답안 #751831

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
751831	2023-06-01T14:51:18 Z	minhcool	코끼리 (Dancing Elephants) (IOI11_elephants)	C++17	컴파일 오류	0 ms	0 KB

elephants

#include "elephants.h"
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
 
#define ll long long
#define fi first
#define se second
#define pb push_back
//#define mp make_pair
 
typedef pair<int, int> ii;
typedef pair<ii, ii> iii;
typedef pair<ii, ii> iiii;
 
const int N = 3e6 + 5;
 
const int oo = 1e9 + 7, mod = 1e9 + 7;
 
mt19937 rng(1);
 
ll rnd(ll l, ll r){
	ll temp = rng() % (r - l + 1);
	return abs(temp) + l;
}

struct cmp{
	bool operator()(const ii& a, const ii& b){
		return a.fi < b.fi;
	}
};
 
set<ii, cmp> mls;
 
int n, l, arr[N];
 
pair<int, int> nxt[N][21];
 
void rebuild(){
	arr[n] = oo;
	vector<ii> v;
//	for(int i = 0; i <= n; i++) v.pb({arr[i], i});
//	sort(v.begin(), v.end());
	set<ii>::iterator itr = mls.begin();
	for(auto it : mls){
		//cout << arr[i] + l + 1 << "\n";
		while(itr != mls.end() && ((*itr).fi <= (it.fi + l))) itr++;
		//vector<ii>::iterator it = lower_bound(v.begin(), v.end(), make_pair(arr[i] + l + 1, -oo));
		//nxt[i][0] = (it == v.end() ? make_pair(oo, n) : (*it));
	//	cout << (itr == mls.end()) << "\n";
		nxt[it.se][0] = (itr == mls.end() ? make_pair(oo, n) : (*itr));
	//	cout << it.fi << " " << it.se << " " << nxt[it.se][0].fi << " " << nxt[it.se][1].se << "\n";
		//cout << nxt[i][0].fi << " " << nxt[i][0].se << "\n";
	}
	nxt[n][0] = {oo, n};
	for(int i = 1; i <= 8; i++){
		for(int j = 0; j <= n; j++){
			nxt[j][i] = nxt[nxt[j][i - 1].se][i - 1];
			//cout << i << " " << j << " " << nxt[j][i].fi << " " << nxt[j][i].se << "\n";
		}
	}
}
 
int counter = 0;
 
set<int> poss;
 
unordered_set<int> ins;
gp_hash_table<int, int> mp1, mp2;

gp_hash_table<int, set<int>> tempo;
 
bool all(int pos){
	return (mp1[pos] == mp2[pos]);
}
 
void init(int N, int L, int X[]){
	n = N, l = L;
	for(ll i = 0; i < n; i++) arr[i] = X[i];
	for(ll i = 0; i < n; i++) mls.insert({arr[i], i});
	for(int i = 0; i < n; i++) mp1[arr[i]]++;
	rebuild();
	poss.insert(-1), poss.insert(1e9 + 1);
}
 
int cnt = 0;
int update(int i, int y){
	counter++;
	mls.erase({arr[i], i});
	mp1[arr[i]]--;
	if(ins.find(i) != ins.end()) mp2[arr[i]]--;
	poss.insert(arr[i]);
	arr[i] = y;
	ins.insert(arr[i]);
	mp2[arr[i]]++;
	poss.insert(arr[i]);
	mp1[arr[i]]++;
	mls.insert({arr[i], i});
	/*
	int ans = 0, lst = -1;
	for(auto it : mls){
		if(lst > it) continue;
		ans++;
		lst = it + l;
	}*/
	int ans = 0;
	int lst = -1;
	bool ck = 1;
	for(auto itt : poss){
		int it = itt;
	//	cout << counter << " " << it << " " << lst << " " << arr[lst] << " " << ans << " " << all(arr[lst]) <<  "\n";
		//cout << ans << " " << lst << "\n";
		if(lst < 0){
			set<ii>::iterator it2;
			if(mp2[it] && (it > (-oo + l))){
				ans++;
				it2 = mls.lower_bound({-oo + l + 1, -oo});
				if(it2 == mls.end()) break;
				lst = (*it2).se;
				//lst = it;
			}
			else{
				it2 = mls.lower_bound({-oo + l + 1, -oo});
				if(it2 == mls.end()) break;
				ans++;
				lst = (*it2).se;
			}
		}
		else if(all(arr[lst])){
			set<ii>::iterator it2 = mls.lower_bound({arr[lst] + l + 1, -oo});
			if(it2 == mls.end()) break;
			ans++;
			lst = (*it2).se;
		}
		else{
			for(int i = 8; i >= 0; i--){
			//	cout << i << " " << nxt[lst][i].fi << " " << nxt[lst][i].se << " " << it << "\n";
				if(nxt[lst][i].fi >= it) continue;
				//if(!ck) continue;
				while(nxt[lst][i].fi < it){
					ans += (1 << i);
				//	assert(arr[nxt[lst][i].se] == nxt[lst][i].fi);
					lst = nxt[lst][i].se;
				}
				//cout << lst << " " << ans << "\n";
			}
		//	cout << counter << " " << lst << " " << ans << "\n";
		//cout << ans << " " << lst << " " << arr[lst] << " " << it << "\n";
			//set<ii>::iterator it2 = mls.lower_bound({it, -oo});
			//cout << arr[lst] + l << " " << ans << "\n";
			set<ii>::iterator it2;
			if(mp1[it] && (it > (arr[lst] + l))){
				ans++;
				it2 = mls.lower_bound({it + l + 1, -oo});
			//	cout << it + l + 1 << " " << (it2 == mls.end()) << "\n";
				if(it2 == mls.end()) break;
				ans++;
				//cout << "OK " << it << " " << it + l + 1 << " " << (*it2).se << "\n";
				lst = (*it2).se;
				//lst = it;
			}
			else{
		//		cout << "OKAY\n";
				it2 = mls.lower_bound({arr[lst] + l + 1, -oo});
			//	cout << arr[lst] + l + 1 << " " << (it2 == mls.end()) << "\n";
		//		cout << (it2 == mls.end()) << "\n";
				if(it2 == mls.end()) break;
				ans++;
			//	cout << "OK " << arr[lst] + l + 1 << " " << (*it2).se << "\n";
				lst = (*it2).se;
			}
		//	cout << ans << "\n";
			//cout << lst << "\n";
		}
		ck = 1;
	}
	//cnt++;
	//if(!(cnt % 1000)) cout << cnt << " " << "OK " << (double)clock() / (double)CLOCKS_PER_SEC << "\n";
	if(!(counter % 30)){
		poss.clear();
		mp2.clear();
		ins.clear();
		rebuild();
		poss.insert(-1), poss.insert(1e9 + 1);
	}
	return ans;
}
 
/*
void process(){
 
}
 
signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	ll t;
	cin >> t;
	while(t--) process();
}
*/

Compilation message

elephants.cpp: In function 'int update(int, int)':
elephants.cpp:109:7: warning: variable 'ck' set but not used [-Wunused-but-set-variable]
  109 |  bool ck = 1;
      |       ^~
In file included from /usr/include/c++/10/map:60,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:81,
                 from elephants.cpp:2:
/usr/include/c++/10/bits/stl_tree.h: In instantiation of 'static const _Key& std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_S_key(std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Const_Link_type) [with _Key = std::pair<int, int>; _Val = std::pair<int, int>; _KeyOfValue = std::_Identity<std::pair<int, int> >; _Compare = cmp; _Alloc = std::allocator<std::pair<int, int> >; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Const_Link_type = const std::_Rb_tree_node<std::pair<int, int> >*]':
/usr/include/c++/10/bits/stl_tree.h:2101:47:   required from 'std::pair<std::_Rb_tree_node_base*, std::_Rb_tree_node_base*> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_get_insert_unique_pos(const key_type&) [with _Key = std::pair<int, int>; _Val = std::pair<int, int>; _KeyOfValue = std::_Identity<std::pair<int, int> >; _Compare = cmp; _Alloc = std::allocator<std::pair<int, int> >; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::key_type = std::pair<int, int>]'
/usr/include/c++/10/bits/stl_tree.h:2154:4:   required from 'std::pair<std::_Rb_tree_iterator<_Val>, bool> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_unique(_Arg&&) [with _Arg = std::pair<int, int>; _Key = std::pair<int, int>; _Val = std::pair<int, int>; _KeyOfValue = std::_Identity<std::pair<int, int> >; _Compare = cmp; _Alloc = std::allocator<std::pair<int, int> >]'
/usr/include/c++/10/bits/stl_set.h:521:25:   required from 'std::pair<typename std::_Rb_tree<_Key, _Key, std::_Identity<_Tp>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator, bool> std::set<_Key, _Compare, _Alloc>::insert(std::set<_Key, _Compare, _Alloc>::value_type&&) [with _Key = std::pair<int, int>; _Compare = cmp; _Alloc = std::allocator<std::pair<int, int> >; typename std::_Rb_tree<_Key, _Key, std::_Identity<_Tp>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator = std::_Rb_tree<std::pair<int, int>, std::pair<int, int>, std::_Identity<std::pair<int, int> >, cmp, std::allocator<std::pair<int, int> > >::const_iterator; std::set<_Key, _Compare, _Alloc>::value_type = std::pair<int, int>]'
elephants.cpp:81:50:   required from here
/usr/include/c++/10/bits/stl_tree.h:780:8: error: static assertion failed: comparison object must be invocable as const
  780 |        is_invocable_v<const _Compare&, const _Key&, const _Key&>,
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~