P4703 偷上网

乱搞

#include <bits/stdc++.h>
/*
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/hash_policy.hpp>
*/
using namespace std;

const double eps = 1e-10;
const double pi = 3.1415926535897932384626433832795;
const double eln = 2.718281828459045235360287471352;

#define f(i, a, b) for (int i = a; i <= b; i++)
#define scan(x) scanf("%d", &x)
#define mp make_pair
#define pb push_back
#define lowbit(x) (x&(-x))

#define fi first
#define se second
#define SZ(x) int((x).size())
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define summ(a) (accumulate(all(a), 0ll))

typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef vector<int> vi;

using ll=long long;

ll l,n,dis; 
vector <pair<double,double>> v;

 bool ck(double x,double y){
     for(auto [aa,bb]:v){
         if(n*n*((aa-x)*(aa-x)+(bb-y)*(bb-y))<=(l*1.0)*(l*1.0))return false;
     }
     return true;
 }

int main()
{
    scanf("%lld%lld",&n,&l);
    std::random_device rd;
    std::default_random_engine eng(rd());
    std::uniform_real_distribution<double> num(0.0,l*1.0);
    for(int i=1;i<=n;++i){
        double x,y;
        scanf("%lf%lf",&x,&y);
        v.push_back({x,y});
    }
    for(int i=1;i<=1e4;++i){
        double x=num(eng),y=num(eng);
        if(ck(x,y)){
            printf("%.8lf %.8lf",x,y);
            return 0;
        }
    }
    printf("%s","GG\n");
    return 0;
}