Submission

Score: 100

User: Patn01Z

Problemset: อนุกรม

Language: cpp

Time: 0.004 second

Submitted On: 2026-09-28 21:11:16

#include <iostream>
using namespace std;

int main(){
   long long a[89]={0};
   int n=0; cin >> n;
   a[0]=1;
   a[1]=1;
   if(n<=2){
    cout << 1;
    return 0;
   }
   else{
        for(int i=2;i<n;i++){
            a[i]=a[i-1]+a[i-2];
        }
        cout << a[n-1];
        return 0;
   }
}