Submission #1268261

#	Time	Username	Problem	Language	Result	Execution time	Memory
1268261		MisterReaper	Bubble Sort 2 (JOI18_bubblesort2)	C++20	38 / 100	9093 ms	1448 KiB

bubblesort2

#include "bubblesort2.h"
#include <bits/stdc++.h>

using i64 = long long;

#ifdef DEBUG 
    #include "/home/ahmetalp/Desktop/Workplace/debug.h"
#else
    #define debug(...) void(23)
#endif

struct fenwick {
	int n;
	std::vector<int> tree;
	fenwick() {}
	fenwick(int n_) {
		init(n_);
	}
	void init(int n_) {
		n = n_;
		tree.assign(n + 1, 0);
	}
	void modify(int p, int x) {
		for (p += 1; p <= n; p += p & -p) {
			tree[p] += x;
		}
	}
	int get(int p) {
		int res = 0;
		for (p += 1; p; p -= p & -p) {
			res += tree[p];
		}
		return res;
	}
};

std::vector<int> countScans(std::vector<int> A, std::vector<int> X, std::vector<int> V){
	std::vector<int> ids(A.begin(), A.end());
	ids.insert(ids.end(), V.begin(), V.end());
	std::sort(ids.begin(), ids.end());
	int n;
	ids.resize(n = int(std::unique(ids.begin(), ids.end()) - ids.begin()));
	fenwick fen;

	int N = int(A.size());
	int Q = int(X.size());

	for (int i = 0; i < N; ++i) {
		A[i] = int(std::lower_bound(ids.begin(), ids.end(), A[i]) - ids.begin());
	}
	for (int i = 0; i < Q; ++i) {
		V[i] = int(std::lower_bound(ids.begin(), ids.end(), V[i]) - ids.begin());
	}

	std::vector<int> ans(Q);
	for (int i = 0; i < Q; ++i) {
		fen.init(n);
		A[X[i]] = V[i];
		int& res = ans[i];
		for (int j = 0; j < N; ++j) {
			int x = j - fen.get(A[j]);
			res = std::max(res, x);
			fen.modify(A[j], +1);
		}
	}

	return ans;
}

• Subtask 1: 17 / 17
• Subtask 2: 21 / 21
• Subtask 3: 0 / 22
• Subtask 4: 0 / 40