ACM 11715 - Car

#include <stdio.h>
#include <math.h>
double u, v, t, s, a;

int main()
{
    int n, caseNum = 1;
    while( scanf("%d", &n) == 1 && n)
    {
        printf("Case %d: ", caseNum ++);   
        switch (n)
        {
            case 1: 
                scanf("%lf %lf %lf", &u, &v, &t);
                a = (v - u) / t;
                s = (v * v - u * u) / (2 * a);
                printf("%.3lf %.3lf\n", s, a);
                break;
            case 2: 
                scanf("%lf %lf %lf", &u, &v, &a);
                t = (v - u) / a;
                s = (v * v - u * u) / (2 * a);
                printf("%.3lf %.3lf\n", s, t);
                break;
            case 3: 
                scanf("%lf %lf %lf", &u, &a, &s);
                v = sqrt((u * u + 2 * a * s));
                t = (v - u) / a;
                printf("%.3lf %.3lf\n", v, t);
                break;
            case 4: 
                scanf("%lf %lf %lf", &v, &a, &s);
                u = sqrt((v * v - 2 * a * s));
                t = (v - u) / a;
                printf("%.3lf %.3lf\n", u, t);
                break;           
        }
    }
     
    return 0;
}

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