标签:href ble http ret else clu 题意 efi 链接
【链接】 我是链接,点我呀:)
【题意】
题意
【题解】
算出来每个盘子要占用多少角度。
然后乘n看看是不是小于等于2π就好
(精度最好定在1e-7)
【代码】
#include <bits/stdc++.h>
#define ll long long
#define double long double
using namespace std;
const int N = 3e5;
double pi = acos(-1.0);
int n;
double R,r;
double sqr(double x){
return x*x;
}
int main(){
ios::sync_with_stdio(0),cin.tie(0);
cin >> n >> R >> r;
if (r>R){
cout<<"NO"<<endl;
}else if (r<=R){
if (r*2<=R){
double a = asin(r/(R-r));
if (a*2*n-(1e-7)>2*pi){
cout<<"NO"<<endl;
}else cout<<"YES"<<endl;
}else{
if (n==1){
cout<<"YES"<<endl;
}else{
cout<<"NO"<<endl;
}
}
}
return 0;
}
【Codeforces 140A】New Year Table
标签:href ble http ret else clu 题意 efi 链接
原文地址:https://www.cnblogs.com/AWCXV/p/10705313.html