제출 #889647

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
889647		vjudge1	Tourism (JOI23_tourism)	C++17	5 / 100	5072 ms	13756 KiB

tourism

#include <bits/stdc++.h>
using namespace std;/*
<<<<It's never too late for a new beginning in your life>>>>
Today is hard
  tomorrow will worse
  but the day after tomorrow will be the sunshine..
 
HARD WORK BEATS TALENT WHEN TALENT DOESN'T WORK HARD............
Never give up  */
//The most CHALISHKANCHIK
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define int long long
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pair<int,int> > vii;
const int N = 2e5+50, inf = 1e18, mod = 1e9+7;
vi g[N];
set<pii> mp, path;
set<int> chk;
void dfs(int pos, int pr){
	if(chk.empty())return;
	if(chk.count(pos) > 0){
		chk.erase(chk.find(pos));
		if(!path.empty()){
			for(auto i:path)mp.insert(i);
		}
	}
	for(auto to:g[pos]){
		if(to == pr)continue;
		path.insert({pos, to});
		dfs(to, pos);
		path.erase(path.find({pos, to}));
	}
}
void solve(){
	int n, m, q, a, b;
	cin >> n >> m >> q;
	for(int i = 0; i < n-1; i++){
		cin >> a >> b;
		g[a].pb(b);
		g[b].pb(a);
	}
	int pl[m+1]{};
	for(int i = 1; i <= m; i++){
		cin >> pl[i];
	}
	while(q--){
		int l, r;
		cin >> l >> r;
		for(int i = l; i <= r; i++)chk.insert(pl[i]);
		dfs(pl[l], -1);
		cout << mp.size()+1 << '\n';
		mp.clear();
		path.clear();
	}
}
main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int t = 1;
	//~ cin >> t;
	while(t--){
		solve();
	}
}

컴파일 시 표준 에러 (stderr) 메시지

tourism.cpp:61:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   61 | main(){
      | ^~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 7
• Subtask 4: 0 / 18
• Subtask 5: 0 / 24
• Subtask 6: 0 / 41