50分求调

50分，5TLE求调

#include<bits/stdc++.h>
using namespace std;
int tj(int n){
    int c;
    if(n == 1) c = 1;
    else if(n == 2) c = 2;
    else{
        c = tj(n - 1) + tj(n - 2);
    }
    return c;
}
int main(){
    int n;
    cin >> n;
    if(n == 0) {
        cout << 0;
        return 0;
    }
    cout << tj(n);
    return 0;
}