#include <stdio.h>

int main(void)
{
double a, b, c, d;

scanf("%lf%lf%lf", &a, &b, &c);

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

if(d < 0) printf("「実数解無し」");
else if(d > 0) printf("「実数解は２つ」");
else printf("「実数解は一つ」");

return 0;
}