Triangle

#include<stdio.h>

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 = %0.1lf", A+B+C);
    }

    else
    {
         printf("Area = %0.1lf", ((A+B)/2)+C);
    }
}