View Code of Problem 69

int hanshu(int x){
	if(x<1)
		return x;
	else if(x>=1&&x<10)
		return 2*x-1;
	else
		return 3*x-11;
}

#include<stdio.h>
void main(){
	int x,y;
	scanf("%d",&x);
	y=hanshu(x);
	printf("%d",y);
}