Submission

Score: 50

User: pann

Problemset: อนุกรม

Language: cpp

Time: 1.092 second

Submitted On: 2026-10-02 06:02:21

#include <iostream>
using namespace std;

int ans(int x){
    if (x == 0) return 0;
    if (x == 1) return 1;
    return ans(x-1) + ans(x-2);
}

int main(){
    int n;
    cin >> n;
    cout << ans(n);
    return 0;
}