Submission #1152309

#	Time	Username	Problem	Language	Result	Execution time	Memory
1152309		Sandarach151	Odašiljači (COCI20_odasiljaci)	C++17	Compilation error	0 ms	0 KiB

odasiljaci

#include<bits/stdc++.h>
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;
}

Compilation message (stderr)

odasiljaci.cpp:6:13: error: 'std::vector<int> link' redeclared as different kind of entity
    6 | vector<int> link;
      |             ^~~~
In file included from /usr/include/x86_64-linux-gnu/bits/sigstksz.h:24,
                 from /usr/include/signal.h:328,
                 from /usr/include/c++/11/csignal:42,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:43,
                 from odasiljaci.cpp:1:
/usr/include/unistd.h:819:12: note: previous declaration 'int link(const char*, const char*)'
  819 | extern int link (const char *__from, const char *__to)
      |            ^~~~
odasiljaci.cpp: In function 'int find(int)':
odasiljaci.cpp:9:24: warning: pointer to a function used in arithmetic [-Wpointer-arith]
    9 |         while(a!=link[a]){
      |                        ^
odasiljaci.cpp:9:16: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    9 |         while(a!=link[a]){
      |               ~^~~~~~~~~
odasiljaci.cpp:10:27: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   10 |                 a = link[a];
      |                           ^
odasiljaci.cpp:10:27: error: invalid conversion from 'int (*)(const char*, const char*) noexcept' to 'int' [-fpermissive]
   10 |                 a = link[a];
      |                     ~~~~~~^
      |                           |
      |                           int (*)(const char*, const char*) noexcept
odasiljaci.cpp: In function 'void unite(int, int)':
odasiljaci.cpp:25:15: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   25 |         link[b]=a;
      |               ^
odasiljaci.cpp:25:16: error: assignment of read-only location '*(link + ((sizetype)b))'
   25 |         link[b]=a;
      |         ~~~~~~~^~
odasiljaci.cpp: In function 'int main()':
odasiljaci.cpp:37:22: error: request for member 'push_back' in 'link', which is of non-class type 'int(const char*, const char*) noexcept'
   37 |                 link.push_back(i);
      |                      ^~~~~~~~~