oj.uz

Submission #748602

# Submission time Handle Problem Language Result Execution time Memory
748602 2023-05-26T14:55:49 Z alex_2008 Radio Towers (IOI22_towers) C++17
17 / 100
 1430 ms 185660 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;
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], mx[N][M], LS[N], RS[N];
int tree2[4 * N], maxim2[4 * N], minim2[4 * N];
int minnumber = 2e9, answer_for_another_tree = 0, maxnumber = 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], 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_another_tree2(int v, int tl, int tr) {
	if (tl == tr) {
		maxim2[v] = h[tl];
		minim2[v] = h[tl];
		tree2[v] = 0;
	}
	else {
		int tm = (tl + tr) / 2;
		build_another_tree2(2 * v, tl, tm);
		build_another_tree2(2 * v + 1, tm + 1, tr);
		maxim2[v] = max({ maxim2[2 * v], maxim2[2 * v + 1] });
		minim2[v] = min({ minim2[2 * v], minim2[2 * v + 1] });
		tree2[v] = max({ tree2[2 * v], tree2[2 * v + 1], maxim2[2 * v] - minim2[2 * v + 1] });
	}
}
void query_in_another_tree2(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, tree2[v], maxnumber - minim2[v] });
		minnumber = min(minnumber, maxim2[v]);
		return;
	}
	int tm = (tl + tr) / 2;
	query_in_another_tree2(2 * v, tl, tm, l, r);
	query_in_another_tree2(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->right < l) return;
	if (v->left >= l) {
		if (v->val > 0) {
			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->left > r) return;
	if (v->right <= r) {
		if (v->val > 0) {
			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;
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]);
}
void init(int n, vector<int> a) {
	ch = true;
	h = a;
	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 = 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 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 = L, right = ql - 1, r__ = -1;
		while (left <= right) {
			int mid = (left + right) / 2;
			if (findmaxinrange(mid, ql) - h[ql] >= D) {
				r__ = mid;
				left = mid + 1;
			}
			else right = mid - 1;
		}
		if (r__ != -1) {
			query_in_another_tree(1, 0, n - 1, L, r__);
			if (answer_for_another_tree >= D) ++ans;
		}
	}
	maxnumber = 0;
	answer_for_another_tree = 0;
	if (qr != -1) {
		int left = qr + 1, right = R, r__ = -1;
		while (left <= right) {
			int mid = (left + right) / 2;
			if (findmaxinrange(qr, mid) - h[qr] >= D) {
				r__ = mid;
				right = mid - 1;
			}
			else left = mid + 1;
		}
		if (r__ != -1) {
			query_in_another_tree2(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;*/
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 794 ms 106124 KB 12th 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 5 ms 2852 KB Output is correct
3 Correct 4 ms 2896 KB Output is correct
4 Correct 5 ms 2896 KB Output is correct
5 Correct 5 ms 2896 KB Output is correct
6 Correct 3 ms 2896 KB Output is correct
7 Correct 4 ms 2896 KB Output is correct
8 Correct 5 ms 2860 KB Output is correct
9 Correct 3 ms 2896 KB Output is correct
10 Correct 3 ms 2896 KB Output is correct
11 Correct 3 ms 2896 KB Output is correct
12 Incorrect 1 ms 336 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
13 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 5 ms 2852 KB Output is correct
3 Correct 4 ms 2896 KB Output is correct
4 Correct 5 ms 2896 KB Output is correct
5 Correct 5 ms 2896 KB Output is correct
6 Correct 3 ms 2896 KB Output is correct
7 Correct 4 ms 2896 KB Output is correct
8 Correct 5 ms 2860 KB Output is correct
9 Correct 3 ms 2896 KB Output is correct
10 Correct 3 ms 2896 KB Output is correct
11 Correct 3 ms 2896 KB Output is correct
12 Incorrect 1 ms 336 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
13 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1276 ms 184184 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 363 ms 39876 KB Output is correct
2 Correct 1256 ms 185544 KB Output is correct
3 Correct 1182 ms 185636 KB Output is correct
4 Correct 1229 ms 185588 KB Output is correct
5 Correct 1430 ms 185608 KB Output is correct
6 Correct 1398 ms 185600 KB Output is correct
7 Correct 1191 ms 185512 KB Output is correct
8 Correct 1123 ms 185604 KB Output is correct
9 Correct 1096 ms 185500 KB Output is correct
10 Correct 891 ms 185624 KB Output is correct
11 Correct 963 ms 185644 KB Output is correct
12 Correct 227 ms 185504 KB Output is correct
13 Correct 237 ms 185564 KB Output is correct
14 Correct 238 ms 185532 KB Output is correct
15 Correct 181 ms 185660 KB Output is correct
16 Correct 186 ms 185532 KB Output is correct
17 Correct 217 ms 179148 KB Output is correct
18 Correct 229 ms 185492 KB Output is correct
19 Correct 246 ms 185624 KB Output is correct
20 Correct 249 ms 185596 KB Output is correct
21 Correct 235 ms 185632 KB Output is correct
22 Correct 239 ms 185644 KB Output is correct
23 Correct 237 ms 185500 KB Output is correct
24 Correct 183 ms 185560 KB Output is correct
25 Correct 174 ms 185516 KB Output is correct
26 Correct 193 ms 185592 KB Output is correct
27 Correct 183 ms 185516 KB Output is correct
28 Correct 3 ms 2896 KB Output is correct
29 Correct 3 ms 2896 KB Output is correct
30 Correct 3 ms 2896 KB Output is correct
31 Correct 3 ms 2896 KB Output is correct
32 Correct 3 ms 2896 KB Output is correct
33 Correct 2 ms 1360 KB Output is correct
34 Correct 3 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 2908 KB Output is correct
39 Correct 4 ms 2896 KB Output is correct
40 Correct 3 ms 2896 KB Output is correct
41 Correct 3 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 5 ms 2852 KB Output is correct
3 Correct 4 ms 2896 KB Output is correct
4 Correct 5 ms 2896 KB Output is correct
5 Correct 5 ms 2896 KB Output is correct
6 Correct 3 ms 2896 KB Output is correct
7 Correct 4 ms 2896 KB Output is correct
8 Correct 5 ms 2860 KB Output is correct
9 Correct 3 ms 2896 KB Output is correct
10 Correct 3 ms 2896 KB Output is correct
11 Correct 3 ms 2896 KB Output is correct
12 Incorrect 1 ms 336 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
13 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 794 ms 106124 KB 12th lines differ - on the 1st token, expected: '2', found: '1'
2 Halted 0 ms 0 KB -