#include <iostream>
#include <math.h>
using namespace std;
float otrezok(float x1, float y1, float x2, float y2)
{
	float result;
	result = sqrt(pow(x1 - x2, 2) + pow(y1 - y2, 2));
	return result;
}
bool IsTriangle(double a, double b, double c)
{
	return (a < b + c) && (b < a + c) && (c < a + b);
}