Submission

Score: 50

User: thereal_zenitsu10

Problemset: อนุกรม

Language: cpp

Time: 0.006 second

Submitted On: 2026-10-15 14:05:22

#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    unsigned long long n;
    if((cin>>n)&&((n>=0)&&(n<=40))){
        unsigned long long int f1=0,f2=1;
        for(int i=1;i<=n-1;i++){
        unsigned long long temp= f1+f2;
            f1=f2;
            f2=temp;
        }
        cout<<f2<<'\n';
    }
    return 0;
}