제출 #1006340

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1006340		PoPularPlusPlus	Cake 3 (JOI19_cake3)	C++17	0 / 100	0 ms	348 KiB

cake3

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb(x) push_back(x)
#define mp(x,y) make_pair(x,y)
#define all(x) x.begin(),x.end()
#define vf first 
#define vs second
const int mod = 1000000007;
 
mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());
 
const int N = 200004;
int n , m;
vector<pair<ll,ll>> arr;
ll ans;
 
bool cmp(pair<int,int> a , pair<int,int> b){
	if(a.vs == b.vs)return a.vf > b.vf;
	return a.vs < b.vs;
}
 
struct item {
	vector<int> left , right;
};
 
/*void unite(vector<int>& a , vector<int>& b){
	vector<int> v;
	for(int i : a)v.pb(i);
	for(int i : b)v.pb(i);
 
	if(v.size() < m){
		return;
	}

	cout << "printing v\n";
	for(int i : v)cout << i << ' ';
	cout << '\n';
	cout << "printing v completed\n";
 
	bool vis[v.size()];
	memset(vis,0,sizeof vis);
	int j = 0;
	int last = 1;
	set<pair<ll,int>> s;
	ll res = 0;
	ll tp[v.size()];
	for(int i = 1; i < m; i++){
		res += arr[v[i]].vf;
		s.insert(mp(arr[v[i]].vf , i));
		tp[i] = arr[v[i]].vf;
	}
	res -= 2*(arr[v[m-1]].vs - arr[v[0]].vs);
	res += arr[v[0]].vf;
	ans = max(ans , res);
	cout << res << '\n';
	s.insert(mp(arr[v[0]].vf - 2*(arr[v[last]].vs - arr[v[j]].vs) , 0));
	tp[0] = arr[v[0]].vf - 2*(arr[v[last]].vs - arr[v[j]].vs);
	for(int i = m; i < v.size(); i++){
		res -= 2*(arr[v[i]].vs - arr[v[i-1]].vs);
		ll val = arr[v[i]].vf;
		if(val >= ((*s.begin()).vf)){
			pair<ll,int> p = *s.begin();
			s.erase(s.begin());
			//cout << p.vf << ' ';
			res -= p.vf;
			res += val;
			vis[p.vs] = 1;
			s.insert(mp(val, i));
			tp[i] = val;
		}
		else vis[i] = 1;
 
		while(j < v.size() && vis[j]){
			j++;
		}
		last = max(last , j + 1);
		while(last < v.size() && vis[last]){
			last++;
		}
		if(s.count(mp(tp[j] , j))){
			s.erase(mp(tp[j] , j));
			tp[j] = arr[v[j]].vf - 2*(arr[v[last]].vs - arr[v[j]].vs);
			s.insert(mp(tp[j] , j));
		}
		else {
			while(1){
				;
			}
		}
 
		ans = max(ans , res);
		cout << res << '\n';
	}
}*/

void unite(vector<int>& a , vector<int>& b){
	if(a.size() + b.size() < m)return;

	ll left[a.size() + 1] , right[b.size() + 1];
	left[0] = right[0] = 0;

	ll pre[a.size()] , suf[b.size()];
	int idx_pre[a.size()] , idx_suf[b.size()];

	pre[0] = arr[a[0]].vf - 2*(arr[a.back()].vs - arr[a[0]].vs);
	idx_pre[0] = 0;
	suf[b.size()-1] = arr[b.back()].vf - 2*(arr[b.back()].vs - arr[b[0]].vs);
	idx_suf[b.size()-1] = b.size()-1;
	for(int i = 1; i < a.size(); i++){
		ll cur = arr[a[i]].vf - 2*(arr[a.back()].vs - arr[a[i]].vs);
		if(cur > pre[i-1]){
			pre[i] = cur;
			idx_pre[i] = i;
		}
		else {
			pre[i] = pre[i-1];
			idx_pre[i] = idx_pre[i-1];
		}
	}

	for(int i = b.size()-2; i >= 0; i--){
		ll cur = arr[b[i]].vf - 2*(arr[b[i]].vs - arr[b[0]].vs);
		if(cur > suf[i + 1]){
			suf[i] = cur;
			idx_suf[i] = i;
		}
		else {
			suf[i] = suf[i + 1];
			idx_suf[i] = idx_suf[i + 1];
		}
	}

	priority_queue<ll> pq;
	int r = a.size()-1;
	int last = r;
	for(int i = 1; i <= a.size(); i++){
		if(r >= 0){
			if(pq.size() == 0 || pre[r] + 2*(arr[a.back()].vs - arr[a[last]].vs) >= pq.top()){
				left[i] = left[i-1] + pre[r] + 2*(arr[a.back()].vs - arr[a[last]].vs);
				int nr = idx_pre[r];
				for(int j = r; j > nr; j--){
					pq.push(arr[a[j]].vf);
				}
				last = nr;
				r = nr-1;
			}
			else {
				left[i] = left[i-1] + pq.top();
				pq.pop();
			}
		}
		else {
			left[i] = left[i-1] + pq.top();
			pq.pop();
		}
	}

	r = 0;
	last = 0;
	while(pq.size())pq.pop();

	for(int i = 1; i <= b.size(); i++){
		if(r < b.size()){
			if(pq.size() == 0 || suf[r] + 2*(arr[b[last]].vs - arr[b[0]].vs) >= pq.top()){
				right[i] = right[i-1] + suf[r] + 2*(arr[b[last]].vs - arr[b[0]].vs);
				int nr = idx_suf[r];
				for(int j = r; j < nr; j++){
					pq.push(arr[b[j]].vf);
				}
				last = nr;
				r = nr + 1;
			}
			else {
				right[i] = right[i-1] + pq.top();
				pq.pop();
			}
		}
		else {
			right[i] = right[i-1] + pq.top();
			pq.pop();
		}
	}

	ll dif = 2*(arr[b[0]].vs - arr[a.back()].vs);

	/*for(int i = 0; i <= a.size(); i++){
		cout << left[i] << ' ';
	}
	cout << '\n';
	for(int i = 0; i <= b.size(); i++){
		cout << right[i] << ' ';
	}
	cout << '\n';*/

	for(int i = 1; i <= a.size(); i++){
		if(m - i <= b.size()){
			//cout << left[i] << ' ' << right[m-i] << ' ' << dif << '\n';
			ans = max(ans , left[i] + right[m-i] - dif);
		}
	}
	//cout << '\n';
}
 
vector<int> left_merge(vector<int>& a , vector<int>& b , bool rev){
	vector<int> v;
	for(int i : a)v.pb(i);
	for(int i : b)v.pb(i);
 
	if(v.size() <= m){
		return v;
	}

	if(rev)reverse(all(v));
 
	priority_queue<pair<int,int>,vector<pair<int,int>> , greater<pair<int,int>> > pq;
 
	ll res = 0;
	for(int i = 0; i < m; i++){
		res += arr[v[i]].vf;
		pq.push(mp(arr[v[i]].vf , i));
		if(i){
			res -= 2*abs(arr[v[i]].vs - arr[v[i-1]].vs);
		}
	}
 
	ll best[v.size()];
	best[m-1] = res;
 
	for(int i = m; i < v.size(); i++){
		res -= 2*abs(arr[v[i]].vs - arr[v[i-1]].vs);
		if(pq.top().vf < arr[v[i]].vf){
			res -= pq.top().vf;
			pq.pop();
			pq.push(mp(arr[v[i]].vf , i));
			res += arr[v[i]].vf;
		}
 
		best[i] = res;
	}
 
	int pos = m-1;
	res = best[m-1];
	for(int i = m; i < v.size(); i++){
		if(best[i] > res){
			pos = i;
			res = best[i];
		}
	}

	/*cout << "printing best\n";
	for(int i = m - 1; i < v.size(); i++){
		cout << best[i] << ' ';
	}
	cout << '\n';
	cout << "printing best completed\n";*/
 
	while(pq.size())pq.pop();
 
	for(int i = 0; i < m; i++){
		pq.push(mp(arr[v[i]].vf , v[i]));
	}
	for(int i = m; i <= pos; i++){
		if(pq.top().vf < arr[v[i]].vf){
			pq.pop();
			pq.push(mp(arr[v[i]].vf , v[i]));
		}
	}
 
	vector<int> toreturn;
	while(pq.size()){
		toreturn.pb(pq.top().vs);
		pq.pop();
	}
 
	sort(all(toreturn));
 
	return toreturn;
}
 
item merge(item a , item b){
	unite(a.right , b.left);
 
	vector<int> left = left_merge(a.left , b.left , 0);
	vector<int> right = left_merge(a.right , b.right , 1);
 
 	/*cout << "printing left\n";
 
	for(int i : left){
		cout << i << ' ';
	}
	cout << '\n';
	cout << "printing right\n";
	for(int i : right){
		cout << i << ' ';
	}
	cout << '\n';*/
 
	return {left , right};
}
 
item dnc(int l , int r){
	//cout << "came" << endl; 
 
	if(l == r){
		return {{l} , {l}};
	}
 
	int m = (l + r)/2;
 
	item a = dnc(l , m);
	item b = dnc(m + 1 , r);
 
	//cout << l << ' ' << r << '\n';
 
	return merge(a , b);
}	
 
void solve(){
	cin >> n >> m;
	for(int i = 0; i < n; i++){
		int x , y;
		cin >> x >> y;
		arr.pb(mp(x,y));
	}
 
	sort(all(arr),cmp);
	/*for(int i = 0; i < n; i++){
		cout << arr[i].vf << ' ' << arr[i].vs << '\n';
	}
	cout << "array printing completed\n";*/
	ans = -1e9;
	dnc(0,n-1);
	cout << ans << '\n';
}
 
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	//int t;
	//cin >> t;
	//while(t--)
		solve();
}

컴파일 시 표준 에러 (stderr) 메시지

cake3.cpp: In function 'void unite(std::vector<int>&, std::vector<int>&)':
cake3.cpp:98:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   98 |  if(a.size() + b.size() < m)return;
      |     ~~~~~~~~~~~~~~~~~~~~^~~
cake3.cpp:110:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  110 |  for(int i = 1; i < a.size(); i++){
      |                 ~~^~~~~~~~~~
cake3.cpp:137:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  137 |  for(int i = 1; i <= a.size(); i++){
      |                 ~~^~~~~~~~~~~
cake3.cpp:163:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  163 |  for(int i = 1; i <= b.size(); i++){
      |                 ~~^~~~~~~~~~~
cake3.cpp:164:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  164 |   if(r < b.size()){
      |      ~~^~~~~~~~~~
cake3.cpp:196:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  196 |  for(int i = 1; i <= a.size(); i++){
      |                 ~~^~~~~~~~~~~
cake3.cpp:197:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  197 |   if(m - i <= b.size()){
      |      ~~~~~~^~~~~~~~~~~
cake3.cpp: In function 'std::vector<int> left_merge(std::vector<int>&, std::vector<int>&, bool)':
cake3.cpp:210:14: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  210 |  if(v.size() <= m){
      |     ~~~~~~~~~^~~~
cake3.cpp:230:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  230 |  for(int i = m; i < v.size(); i++){
      |                 ~~^~~~~~~~~~
cake3.cpp:244:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  244 |  for(int i = m; i < v.size(); i++){
      |                 ~~^~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 19
• Subtask 3: 0 / 76