View Code of Problem 69

#include <stdio.h>
#include <string.h>
#include <math.h>
#define N 100
int main()
{
	int a;
	scanf("%d", &a);
	if (a < 1) 
	{
		printf("%d", a);
	}
	if (a >= 1 && a < 10)
	{
		printf("%d", 2*a-1);
	}
	if (a >= 10)
	{
		printf("%d", 3*a-11);
	}
	
}