SOLUTION OF URI 1043

//   question of uri 1043 Triangle
// 1043  (Mahmud_Jamil) BRUR






#include <stdio.h>
int main()
{
    float a, b, c;
    scanf("%f %f %f", &a, &b, &c);
    if(a+b>c && a+c>b && b+c>a){
            printf("Perimetro = %.1f\n", a+b+c);
    }
    else{
            printf("Area = %.1f\n", .5*(a+b)*c);
    }

    return 0;
}