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