View Code of Problem 69

#include<stdio.h>
int fan(int x){
	int y;
	if(x<1)
		y=x;
	else if(x>=1&&x<10)
		y=2*x-1;
	else if(x>=10)
		y=3*x-11;
	return y;
}


main(){
	int a,b;
	scanf("%d",&a);
	b=fan(a);
	printf("%d",b);
}