Jan’s LightOJ :: 1385 - Kingdom Division Solution

1385 - Kingdom Division

    #include <stdio.h>
    #include <math.h>
    int main()
        {
        int T,i;
        double a,b,c,result,div;
        scanf("%d",&T);
        for(i = 0; i<T; i++) {
                scanf("%lf%lf%lf",&a,&b,&c);
                div = ((b * b)-(a * c))/b;
                if((b*b-a*c)/b<=0)
                    printf("Case %d: -1\n",i+1);
                else {
                        result = (a*c)*(b+c+a+b)/div;
                        printf("Case %d: %.8lf\n",i+1,result/b);
                        }

                }


        return 0;
        }