#include<bits/stdc++.h>
using namespace std;
int main()
{
double u, v, a, s, t;
int x, i = 1;
cout << showpoint;
cout << fixed;
cout << setprecision(3);
while(cin >> x && x > 0)
{
u = v = a = s = t = 0;
if(x == 1)
{
cin >> u >> v >> t;
s = ((u+v)/2)*t;
a = (v-u)/t;
cout << "Case " << i++ << ": " << s << " " << a << endl;
}
if(x == 2)
{
cin >> u >> v >> a;
t = (v-u)/a;
s = ((u+v)/2)*t;
cout << "Case " << i++ << ": " << s << " " << t << endl;
}
if(x == 3)
{
cin >> u >> a >> s;
double d = (u*u) + 2*a*s;
v = sqrt(d);
t = (v-u)/a;
cout << "Case " << i++ << ": " << v << " " << t << endl;
}
if(x == 4)
{
cin >> v >> a >> s;
double d = (v*v) - 2*a*s;
u = sqrt(d);
t = (v-u)/a;
cout << "Case " << i++ << ": " << u << " " << t << endl;
}
}
return 0;
}
using namespace std;
int main()
{
double u, v, a, s, t;
int x, i = 1;
cout << showpoint;
cout << fixed;
cout << setprecision(3);
while(cin >> x && x > 0)
{
u = v = a = s = t = 0;
if(x == 1)
{
cin >> u >> v >> t;
s = ((u+v)/2)*t;
a = (v-u)/t;
cout << "Case " << i++ << ": " << s << " " << a << endl;
}
if(x == 2)
{
cin >> u >> v >> a;
t = (v-u)/a;
s = ((u+v)/2)*t;
cout << "Case " << i++ << ": " << s << " " << t << endl;
}
if(x == 3)
{
cin >> u >> a >> s;
double d = (u*u) + 2*a*s;
v = sqrt(d);
t = (v-u)/a;
cout << "Case " << i++ << ": " << v << " " << t << endl;
}
if(x == 4)
{
cin >> v >> a >> s;
double d = (v*v) - 2*a*s;
u = sqrt(d);
t = (v-u)/a;
cout << "Case " << i++ << ": " << u << " " << t << endl;
}
}
return 0;
}
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