View Code of Problem 69

#include<stdio.h>
#include <string.h>
int main(){
	int f(int n);
	int x;
	scanf("%d",&x);
	int y;
	y=f(x);
	printf("%d",y);
	printf("\n");
	return 0;
}
int f(int n){
	int b;
	if(n<1){
		b=n;
	}
	else if(n>=1&&n<10){
		b=2*n-1;
	}
	else{
		b=3*n-11;
	}
	return b;
}