제출 #753347

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
753347		Dan4Life	Meetings (JOI19_meetings)	C++17	컴파일 에러	0 ms	0 KiB

meetings

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

#define pb push_back
#define sz(a) (int)a.size()
#define all(a) begin(a),end(a)
const int mxN = (int)2e3+10;
int n, used[mxN];
set<int> S[mxN];
map<array<int,3>,int> M;

int query(int a, int b, int c){
	if(a>b) swap(a,b);
	if(b>c) swap(b,c);
	if(a>b) swap(a,b);
    if(M.count({a,b,c})) return M[{a,b,c}]
	return Query(a,b,c);
}

void mergeSort(vector<int> &v, int a, int b){
	if(sz(v)<=1) return;
	int mid = sz(v)/2;
	vector<int> w,x; w.clear(), x.clear();
	for(int i = 0; i < mid; i++) w.pb(v[i]);
	for(int i = mid; i < sz(v); i++) x.pb(v[i]);
	mergeSort(w,a,b), mergeSort(x,a,b); v.clear();
	int i = 0, j = 0;
	while(i<sz(w) and j<sz(x)){
		if(query(a,w[i],x[j])==w[i]) v.pb(w[i++]);
		else v.pb(x[j++]);
	}
	while(i<sz(w)) v.pb(w[i++]);
	while(j<sz(x)) v.pb(x[j++]);
}

void recur(int a, set<int> SS){
	if(SS.empty()) return;
	auto itr = SS.begin();
	int r = rand()%sz(SS);
	while(r--) itr++;
	int b = *itr; used[a]=used[b]=1;
	vector<int> path; path.clear();
  set<int> S[n+1];
  for(int i = 0; i < n; i++) S[i].clear();
	for(auto i : SS){ if(!used[i]){
			int x = query(a,b,i);
			if(x==i) path.pb(i),used[i]=1;
			else S[x].insert(i);
		}
	}
	mergeSort(path,a,b);
	if(path.empty()) Bridge(a,b);
	else Bridge(a,path[0]),Bridge(path.back(),b);
	for(int i = 0; i < sz(path)-1; i++) Bridge(path[i],path[i+1]);
	for(auto u : path) recur(u,S[u]);
  recur(a,S[a]); recur(b,S[b]);
}

void Solve(int N) {
	n = N; vector<int> v;
	for(int i = 1; i < n; i++) S[0].insert(i);
	recur(0,S[0]);
}

컴파일 시 표준 에러 (stderr) 메시지

meetings.cpp: In function 'int query(int, int, int)':
meetings.cpp:16:43: error: expected ';' before 'return'
   16 |     if(M.count({a,b,c})) return M[{a,b,c}]
      |                                           ^
      |                                           ;
   17 |  return Query(a,b,c);
      |  ~~~~~~                                    
meetings.cpp:17:9: error: 'Query' was not declared in this scope; did you mean 'query'?
   17 |  return Query(a,b,c);
      |         ^~~~~
      |         query
meetings.cpp: In function 'void recur(int, std::set<int>)':
meetings.cpp:52:19: error: 'Bridge' was not declared in this scope
   52 |  if(path.empty()) Bridge(a,b);
      |                   ^~~~~~
meetings.cpp:53:7: error: 'Bridge' was not declared in this scope
   53 |  else Bridge(a,path[0]),Bridge(path.back(),b);
      |       ^~~~~~
meetings.cpp:54:38: error: 'Bridge' was not declared in this scope
   54 |  for(int i = 0; i < sz(path)-1; i++) Bridge(path[i],path[i+1]);
      |                                      ^~~~~~