View Code of Problem 69

#include<stdio.h>
#include<math.h>
int f(int x)
{
	int y;
	if(x<1)
	y=x;
	if(x>=1&&x<10)
	y=2*x-1;
	if(x>=10)
	y=3*x-11;
	return(y); 
}
main()
{
	int a,b;
	scanf("%d",&a);
	b=f(a);
	printf("%d",b);
}