oj.uz

답안 #520031

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
520031 2022-01-28T07:44:57 Z akhan42 Bubble Sort 2 (JOI18_bubblesort2) C++17
17 / 100
 9000 ms 5312 KB 
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
//using namespace __gnu_pbds;

#define F first
#define S second
#define forn(i, n) for(int i = 0; i < n; ++i)
#define forbn(i, b, n) for(int i = b; i < n; ++i)
#define sz(v) (int)v.size()
#define pb push_back
#define eb emplace_back
#define all(v) v.begin(), v.end()

typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef long long ll;
//typedef tree<ii, null_type, less<ii>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

template <class T> inline void mineq(T &a, T b) { a = min(a, b); }
template <class T> inline void maxeq(T &a, T b) { a = max(a, b); }


const int INF = 1000 * 1000;


struct Seg {
	int n;
	vi add, mx;

	Seg(int n, vi &vals): n(n) {
		add.assign(4 * n, 0);
		mx.assign(4 * n, 0);

		build(vals);
	}

	void propagate(int v, int tl, int tr) {
		if(tl == tr || add[v] == 0)
			return;

		add[2 * v] += add[v];
		add[2 * v + 1] += add[v];
		mx[2 * v] += add[v];
		mx[2 * v + 1] += add[v];
		add[v] = 0;
	}

	void pull(int v) {
		mx[v] = max(mx[2 * v], mx[2 * v + 1]);
	}

	void build(vi &vals, int v = 1, int tl = 0, int tr = -1) {
		if(tr == -1) tr = n - 1;

		if(tl == tr) {
			mx[v] = vals[tl];
			return;
		}
		int tm = (tl + tr) / 2;

		build(vals, 2 * v, tl, tm);
		build(vals, 2 * v + 1, tm + 1, tr);

		pull(v);
	}

	void update(int l, int r, int val, int v = 1, int tl = 0, int tr = -1) {
		if(tr == -1) tr = n - 1;
		propagate(v, tl, tr);
		if(l > r) return;

		if(tl == l && r == tr) {
			add[v] = val;
			mx[v] += val;
			return;
		}
		int tm = (tl + tr) / 2;

		update(l, min(r, tm), val, 2 * v, tl, tm);
		update(max(l, tm + 1), r, val, 2 * v + 1, tm + 1, tr);

		pull(v);
	}

	int query(int l, int r, int v = 1, int tl = 0, int tr = -1) {
		if(tr == -1) tr = n - 1;
		propagate(v, tl, tr);
		if(l > r) return -INF;

		if(tl == l && r == tr)
			return mx[v];
		int tm = (tl + tr) / 2;

		int ql = query(l, min(r, tm), 2 * v, tl, tm);
		int qr = query(max(l, tm + 1), r, 2 * v + 1, tm + 1, tr);

		return max(ql, qr);
	}

	int get_max() {
		return query(0, n - 1);
	}

	int at(int p) {
		return query(p, p);
	}

	void set(int p, int nval) {
		update(p, p, nval - at(p));
	}
};


struct Seg2 {
	int n;
	vi t;

	Seg2(int n): n(n) {
		t.resize(2 * n);
	}

	void set(int p, int val) {
		for(t[p += n] = val; p > 1; p /= 2)
			t[p >> 1] = t[p] + t[p ^ 1];
	}

	int sum(int l, int r) {
		int res = 0;
		for(l += n, r += n + 1; l < r; l /= 2, r /= 2) {
			if(l & 1) res += t[l++];
			if(r & 1) res += t[--r];
		}
		return res;
	}

	int at(int p) {
		return sum(0, p) - sum(0, p - 1);
	}
};


vi countScans(vi a, vi xs, vi vs) {
	int n = sz(a);
	int q = sz(xs);

	set<ii> s;
	vii vals;

	forn(i, n) {
		s.insert({a[i], i});
		vals.eb(a[i], i);
	}
	forn(i, q) {
		s.insert({vs[i], xs[i]});
	}
	map<ii, int> p2ind;
	int ct = 0;
	for(ii el: s) {
		p2ind[el] = ct++;
	}

	int N = sz(s);

	sort(all(vals));

	vi seg_vals(N, -INF);
	Seg2 sl(N);

	forn(i, n) {
		int ind = p2ind[vals[i]];
		seg_vals[ind] = vals[i].S - i;
		sl.set(ind, 1);
	}

	Seg seg(N, seg_vals);
	vi ans(q);

	forn(i, q) {
		int x = xs[i], v = vs[i];

		int ind_fr = p2ind[{a[x], x}];
		int ind_to = p2ind[{v, x}];

		sl.set(ind_fr, 0);
		sl.set(ind_to, 1);

		if(ind_to > ind_fr) {
			seg.update(ind_fr, ind_to, 1);
		}
		if(ind_to < ind_fr) {
			seg.update(ind_to, ind_fr, -1);
		}

		if(ind_to != ind_fr) {
			int rem = x - sl.sum(0, ind_to - 1);
			seg.set(ind_fr, -INF);
			seg.set(ind_to, rem);
		}

		a[x] = v;
		ans[i] = seg.get_max();

		int mx = -1000;
		forn(x, n) {
			int ind = p2ind[{a[x], x}];
			maxeq(mx, x - sl.sum(0, ind - 1));
//			cout << ind << ' ' << sl.sum(0, ind - 1) << endl;
		}
		ans[i] = mx;
	}

	return ans;
}


void solve() {
	int n, q;
	cin >> n >> q;
	vi a(n);
	forn(i, n)
		cin >> a[i];

	vi xs, vs;
	forn(_, q) {
		int x, v;
		cin >> x >> v;
		xs.pb(x);
		vs.pb(v);
	}

	vi ans = countScans(a, xs, vs);

	for(int a: ans)
		cout << a << endl;

}



//int main() {
//	ios_base::sync_with_stdio(false);
//	cin.tie(nullptr);
////	cout.tie(nullptr);
//
////	freopen("optmilk.in", "r", stdin);
////	freopen("optmilk.out", "w", stdout);
//
//	int t = 1;
////	cin >> t;
//	while(t--) {
//		solve();
//	}
//}

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 456 KB Output is correct
2 Correct 83 ms 592 KB Output is correct
3 Correct 612 ms 996 KB Output is correct
4 Correct 626 ms 996 KB Output is correct
5 Correct 591 ms 1000 KB Output is correct
6 Correct 418 ms 1008 KB Output is correct
7 Correct 486 ms 996 KB Output is correct
8 Correct 533 ms 1008 KB Output is correct
9 Correct 590 ms 1008 KB Output is correct
10 Correct 468 ms 912 KB Output is correct
11 Correct 459 ms 908 KB Output is correct
12 Correct 455 ms 964 KB Output is correct
13 Correct 459 ms 872 KB Output is correct
14 Correct 455 ms 876 KB Output is correct
15 Correct 458 ms 904 KB Output is correct
16 Correct 463 ms 844 KB Output is correct
17 Correct 466 ms 844 KB Output is correct
18 Correct 464 ms 844 KB Output is correct

Subtask #2
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 456 KB Output is correct
2 Correct 83 ms 592 KB Output is correct
3 Correct 612 ms 996 KB Output is correct
4 Correct 626 ms 996 KB Output is correct
5 Correct 591 ms 1000 KB Output is correct
6 Correct 418 ms 1008 KB Output is correct
7 Correct 486 ms 996 KB Output is correct
8 Correct 533 ms 1008 KB Output is correct
9 Correct 590 ms 1008 KB Output is correct
10 Correct 468 ms 912 KB Output is correct
11 Correct 459 ms 908 KB Output is correct
12 Correct 455 ms 964 KB Output is correct
13 Correct 459 ms 872 KB Output is correct
14 Correct 455 ms 876 KB Output is correct
15 Correct 458 ms 904 KB Output is correct
16 Correct 463 ms 844 KB Output is correct
17 Correct 466 ms 844 KB Output is correct
18 Correct 464 ms 844 KB Output is correct
19 Execution timed out 9042 ms 2764 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 9067 ms 5312 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 456 KB Output is correct
2 Correct 83 ms 592 KB Output is correct
3 Correct 612 ms 996 KB Output is correct
4 Correct 626 ms 996 KB Output is correct
5 Correct 591 ms 1000 KB Output is correct
6 Correct 418 ms 1008 KB Output is correct
7 Correct 486 ms 996 KB Output is correct
8 Correct 533 ms 1008 KB Output is correct
9 Correct 590 ms 1008 KB Output is correct
10 Correct 468 ms 912 KB Output is correct
11 Correct 459 ms 908 KB Output is correct
12 Correct 455 ms 964 KB Output is correct
13 Correct 459 ms 872 KB Output is correct
14 Correct 455 ms 876 KB Output is correct
15 Correct 458 ms 904 KB Output is correct
16 Correct 463 ms 844 KB Output is correct
17 Correct 466 ms 844 KB Output is correct
18 Correct 464 ms 844 KB Output is correct
19 Execution timed out 9042 ms 2764 KB Time limit exceeded
20 Halted 0 ms 0 KB -