View Code of Problem 69

#include <iostream>
#include <cstdio>
using namespace std;
int main(){
    int x,y;
    cin>>x;
    if(x<1)
        y=x;
            else if(1<=x&&x<10)
            y=2*x-1;
           else if(x>=10)
               y=3*x-11;
    cout<<y<<endl;
    return 0;
}