제출 #1152299

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1152299		Sandarach151	Odašiljači (COCI20_odasiljaci)	C++20	컴파일 에러	0 ms	0 KiB

odasiljaci

#include<iostream>
#include<vector>
#include<tuple>
using namespace std;

vector<pair<double, pair<int, int> > > vect;
vector<int> sze;
vector<int> link;

int find(int a){
	while(a!=link[a]){
		a = link[a];
	}
	return a;
}

bool same(int a, int b){
	return find(a)==find(b);
}

void unite(int a, int b){
	a = find(a);
	b = find(b);
	if(sze[a]<sze[b]){
		swap(a, b);
	}
	link[b]=a;
	sze[a]+=sze[b];
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int n;
	cin >> n;
	pair<int, int> points[n];
	sze.assign(n, 1);
	for(int i=0; i<n; i++){
		link.push_back(i);
	}
	for(int i=0; i<n; i++){
		int a, b;
		cin >> a >> b;
		points[i] = make_pair(a, b);
	}
	for(int i=0; i<n; i++){
		for(int j=i+1; j<n; j++){
			vect.push_back(make_pair(sqrt(pow(points[i].first-points[j].first, 2) + pow(points[i].first-points[j].first, 2)), make_pair(i, j)));
		}
	}
	sort(vect.begin(), vect.end());
	int cnt = 0;
	double ans = 0;
	for(int i=0; i<vect.size(); i++){
		int a = vect[i].second.first;
		int b = vect[i].second.second;
		if(!same(a, b)){
			unite(a, b);
			cnt += 1;
			ans = vect[i].first / 2;
		}
		if(cnt==n*(n-1)/2) break;
	}
	cout << ans << '\n';
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

odasiljaci.cpp: In function 'int main()':
odasiljaci.cpp:48:55: error: 'pow' was not declared in this scope
   48 |                         vect.push_back(make_pair(sqrt(pow(points[i].first-points[j].first, 2) + pow(points[i].first-points[j].first, 2)), make_pair(i, j)));
      |                                                       ^~~
odasiljaci.cpp:48:50: error: 'sqrt' was not declared in this scope
   48 |                         vect.push_back(make_pair(sqrt(pow(points[i].first-points[j].first, 2) + pow(points[i].first-points[j].first, 2)), make_pair(i, j)));
      |                                                  ^~~~