Submission

Score: 50

User: kinzap

Problemset: อนุกรม

Language: cpp

Time: 1.094 second

Submitted On: 2025-10-12 12:43:20

#include <iostream>
using namespace std;

int n;

long long f(int x){
    if(x<=0){
        return 0;
    }
    if(x==1){
        return 1;
    }
    return f(x-1)+f(x-2);
}
int main(){
    cin >> n;
    cout << f(n);
}