#include <iostream>
using namespace std;
int main() {
double A, B, C;
scanf("%lf%lf%lf", &A, &B, &C);
if ((A + B) > C && (A + C) > B && (B + C) > A) {
printf("Perimetro = %.1lf\n", A + B + C);
} else {
printf("Area = %.1lf\n", 0.5 * (A + B) * C);
}
return 0;
}