// by Robin Brämer
#include <stdio.h>

int main()
{

    while (1 == 1) {
        printf("Anzahl Widerstände: ");

        int a;
        scanf("%i", &a);

        if (a < 2) {
            printf("Bitte mindestens 2 Widerstande an.\n");
            continue;
        }

        float g, in;
        for (int i = 0; i < a; i++) {
            printf("%i/%i Widerstand: ", i+1,a);
            scanf("%f", &in);

            g = g + 1/in;
        }

        printf("Der Gesamtwiederstand ist: %.3f\n", 1/g);
        printf("___________________________________________\n");
    }
}