Submission #422259

#	Time	Username	Problem	Language	Result	Execution time	Memory
422259		dreezy	친구 (IOI14_friend)	C++17	Compilation error	0 ms	0 KiB

friend

#include <bits/stdc++.h>
#include "friend.h"
using namespace std;


/*******************/
#define pi pair<int,int>
#define ll long long
#define f first
#define s second
#define pb push_back

struct UnionFind{
	vector<int> parent, height, sz;
	
	void init(int n){
		height.clear();
		height.assign(n, 0);
		parent.clear();
		parent.assign(n, 0);
		sz.clear();
		sz.assign(n, 1);
		for(int i=0; i<n ;i++){
			parent[i] = i;
			
		}
	}
	
	int root(int n){
		if(parent[n]!= n)
			parent[n] = root(parent[n]);
		return parent[n];
	}
	
	bool same(int n1, int n2){
		return root(n1) == root(n2);
	}
	
	void join(int n1, int n2){
		int r1 = root(n1);
		int r2 = root(n2);
		
		if(height[r1] > height[r2]){
			parent[r2] = r1;
			height[r1] = max(height[r1], height[r2] + 1);
			sz[r1] += sz[r2];
			//cout << sz[r1]<<"; "<<sz[r2]<<endl;
		}else{
			parent[r1] = r2;
			height[r2] = max(height[r2], height[r1] + 1);
			sz[r2]+=sz[r1];
			//cout << sz[r1]<<";; "<<sz[r2]<<endl;
		}
	}
	
};


int findSample(int n,int confidence[],int host[],int protocol[]){
	
	UnionFind uf;
	uf.init(n);
	for(int i =1; i<n; i++){

		if(protocol[i] == 1){
			uf.join(i, host[i]);
			//cout << i <<", "<<host[i]<<endl;
		}
	}
	
	set<int> roots;
	for(int i =0;i < n; i++){
		roots.insert(uf.root(i));
	}
	int ans =0;
	for(int rt : roots){
		//cout <<rt<<": "<< uf.sz[rt]<<endl;
		ans = max(ans, uf.sz[rt]);
	}
	
	return max(ans, roots.size());
}

/*******************/

Compilation message (stderr)

friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:81:30: error: no matching function for call to 'max(int&, std::set<int>::size_type)'
   81 |  return max(ans, roots.size());
      |                              ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from friend.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
friend.cpp:81:30: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::set<int>::size_type' {aka 'long unsigned int'})
   81 |  return max(ans, roots.size());
      |                              ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from friend.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
friend.cpp:81:30: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::set<int>::size_type' {aka 'long unsigned int'})
   81 |  return max(ans, roots.size());
      |                              ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from friend.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3480:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
 3480 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3480:5: note:   template argument deduction/substitution failed:
friend.cpp:81:30: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   81 |  return max(ans, roots.size());
      |                              ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from friend.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3486:5: note:   template argument deduction/substitution failed:
friend.cpp:81:30: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   81 |  return max(ans, roots.size());
      |                              ^