Submission

Score: 40

User: Darleneee93

Problemset: อนุกรม

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-07 10:00:09

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

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

    if (num > 90 || num <0){
        return 1;
    }
    if (num == 1){
        return num;
    }


    for (int i=1;i < num;i++){
        c=a+b;
        a=b;
        b=c;
    }
    cout << c << endl;

}