#include<stdio.h>
int main(){
    int a,b,c;
    int d;
    d=scanf("%d\n%d\n%d",&a,&b,&c);
    if(d!=3){
        printf("Invalid input");
        return 0;
    }
    if(c!=1){
        printf("Account Inactive");
        return 0;
    }
    if(a>b){
        printf("Insufficient Balance");
    }else{
        a=b-a;
        a=(float)a;
        printf("%.2f",a);
    }
}