Submission

Score: 100

User: GONGGONG

Problemset: อนุกรม

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-04 02:20:11

#include <iostream>
using namespace std;
int main(){
    long long a=1,b=1,n;cin>>n;
    for(int i=2;i<n;i++){
        if(a<=b) a+=b;
        else b+=a;
    }
    if((n<=0)||(n>90)) return 0;
    if(a<=b) cout<<b;
    else cout<<a;
}