Submission

Score: 50

User: fillhavertz

Problemset: อนุกรม

Language: cpp

Time: 1.098 second

Submitted On: 2025-10-07 00:35:01

#include <iostream>
using namespace std;
int patt(int p){
    if(p==0) return 0;
    else if(p==1) return 1;
    else return patt(p-1)+patt(p-2);
}
int main()
{   
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n;
    cin>>n;
    cout<<patt(n);
    return 0;
    
    
    
    
}