1001.cpp

第33届ACM亚洲区域赛（哈尔滨赛区预选）1001题目源码

#include<iostream>
#include<cmath>
#define PI 0.01745
using namespace std;
int main(){
	double x, y, l, w, deg, len, lentmp;
	while(scanf("%lf%lf%lf%lf", &x, &y, &l, &w) != EOF){
		len = INT_MAX;
		for(deg = 0.01; deg < 90.0; deg += 0.01){
			lentmp = ((y / sin(deg * PI) - w) / cos(deg * PI) + x - y / tan(deg * PI)) / sin(deg * PI);
			if(lentmp > len){
				break;
			}else{
				len = lentmp;
			}
		}
		if(l <= len)
			printf("yes\n");
		else
			printf("no\n");
	}
}