View Code of Problem 69

#include <iostream>
using namespace std;

int main(){
  int x,y;
  cin>>x;
  
  if(x<1)
    y = x;
  else if(x>=1&&x<10)
    y = 2*x-1;
  else
    y = 3*x-11;
  
  printf("%d",y);
  return 0;
}