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#include <stdio.h>

int main()
{
    double v, debit;
    int hours, numPipes;

    printf("Vuvedete obem, debit, chasove i broi trubi: ");
    scanf("%lf %lf %d %d", &v, &debit, &hours, &numPipes);

    v -= debit * hours * numPipes;

    if (v < 0) {
        printf("Baseinyt e prelql.");
    } else if (v > 0) {
        printf("Baseinyt oshte ne e prelql, ostavat oshte %.2lf litra.", v);
    }

}