Why this code not showing correct output? www.codechef.com/problems/HS08TEST

using namespace std;

int main() {
// your code goes here
float in;
int amount;

    cin >> amount>> in;
if(amount%5!=0 || amount>in)
        cout<<fixed<<setprecision(2)<<((in-amount)-0.50 );

return 0;


replace your condition with
if(amount%5!=0 || amount>in-0.5)

as if in input, (amount) is equal to (in) then your code will give output of -0.50 which cannot be a value of account balance remaining.

test case for wrong answer of your code
300 300.00

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