#include<stdio.h>
void main()
{
    float pa,ab;
    int ia;
    if( scanf("%f\n",&pa) !=1||
    scanf("%f\n",&ba) !=1||
    scanf("%f\n",&ia) !=1)
    {
        printf("Invalid input");
    }
    else if(ia!=1)
    {
        printf("Account inactive");
    }
    else if(pa<ab)
    {
        printf("Insufficient Balance");
    }
    else
    {
        float remaining=ab-pa;
        printf("%.2f\n",remaining);
    }
}