oj.uz

Submission #785388

# Submission time Handle Problem Language Result Execution time Memory
785388 2023-07-17T08:49:04 Z vjudge1 Radio Towers (IOI22_towers) C++17
18 / 100
 828 ms 23352 KB 
#include "towers.h"
#include<bits/stdc++.h>
using namespace std;

#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

//#define int long long
 
typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;

const int mxn = 1e5 + 10, inf = 2e9 + 10;
int h[mxn], n, lg[mxn], L[mxn], R[mxn], pre[mxn], pos;
pair<int, int> p[mxn][20];
bool sub1;

pair<int, int> get(int l, int r) {
	int k = lg[r - l + 1];
	return max(p[l][k], p[r - (1 << k) + 1][k]);
}

void build(int l, int r) {
	if(l > r) return;
	int pos = get(l, r).ss;
	L[pos] = l;
	R[pos] = r;
	if(l == r) return;
	pre[pos] = 1;
	build(l, pos - 1);
	build(pos + 1, r);
}

void init(int _n, vector<int> H) {
	n = _n;
	for(int i = 1; i <= n; i++) {
		h[i] = H[i - 1];
		p[i][0] = {h[i], i};
	}
	for(int j = 1; j < 20; j++) {
		for(int i = 1; i + (1 << j) - 1 <= n; i++) {
			p[i][j] = max(p[i][j - 1], p[i + (1 << (j - 1))][j - 1]);
		}
	}
	for(int i = 2; i <= n; i++) {
		lg[i] = lg[i / 2] + 1;
	}
	build(1, n);
	for(int i = 1; i <= n; i++) {
		pre[i] += pre[i - 1];
	}
	sub1 = 1;
	pos = get(1, n).ss;
	for(int i = 1; i <= n; i++) {
		if(L[i] < i && R[i] > i && (L[i] > 1 || R[i] < n)) sub1 = 0;
	}
}

int max_towers(int l, int r, int D) {
	l++;
	r++;
	if(l == r) return 1;
	if(sub1) {
		return 1 + (l < pos && r > pos && max(h[l], h[r]) <= h[pos] - D);
	}
	int ans = r - l + 1 - pre[r] + pre[l - 1];
	if(pre[l] - pre[l - 1] == 1 && R[l] == l) ans++;
	if(pre[r] - pre[r - 1] == 1 && L[r] == r) ans++;
	return ans;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 302 ms 13520 KB Output is correct
2 Correct 579 ms 23088 KB Output is correct
3 Correct 828 ms 23112 KB Output is correct
4 Correct 641 ms 23268 KB Output is correct
5 Correct 519 ms 18600 KB Output is correct
6 Correct 628 ms 23228 KB Output is correct
7 Correct 548 ms 18596 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 640 KB Output is correct
10 Correct 1 ms 592 KB Output is correct

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 336 KB 1st lines differ - on the 1st token, expected: '13', found: '16'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 336 KB 1st lines differ - on the 1st token, expected: '13', found: '16'
2 Halted 0 ms 0 KB -

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 564 ms 18540 KB Output is correct
2 Correct 624 ms 18660 KB Output is correct
3 Correct 552 ms 18708 KB Output is correct
4 Correct 777 ms 18656 KB Output is correct
5 Correct 563 ms 18680 KB Output is correct
6 Correct 599 ms 18624 KB Output is correct
7 Correct 642 ms 18576 KB Output is correct
8 Correct 442 ms 23352 KB Output is correct
9 Correct 658 ms 18612 KB Output is correct
10 Correct 724 ms 22128 KB Output is correct
11 Correct 742 ms 18632 KB Output is correct
12 Correct 719 ms 23336 KB Output is correct
13 Correct 611 ms 18660 KB Output is correct
14 Correct 0 ms 208 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 1 ms 592 KB Output is correct
17 Correct 27 ms 18568 KB Output is correct
18 Correct 26 ms 18616 KB Output is correct
19 Correct 28 ms 18672 KB Output is correct
20 Correct 30 ms 18632 KB Output is correct
21 Correct 26 ms 23204 KB Output is correct
22 Correct 27 ms 18616 KB Output is correct
23 Correct 24 ms 18600 KB Output is correct
24 Correct 25 ms 18680 KB Output is correct
25 Correct 24 ms 18632 KB Output is correct
26 Correct 26 ms 22816 KB Output is correct
27 Correct 1 ms 592 KB Output is correct
28 Correct 1 ms 592 KB Output is correct
29 Correct 1 ms 592 KB Output is correct
30 Correct 1 ms 592 KB Output is correct
31 Correct 1 ms 720 KB Output is correct
32 Correct 1 ms 592 KB Output is correct
33 Correct 1 ms 592 KB Output is correct
34 Correct 1 ms 592 KB Output is correct
35 Correct 1 ms 592 KB Output is correct
36 Correct 1 ms 720 KB Output is correct

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 194 ms 4688 KB 1st lines differ - on the 1st token, expected: '7197', found: '8004'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 336 KB 1st lines differ - on the 1st token, expected: '13', found: '16'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 302 ms 13520 KB Output is correct
2 Correct 579 ms 23088 KB Output is correct
3 Correct 828 ms 23112 KB Output is correct
4 Correct 641 ms 23268 KB Output is correct
5 Correct 519 ms 18600 KB Output is correct
6 Correct 628 ms 23228 KB Output is correct
7 Correct 548 ms 18596 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 640 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Incorrect 0 ms 336 KB 1st lines differ - on the 1st token, expected: '13', found: '16'
12 Halted 0 ms 0 KB -