oj.uz

Submission #748543

# Submission time Handle Problem Language Result Execution time Memory
748543 2023-05-26T12:50:04 Z alex_2008 Radio Towers (IOI22_towers) C++17
17 / 100
 1375 ms 186040 KB 
#include "towers.h"
#include <iostream>
#include <vector>
#include <cmath>
#include <set>
#include <algorithm>
using namespace std;
int ind = -1;
bool ch = true;
vector <int> h;
const int N = 100100, M = 20;
int mx[N][M], Left[N], Right[N], pref[N], LS[N], RS[N];
int mxleft[N][M], mnright[N][M];
struct Node {
	int val;
	int left;
	int right;
	Node* ls;
	Node* rs;
};
Node* roots[N];
int tree[4 * N], maxim[4 * N], minim[4 * N];
int minnumber = 2e9, answer_for_another_tree = 0;
void build_another_tree(int v, int tl, int tr) {
	if (tl == tr) {
		maxim[v] = h[tl];
		minim[v] = h[tl];
		tree[v] = 0;
	}
	else {
		int tm = (tl + tr) / 2;
		build_another_tree(2 * v, tl, tm);
		build_another_tree(2 * v + 1, tm + 1, tr);
		maxim[v] = max({ maxim[2 * v], maxim[2 * v + 1] });
		minim[v] = min({ minim[2 * v], minim[2 * v + 1] });
		tree[v] = max({ tree[2 * v], tree[2 * v + 1], maxim[2 * v + 1] - minim[2 * v] });
	}
}
void query_in_another_tree(int v, int tl, int tr, int l, int r) {
	if (tr < l || tl > r) return;
	if (tl >= l && tr <= r) {
		answer_for_another_tree = max(answer_for_another_tree, tree[v]);
		answer_for_another_tree = max(answer_for_another_tree, maxim[v] - minnumber);
		minnumber = min(minnumber, minim[v]);
		return;
	}
	int tm = (tl + tr) / 2;
	query_in_another_tree(2 * v, tl, tm, l, r);
	query_in_another_tree(2 * v + 1, tm + 1, tr, l, r);
}
void build_tree(Node* v) {
	if (v->left == v->right) {
		v->val = 1;
		return;
	}
	else {
		int tm = (v->left + v->right) / 2;
		Node* ls = new Node{ 0, v->left, tm, nullptr, nullptr };
		Node* rs = new Node{ 0, tm + 1, v->right, nullptr, nullptr };
		build_tree(ls);
		build_tree(rs);
		v->ls = ls;
		v->rs = rs;
		v->val = ls->val + rs->val;
	}
}
void update(Node* old, Node* neww, int pos) {
	*neww = *old;
	if (neww->left > pos || neww->right < pos) return;
	if (neww->left == neww->right) {
		neww->val = 0;
		return;
	}
	int tm = (neww->left + neww->right) / 2;
	Node* ls = new Node{ 0, neww->left, tm, nullptr, nullptr };
	Node* rs = new Node{ 0, tm + 1, neww->right, nullptr, nullptr };
	update(old->ls, ls, pos);
	update(old->rs, rs, pos);
	neww->ls = ls;
	neww->rs = rs;
	neww->val = ls->val + rs->val;
}
int ql = 2e9, qr = -1;
void query1(Node* v, int l) {
	if (v->val == 0) return;
	if (v->right < l) return;
	if (v->left >= l) {
		while (v->left != v->right) {
			if (v->ls->val > 0) {
				v = v->ls;
			}
			else {
				v = v->rs;
			}
		}
		ql = min(ql, v->left);
		return;
	}
	query1(v->ls, l);
	query1(v->rs, l);
}
void query2(Node* v, int r) {
	if (v->val == 0) return;
	if (v->left > r) return;
	if (v->right <= r) {
		while (v->left != v->right) {
			if (v->rs->val > 0) {
				v = v->rs;
			}
			else v = v->ls;
		}
		qr = max(qr, v->left);
		return;
	}
	query2(v->ls, r);
	query2(v->rs, r);
}
int query3(Node* v, int l, int r) {
	if (v->left > r || v->right < l) return 0;
	if (v->left >= l && v->right <= r) return v->val;
	return query3(v->ls, l, r) + 
		query3(v->rs, l, r);
}
vector <pair<int, int>> esim;
vector <int> indexes;
bool check = true;
int findmaxinrange(int L, int R) {
	if (L > R) return 0;
	int u = log2(R - L + 1);
	return max(mx[L][u], mx[R - (1 << u) + 1][u]);
}
int findmininrange(int L, int R) {
	return 1;
}
int findmininrange(int L, int R, int w) {
	if (L > R) return 2e9 + 1;
	int u = log2(R - L + 1);
	if (w == 1) return max(mxleft[L][u], mxleft[R - (1 << u) + 1][u]);
	return min(mnright[L][u], mnright[R - (1 << u) + 1][u]);
}
void init(int n, vector<int> a) {
	ch = true;
	ind = -1;
	h = a;
	pref[0] = 0;
	for (int i = 0; i < n - 1; ++i)
	{
		if (a[i] > a[i + 1]) {
			if (ind == -1) ind = i;
		}
		else {
			if (ind != -1) ch = false;
		}
	}
	LS[0] = -1;
	RS[n - 1] = -1;
	for (int i = 1; i < n; i++) {
		int v = i - 1;
		while (v != -1 && a[i] < a[v]) {
			v = LS[v];
		}
		LS[i] = v;
	}
	for (int i = n - 2; i >= 0; i--) {
		int v = i + 1;
		while (v != -1 && a[i] < a[v]) {
			v = RS[v];
		}
		RS[i] = v;
	}
	for (int i = 1; i < n - 1; i++) {
		pref[i] = pref[i - 1];
		if (a[i] < a[i + 1] && a[i] < a[i - 1]) pref[i]++;
	}
	for (int i = 0; i < n; i++) {
		mx[i][0] = a[i];
	}
	for (int j = 1; j < 20; j++) {
		for (int i = n - 1; i >= 0; i--) {
			mx[i][j] = max(mx[i][j - 1], mx[min(n - 1, i + (1 << (j - 1)))][j - 1]);
		}
	}
	for (int i = 0; i < n; i++) {
		int hmn = 2e9;
		if (LS[i] != -1) {
			hmn = min(hmn, findmaxinrange(LS[i] + 1, i - 1));
		}
		if (RS[i] != -1) {
			hmn = min(hmn, findmaxinrange(i + 1, RS[i] - 1));
		}
		int u = hmn - a[i];
		esim.push_back({ u, i });
	}
	sort(esim.begin(), esim.end());
	roots[0] = new Node{0, 0, n - 1, nullptr, nullptr};
	build_tree(roots[0]);
	for (int i = 1; i < n; i++) {
		roots[i] = new Node{ 0, 0, n - 1, nullptr, nullptr };
		update(roots[i - 1], roots[i], esim[i - 1].second);
	}
	build_another_tree(1, 0, n - 1);
}
int querynumber = 0;
int max_towers(int L, int R, int D) {
	int n = (int)h.size();
	int left = 0, right = n - 1, answ = -1;
	while (left <= right) {
		int mid = (left + right) / 2;
		if (esim[mid].first >= D) {
			answ = mid;
			right = mid - 1;
		}
		else left = mid + 1;
	}
	if (answ == -1) return 1;
	int ans = query3(roots[answ], L, R);
	ql = 2e9;
	qr = -1;
	query1(roots[answ], L);
	query2(roots[answ], R);
	minnumber = 2e9;
	answer_for_another_tree = 0;
	if (ql != 2e9) {
		int left = 0, right = ql - 1, r__ = -1;
		while (left <= right) {
			int mid = (left + right) / 2;
			if (findmaxinrange(mid, ql) - h[L] >= D) {
				r__ = mid;
				left = mid + 1;
			}
			else right = mid - 1;
		}
		if (r__ != -1 && r__ >= L) {
			query_in_another_tree(1, 0, n - 1, L, r__);
			if (answer_for_another_tree >= D) ++ans;
		}
	}
	minnumber = 2e9;
	answer_for_another_tree = 0;
	if (qr != -1) {
		int left = qr + 1, right = n - 1, r__ = -1;
		while (left <= right) {
			int mid = (left + right) / 2;
			if (findmaxinrange(qr, mid) - h[R] >= D) {
				r__ = mid;
				right = mid - 1;
			}
			else left = mid + 1;
		}
		if (r__ != -1 && r__ <= R) {
			query_in_another_tree(1, 0, n - 1, r__, R);
			if (answer_for_another_tree >= D) ++ans;
		}
	}
	if (ans == 0) ++ans;
	return ans;
	//query left = INF, query right = -1
/*
7 1
10 20 60 40 50 30 70
1 5 10
*/
	/*auto it = lower_bound(indexes.begin(), indexes.end(), L);
	int ans = upper_bound(indexes.begin(), indexes.end(), R) - lower_bound(indexes.begin(), indexes.end(), L);
	if (it != indexes.end()) {
		int q = Left[*it];
		if (L < q) {
			if (findmininrange(L, q - 1, 2) < *it) {
				++ans;
			}
		}
	}
	it = upper_bound(indexes.begin(), indexes.end(), R);
	if (it != indexes.begin()) {
		--it;
		int q = Right[*it];
		if (q < R) {
			if (findmininrange(q + 1, R, 1) > *it) {
				++ans;
			}
		}
	}
	if (ans == 0) ++ans;*/
	return ans;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 556 ms 106304 KB 27th lines differ - on the 1st token, expected: '2', found: '1'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 720 KB Output is correct
2 Correct 4 ms 2964 KB Output is correct
3 Correct 4 ms 2896 KB Output is correct
4 Correct 3 ms 2896 KB Output is correct
5 Correct 3 ms 2896 KB Output is correct
6 Correct 3 ms 2896 KB Output is correct
7 Incorrect 4 ms 2896 KB 1st lines differ - on the 1st token, expected: '34', found: '33'
8 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 720 KB Output is correct
2 Correct 4 ms 2964 KB Output is correct
3 Correct 4 ms 2896 KB Output is correct
4 Correct 3 ms 2896 KB Output is correct
5 Correct 3 ms 2896 KB Output is correct
6 Correct 3 ms 2896 KB Output is correct
7 Incorrect 4 ms 2896 KB 1st lines differ - on the 1st token, expected: '34', found: '33'
8 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1375 ms 184664 KB 1st lines differ - on the 1st token, expected: '11903', found: '11902'
2 Halted 0 ms 0 KB -

Subtask #5
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 352 ms 40136 KB Output is correct
2 Correct 1285 ms 185952 KB Output is correct
3 Correct 1037 ms 186040 KB Output is correct
4 Correct 1201 ms 185896 KB Output is correct
5 Correct 1203 ms 185948 KB Output is correct
6 Correct 1200 ms 185916 KB Output is correct
7 Correct 1355 ms 185968 KB Output is correct
8 Correct 1243 ms 185948 KB Output is correct
9 Correct 1204 ms 185892 KB Output is correct
10 Correct 1258 ms 185892 KB Output is correct
11 Correct 912 ms 185916 KB Output is correct
12 Correct 260 ms 185908 KB Output is correct
13 Correct 235 ms 185920 KB Output is correct
14 Correct 247 ms 185940 KB Output is correct
15 Correct 234 ms 185976 KB Output is correct
16 Correct 184 ms 185916 KB Output is correct
17 Correct 232 ms 179356 KB Output is correct
18 Correct 240 ms 186008 KB Output is correct
19 Correct 237 ms 185896 KB Output is correct
20 Correct 253 ms 185896 KB Output is correct
21 Correct 242 ms 185968 KB Output is correct
22 Correct 252 ms 185928 KB Output is correct
23 Correct 288 ms 185980 KB Output is correct
24 Correct 214 ms 185892 KB Output is correct
25 Correct 217 ms 185956 KB Output is correct
26 Correct 198 ms 186012 KB Output is correct
27 Correct 215 ms 185972 KB Output is correct
28 Correct 4 ms 2896 KB Output is correct
29 Correct 4 ms 2896 KB Output is correct
30 Correct 3 ms 2896 KB Output is correct
31 Correct 3 ms 2932 KB Output is correct
32 Correct 3 ms 2896 KB Output is correct
33 Correct 2 ms 1372 KB Output is correct
34 Correct 5 ms 2896 KB Output is correct
35 Correct 3 ms 2896 KB Output is correct
36 Correct 3 ms 2896 KB Output is correct
37 Correct 3 ms 2896 KB Output is correct
38 Correct 3 ms 2896 KB Output is correct
39 Correct 3 ms 2896 KB Output is correct
40 Correct 3 ms 2896 KB Output is correct
41 Correct 4 ms 2896 KB Output is correct
42 Correct 3 ms 2896 KB Output is correct
43 Correct 3 ms 2896 KB Output is correct

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 720 KB Output is correct
2 Correct 4 ms 2964 KB Output is correct
3 Correct 4 ms 2896 KB Output is correct
4 Correct 3 ms 2896 KB Output is correct
5 Correct 3 ms 2896 KB Output is correct
6 Correct 3 ms 2896 KB Output is correct
7 Incorrect 4 ms 2896 KB 1st lines differ - on the 1st token, expected: '34', found: '33'
8 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 556 ms 106304 KB 27th lines differ - on the 1st token, expected: '2', found: '1'
2 Halted 0 ms 0 KB -