#include<stdio.h>
int main()
{
	int a,b,c;
	float rb;
	scanf("%d %d %d",&a,&b,&c);
	if(a<0||b<0||c<0)
	{
		printf("Invalid input");
	}
	else{
		rb=b-a;
		if(a>b){
			printf("Insufficient Balance");
		}
		else {if(c==0)
		
			printf("Account Inactive");
		}
		else if(c!=1)
		{
		    printf("Invalid input");
		}
		else{
			printf("%.2f\n",rb);
		}
	}
}