Submission

Score: 50

User: NeolNWza007

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-13 22:26:00

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n;cin>>n;
    if(n>90){
        return 0;
    }
    int n1=1,n2=1;
    if(n==1||n==2){
        cout<<'1';
        return 0;
    }
    for(int i=0; i<n-2; i++){
        int sum=n1+n2;
        n1=n2;
        n2=sum;
    }
    cout<<n2;
}