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

int main() {
    float a, b, c, delta, y1, y2;

    printf("Enter a, b, c: ");
    scanf("%f %f %f", &a, &b, &c);

    delta = b * b - 4 * a * c;

    if (delta < 0) {
        printf("No real solution\n");
    } else {
        y1 = (-b + sqrt(delta)) / (2 * a);
        y2 = (-b - sqrt(delta)) / (2 * a);

        if (y1 > 0) {
            printf("x1 = %.2f\n",  sqrt(y1));
            printf("x2 = %.2f\n", -sqrt(y1));
        } else if (y1 == 0) {
            printf("x = 0\n");
        }

        if (y2 > 0) {
            printf("x3 = %.2f\n",  sqrt(y2));
            printf("x4 = %.2f\n", -sqrt(y2));
        } else if (y2 == 0) {
            printf("x = 0\n");
        }
    }
    return 0;
}