View Code of Problem 69

#include <stdio.h>
//写一段程序，输入x，输出y
int main()
{
  int x,y;
  scanf("%d",&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;
}