1043.cpp

#include <bits/stdc++.h>
using namespace std;
int main()

{

    double a,b,c;

    scanf("%lf %lf %lf",&a,&b,&c);


    if (a < b + c && b < a + c && c < a + b)

    {

        printf("Perimetro = %.1f\n", a + b + c);

    }

    else

    {

        printf("Area = %.1f\n", c * (a + b) / 2);

    }

    return 0;

}