#include <stdio.h>
#include <math.h>

int main(){

    float xv,a,b;

    printf("Entre com os valores\n");
    scanf("%f%f",&a,&b);

    if(a>0){
        xv = b/(2*a);
        printf("O valor minimo e: %f", xv);
    }

    else{
        xv = b/(2*a);
        printf("O valor maximo e: %f", xv);
    }
}