URI 1542 SOUTION. (Try na kore dekhben na apu :P)

#include <stdio.h>

int main(){
    int q, d, p;
    while(scanf("%d", &q) != EOF){
        if(q == 0) break;

        scanf("%d %d", &d, &p);

        int page = (p * q * d)/(p - q);

        printf("%d\n", page);
    }
}