제출 #889796

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
889796		vjudge1	Tourism (JOI23_tourism)	C++17	5 / 100	5062 ms	11476 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 long long N = 2e5+50, inf = 1e18, mod = 1e9+7;
vi g[N];
set<pii> mp, jol;
set<int> chk;
void dfs(int pos, int pr){
	if(chk.empty())return;
	if(chk.count(pos) > 0){
		chk.erase(chk.find(pos));
		if(!jol.empty()){
			for(auto i:jol){
				mp.insert(i);
			}
		}
	}
	for(auto to:g[pos]){
		if(to == pr)continue;
		jol.insert({pos, to});
		dfs(to, pos);
		jol.erase(jol.find({pos, to}));
	}
}


void solve(){
	int n, m, q, a, b;
	cin >> n >> m >> q;
	bool ok = 1;
	for(int i = 0; i < n-1; i++){
		cin >> a >> b;
		g[a].push_back(b);
		g[b].push_back(a);
		if(a!=i+1 || b!=i+2)ok = 0;
	}
	int pl[m+1]{};
	for(int i = 1; i <= m; i++){
		cin >> pl[i];
	}
	if(ok){
		while(q--){
			int l, r;
			cin >> l >> r;
			int mn = 1e18;
			int mx = 0;
			for(int i = l; i <= r; i++){
				mx = max(mx, pl[i]);
				mn = min(mn, pl[i]);
			}
			cout << mx-mn+1 << '\n';
		}
	}else{
		while(q--){
			int l, r;
			cin >> l >> r;
			for(int i = l+1; i <= r; i++)chk.insert(pl[i]);
			dfs(pl[l], -1);
			cout << mp.size()+1 << '\n';
			mp.clear();
			//~ queue<pii> q;
			//~ q.push({pl[l], 0});
			//~ int us[n+1]{};
			//~ while(!q.empty()){
				//~ auto [pos, ds] = q.front();
				//~ cout << pos << ' ' << ds << '\n';
				//~ q.pop();
				//~ us[pos] = 1;
				//~ for(auto to:g[pos]){
					//~ if(us[to])continue;
					//~ if(chk.count(to)){
						//~ ans += ds+1;
						//~ ds = 0;
					//~ }
				//~ }
				//~ for(auto to:g[pos]){
					//~ if(us[to])continue;
					
					//~ if(chk.count(to)){
						//~ chk.erase(to);
						//~ q.push({to, 0});
					//~ }else q.push({to, ds+1});
				//~ }
				//~ if(chk.empty())break;
			//~ }
			//~ cout << ans+1 << '\n';
		}
	}
}
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:106:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  106 | 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