oj.uz

답안 #539272

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
539272 2022-03-18T16:01:44 Z LucaDantas Bubble Sort 2 (JOI18_bubblesort2) C++17
17 / 100
 251 ms 30292 KB 
#include <bits/stdc++.h>
#include "bubblesort2.h"
using namespace std;

constexpr int maxn = 1<<20, B = 2010, inf = 0x3f3f3f3f; // subtasks brutao, mudar

struct SegmentTree {
	int tree[maxn], lazy[maxn], a[maxn];
	void flush(int node, int i, int j) {
		if(!lazy[node]) return;
		if(i != j) {
			lazy[node<<1] += lazy[node];
			lazy[node<<1|1] += lazy[node];
		}
		tree[node] += lazy[node];
		lazy[node] = 0;
	}
	void build(int node, int i, int j) {
		lazy[node] = 0;
		if(i == j) return (void)(tree[node] = a[i]);
		int m = (i+j) >> 1;
		build(node<<1, i, m);
		build(node<<1|1, m+1, j);
		tree[node] = max(tree[node<<1], tree[node<<1|1]);
	}
	void upd(int node, int i, int j, int l, int r, int v) {
		flush(node, i, j);
		if(i > r || j < l) return;
		if(i >= l && j <= r) {
			lazy[node] += v;
			flush(node, i, j);
			return;
		}
		int m = (i+j) >> 1;
		upd(node<<1, i, m, l, r, v);
		upd(node<<1|1, m+1, j, l, r, v);
		tree[node] = max(tree[node<<1], tree[node<<1|1]);
	}
	int query() { return tree[1] + lazy[1]; } // quero o maximo geral mesmo
} seg;

void compress(vector<int>& A, vector<int>& V) {
	map<int,int> mp;
	for(int x : A)
		mp[x] = 0;
	for(int x : V)
		mp[x] = 0;
 
	int coord = 0;
	for(auto& it : mp)
		it.second = ++coord;
 
	for(int& x : A)
		x = mp[x];
	for(int& x : V)
		x = mp[x];
}

struct BIT {
	int bit[maxn];
	void upd(int x, int v) {
		for(; x > 0; x -= x&-x)
			bit[x] += v;
	}
	int query(int x) {
		int ans = 0;
		for(; x < maxn; x += x&-x)
			ans += bit[x];
		return ans;
	}
	void clear() { memset(bit, 0, sizeof bit); }
} bit, bit2;
 
vector<int> pareto;

int DENTRO_NA_QUERY[maxn]; bool foi[maxn];
vector<pair<int,int>> qr[maxn];
int FORA[maxn], DENTRO[maxn], FORA_INI[maxn];

void rebuild(const vector<int>& A) {
	pareto.clear();
	int N = (int)(A.size());
	for(int i = 0; i < N; i++) {
		if(foi[i]) continue;
		while(pareto.size() && A[i] <= A[pareto.back()])
			pareto.pop_back();
		pareto.push_back(i);
	}

	bit.clear();
	for(int i = 0; i < (int)A.size(); i++) {
		while(qr[i].size()) {
			auto [val, id] = qr[i].back();
			qr[i].pop_back();
			DENTRO_NA_QUERY[id] = bit2.query(val+1);
		}

		DENTRO[i] = bit2.query(A[i]+1);

		if(!foi[i]) seg.a[i] = bit.query(A[i]+1);
		else seg.a[i] = -inf;

		bit.upd(A[i], 1);
		if(!foi[i])
			bit2.upd(A[i], 1);
	}
	seg.build(1, 0, N-1);
}

int bs(int x, const vector<int>& A) {
	int l = 0, r = (int)(pareto.size())-1, ans = -1;
	while(l <= r) {
		int m = (l+r) >> 1;
		if(A[pareto[m]] < x)
			ans = pareto[m], l = m+1;
		else
			r = m-1;
	}
	return ans;
}

std::vector<int> countScans(std::vector<int> A,std::vector<int> X,std::vector<int> V){
	int Q = (int)X.size(), N = (int)A.size();
	compress(A, V);

	std::vector<int> answer(Q);
	for(int q = 0; q < Q; q += B) {
		vector<int> special;

		for(int add = 0; add < B && add+q < Q; add++) {
			qr[X[q+add]].push_back({V[q+add], q+add});
			if(foi[X[q+add]]) continue;
			foi[X[q+add]] = 1;
			special.push_back(X[q+add]);
		}

		rebuild(A);

		for(int x : special)
			FORA[x] = 0;
 
		for(int x : special)
			for(int y : special)
				if(x < y && A[x] > A[y]) ++FORA[y];

		/* for(int x : special)
			DENTRO[x] -= FORA[x], FORA_INI[x] = FORA[x]; */

		for(int add = 0; add < B && add+q < Q; add++) {
			int pos = X[q+add], val = V[q+add];

			{
				int last = bs(A[pos], A);
				if(last > pos)
					seg.upd(1, 0, N-1, pos, last, -1);

				for(int x : special) {
					if(pos < x && A[pos] > A[x]) --FORA[x];
					if(x < pos && A[x] > A[pos]) --FORA[pos];
				}
			}

			A[pos] = val;
			DENTRO[pos] = DENTRO_NA_QUERY[q+add];

			/* DENTRO[pos] = 0;
			for(int j = 0; j < pos; j++)
				if(!foi[j] && A[j] > val) DENTRO[pos]++; */

			{
				int last = bs(A[pos], A);
				if(last > pos)
					seg.upd(1, 0, N-1, pos, last, 1);

				for(int x : special) {
					if(pos < x && A[pos] > A[x]) ++FORA[x];
					if(x < pos && A[x] > A[pos]) ++FORA[pos];
				}
			}

			int especiais = 0;
			for(int x : special)
				especiais = max(especiais, DENTRO[x] + FORA[x]);

			answer[q+add] = max(seg.query(), especiais);
		}

		for(int x : special)
			foi[x] = 0;
	}
	return answer;
}

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 29140 KB Output is correct
2 Correct 27 ms 29140 KB Output is correct
3 Correct 67 ms 29504 KB Output is correct
4 Correct 64 ms 29396 KB Output is correct
5 Correct 57 ms 29396 KB Output is correct
6 Correct 28 ms 29420 KB Output is correct
7 Correct 43 ms 29404 KB Output is correct
8 Correct 47 ms 29388 KB Output is correct
9 Correct 59 ms 29300 KB Output is correct
10 Correct 54 ms 29252 KB Output is correct
11 Correct 51 ms 29268 KB Output is correct
12 Correct 49 ms 29380 KB Output is correct
13 Correct 47 ms 29444 KB Output is correct
14 Correct 43 ms 29368 KB Output is correct
15 Correct 49 ms 29368 KB Output is correct
16 Correct 30 ms 29268 KB Output is correct
17 Correct 27 ms 29268 KB Output is correct
18 Correct 30 ms 29284 KB Output is correct

Subtask #2
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 29140 KB Output is correct
2 Correct 27 ms 29140 KB Output is correct
3 Correct 67 ms 29504 KB Output is correct
4 Correct 64 ms 29396 KB Output is correct
5 Correct 57 ms 29396 KB Output is correct
6 Correct 28 ms 29420 KB Output is correct
7 Correct 43 ms 29404 KB Output is correct
8 Correct 47 ms 29388 KB Output is correct
9 Correct 59 ms 29300 KB Output is correct
10 Correct 54 ms 29252 KB Output is correct
11 Correct 51 ms 29268 KB Output is correct
12 Correct 49 ms 29380 KB Output is correct
13 Correct 47 ms 29444 KB Output is correct
14 Correct 43 ms 29368 KB Output is correct
15 Correct 49 ms 29368 KB Output is correct
16 Correct 30 ms 29268 KB Output is correct
17 Correct 27 ms 29268 KB Output is correct
18 Correct 30 ms 29284 KB Output is correct
19 Incorrect 251 ms 30196 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 102 ms 30292 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 29140 KB Output is correct
2 Correct 27 ms 29140 KB Output is correct
3 Correct 67 ms 29504 KB Output is correct
4 Correct 64 ms 29396 KB Output is correct
5 Correct 57 ms 29396 KB Output is correct
6 Correct 28 ms 29420 KB Output is correct
7 Correct 43 ms 29404 KB Output is correct
8 Correct 47 ms 29388 KB Output is correct
9 Correct 59 ms 29300 KB Output is correct
10 Correct 54 ms 29252 KB Output is correct
11 Correct 51 ms 29268 KB Output is correct
12 Correct 49 ms 29380 KB Output is correct
13 Correct 47 ms 29444 KB Output is correct
14 Correct 43 ms 29368 KB Output is correct
15 Correct 49 ms 29368 KB Output is correct
16 Correct 30 ms 29268 KB Output is correct
17 Correct 27 ms 29268 KB Output is correct
18 Correct 30 ms 29284 KB Output is correct
19 Incorrect 251 ms 30196 KB Output isn't correct
20 Halted 0 ms 0 KB -