    cin >> n;
    long long ans = fib(n);
    cout << ans;
}