#include<stdio.h>
int main()
{
    int x,y,z;
    if(scanf("%d",&x)!=1||
       scanf("%d",&y)!=1||
       scanf("%d",&z)!=1){ 
           
       printf("Invalid input");
       return 0;
    }
if(z!=1&&z!=0)
{
    printf("Invalid input");
    return 0;
}
if(z==0)
{
    printf("Account Inactive");
}
else if(x>y)
{
    printf("Insufficient Balance"):
}
else
{
    float remaining=y-x;
    printf("%.2f",remaining);
}
return 0;
}