View Code of Problem 69

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