144.cpp

来自「平时acm训练时ac的源代码」· C++ 代码 · 共 28 行

//144

#include <stdio.h>

int main(void)
{
	int X, Y;
	float w, gl, t, t2;
	scanf("%d %d %f", &X, &Y, &w);
	if (Y<X)
	{
		Y += 24;
	}
	t = (float)((Y-X)*60);
	if (w<=t)
	{
		t2 = (t-w)*w;
		t2 += (w/2)*w;
		t2 = t2/t/t*2;
	}
	else
	{
		t2 = 1.0;
	}
	printf("%.7f", t2);
	return 0;
}