View Code of Problem 69

#include <iostream>

using namespace std;

int fun(int x) {
    if (x < 1) {
        return x;
    }else if (x < 10) {
        return 2 * x - 1;
    }else {
        return 3 * x - 11;
    }
}

int main() {
    int x;
    cin >> x;
    int y =  fun(x);
    cout << y;
}