제출 #786308

#제출 시각아이디문제언어결과실행 시간메모리
786308ono_de206Thousands Islands (IOI22_islands)C++17
컴파일 에러
0 ms0 KiB
#include "islands.h"
#include<bits/stdc++.h>
using namespace std;

#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

//#define int long long
 
typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;

const int mxn = 1e5 + 10;
vector<pair<int, int>> g[mxn];
bool tp, found;
vector<int> ans;
int vis[mxn], p[mxn];

void dfs(int to, int fr) {
	p[to] = fr;
	vis[to] = 1;
	vector<int> lol;
	for(auto it : g[to]) {
		int x = it.ff, id = it.ss;
		if(id == fr || vis[x]) continue;
		lol.pb(id);
	}
	if(lol.size() >= 2 && !tp) {
		vector<int> tmp = ans;
		tmp.pb(lol[0]);
		tmp.pb(lol[0] ^ 1);
		tmp.pb(lol[1]);
		tmp.pb(lol[1] ^ 1);
		tmp.pb(lol[0] ^ 1);
		tmp.pb(lol[0]);
		tmp.pb(lol[1] ^ 1);
		tmp.pb(lol[1]);
		tmp.in(tmp.end(), ans.rbegin(), ans.end());
		swap(tmp, ans);
		found = 1;
		return;
	}
	if(found) return;
	for(auto it : g[to]) {
		int x = it.ff, id = it.ss;
		if(vis[x] == 2) continue;
		if(id / 2 == fr / 2) continue;
		ans.pb(id);
		if(vis[x] == 1) {
			found = 1;
			vector<int> cyc;
			while(ans.size() && ans.back() != p[x]) {
				cyc.pb(ans.back());
				ans.pop_back();
			}
			reverse(all(cyc));
			vector<int> tmp = ans;
			if(tp) {
				for(int x : cyc) tmp.pb(x);
				for(int x : cyc) tmp.pb(x ^ 1);
				reverse(all(cyc));
				for(int x : cyc) tmp.pb(x);
				for(int x : cyc) tmp.pb(x ^ 1);
			} else {
				for(int x : cyc) tmp.pb(x);
				reverse(all(cyc));
				for(int x : cyc) tmp.pb(x ^ 1);
				for(int x : cyc) tmp.pb(x);
				reverse(all(cyc));
				for(int x : cyc) tmp.pb(x ^ 1);
			}
			tmp.in(tmp.end(), ans.rbegin(), ans.rend());
			swap(tmp, ans);
		} else {
			dfs(x, id);
		}

		if(found) return;
		ans.pop_back();
	}
	vis[to] = 2;
}

variant<bool, vector<int>> find_journey(int n, int m, vector<int> U, vector<int> V) {
	if(n == 2) {
		vector<int> a0, a1;
		for(int i = 0; i < m; i++) {
			if(U[i] == 0) a0.pb(i);
			else a1.pb(i);
		}
		if(a0.size() >= 2 && a1.size() >= 1) return vector<int>{a0[0], a1[0], a0[1], a0[0], a1[0], a0[1]};
		else return false;
	}
	if(U[0] == U[1]) tp = 1;
	for(int i = 0; i < m; i++) {
		g[U[i]].eb(V[i], i);
	}
	dfs(0, -10000);
	if(found) return ans;
	return false;
}

컴파일 시 표준 에러 (stderr) 메시지

islands.cpp: In function 'void dfs(int, int)':
islands.cpp:46:44: error: no matching function for call to 'std::vector<int>::insert(std::vector<int>::iterator, std::vector<int>::reverse_iterator, std::vector<int>::iterator)'
   46 |   tmp.in(tmp.end(), ans.rbegin(), ans.end());
      |                                            ^
In file included from /usr/include/c++/10/vector:72,
                 from islands.h:2,
                 from islands.cpp:1:
/usr/include/c++/10/bits/vector.tcc:130:5: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, const value_type&) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::iterator = std::vector<int>::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<int>::const_iterator; std::vector<_Tp, _Alloc>::value_type = int]'
  130 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/vector.tcc:130:5: note:   candidate expects 2 arguments, 3 provided
In file included from /usr/include/c++/10/vector:67,
                 from islands.h:2,
                 from islands.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:1293:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::iterator = std::vector<int>::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<int>::const_iterator; std::vector<_Tp, _Alloc>::value_type = int]'
 1293 |       insert(const_iterator __position, value_type&& __x)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1293:7: note:   candidate expects 2 arguments, 3 provided
/usr/include/c++/10/bits/stl_vector.h:1310:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::initializer_list<_Tp>) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::iterator = std::vector<int>::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<int>::const_iterator]'
 1310 |       insert(const_iterator __position, initializer_list<value_type> __l)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1310:7: note:   candidate expects 2 arguments, 3 provided
/usr/include/c++/10/bits/stl_vector.h:1335:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::vector<_Tp, _Alloc>::size_type, const value_type&) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::iterator = std::vector<int>::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<int>::const_iterator; std::vector<_Tp, _Alloc>::size_type = long unsigned int; std::vector<_Tp, _Alloc>::value_type = int]'
 1335 |       insert(const_iterator __position, size_type __n, const value_type& __x)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1335:51: note:   no known conversion for argument 2 from 'std::vector<int>::reverse_iterator' {aka 'std::reverse_iterator<__gnu_cxx::__normal_iterator<int*, std::vector<int> > >'} to 'std::vector<int>::size_type' {aka 'long unsigned int'}
 1335 |       insert(const_iterator __position, size_type __n, const value_type& __x)
      |                                         ~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:1379:2: note: candidate: 'template<class _InputIterator, class> std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, _InputIterator, _InputIterator) [with _InputIterator = _InputIterator; <template-parameter-2-2> = <template-parameter-1-2>; _Tp = int; _Alloc = std::allocator<int>]'
 1379 |  insert(const_iterator __position, _InputIterator __first,
      |  ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1379:2: note:   template argument deduction/substitution failed:
islands.cpp:46:44: note:   deduced conflicting types for parameter '_InputIterator' ('std::reverse_iterator<__gnu_cxx::__normal_iterator<int*, std::vector<int> > >' and '__gnu_cxx::__normal_iterator<int*, std::vector<int> >')
   46 |   tmp.in(tmp.end(), ans.rbegin(), ans.end());
      |                                            ^