50115. Depth of Water

#include <stdio.h>
#include <stdlib.h>

int main(){
    int a, b, h, c, d;
    scanf("%d %d %d %d %d", &a, &b, &h, &c, &d);
    int v = a * b * h;
    int new_h = v / (a * b - c * d);
    printf("%d\n", new_h);
}