Submission #762825

#	Time	Username	Problem	Language	Result	Execution time	Memory
762825		ois	Odašiljači (COCI20_odasiljaci)	C++17	56 / 70	1087 ms	352 KiB

odasiljaci

#include <bits/stdc++.h>
using namespace std;
typedef pair <double, double> pii;
#define fi first
#define se second

pii cord[1005];
int vis[1005], n, qtd;
double mid;


double dist(pii a, pii b){ 
    return (a.fi - b.fi)*(a.fi - b.fi) + (a.se-b.se)*(a.se-b.se);
}

void dfs(int u){
  vis[u] = 1;
  qtd++;
  for(int i = 0; i<n; i++){
    if(vis[i] == 0 && dist(cord[i], cord[u]) < mid*mid) dfs(i);
  }
}

double buscab(){
    double l = 0, r = 2*1e9;
    while(l < r){
        mid = (l+r)/2.0;
        memset(vis, 0, sizeof(vis));
        qtd = 0;
        dfs(0);
        if(qtd == n) r = mid-1e-9;
        else l = mid+1e-9;
    }
    return l;
}

int main(){
    cin >> n;
    cout.precision(9);
    cout.setf(ios::fixed);
    for(int i = 0; i<n; i++) cin >> cord[i].fi >> cord[i].se;
    cout << (buscab())/2.0 << endl;
}

• Subtask 1: 56 / 70