oj.uz

Submission #814250

# Submission time Handle Problem Language Result Execution time Memory
814250 2023-08-08T06:34:33 Z LIF Radio Towers (IOI22_towers) C++17
23 / 100
 4000 ms 11664 KB 
#include "towers.h"
#include <vector>
#include <stack>
#include <bits/stdc++.h>
using namespace std;
int n;
pair <int,int> aa[300005];
int b[300005];
int rightD[300005];
int leftD[300005];
void init(int N, std::vector<int> H)
{
	n = N;
	for(int i=0;i<H.size();i++)
	{
		aa[i+1].first = H[i];
		aa[i+1].second = i+1;
		b[i+1] = H[i];
	}
	sort(aa+1,aa+n+1);
	for(int i=N;i>=1;i--)
	{
		rightD[i] = N+1;
		leftD[i] = 0;
	}
	return;
}
int lowbit(int x)
{
	return x & (-x);
}
int su[300005];
void change(int x,int add)
{
	while(x <= n)
	{
		su[x] += add;
		x += lowbit(x);				
	}
}
int query(int x)
{
	int ans = 0;
	while(x > 0)
	{
		ans += su[x];
		x -= lowbit(x);
	}
	return ans;
}
int ask(int l,int r)
{
	return query(r) - query(l-1);
}
int st[200005][22];
int findmax(int l,int r)
{
	if(l > r)return -1e9;
	if(r <= 0 || l >= n+1)return -1e9;
	int xx = log(r-l+1) / log(2);
	
	return max(st[l][xx],st[r-(1<<xx)+1][xx]);
}
int max_towers(int L, int R, int D)
{
	L += 1;R += 1;
	for(int i=1;i<=n;i++)st[i][0] = b[i];
	for(int i=1;i<=20;i++)
	{
		for(int j=1;j+(1<<i)-1 <= n;j++)
		{
			st[j][i] = max(st[j][i-1],st[j + (1<<(i-1))][i-1]);
		//	cout<<j<<" "<<i<<" "<<st[j][i]<<endl;
		}
		
	}

	/*
	for(int i=1;i<=n;i++)
	{
		for(int j=i+1;j<=n;j++)cout<<i<<" "<<j<<" "<<findmax(i,j)<<endl;
	}*/
	for(int i=1;i<=n;i++)
	{
		int l = 1;
		int r = i-1;
		int left = 0;
		int right = n+1;
		while(l<=r)
		{
			int mid = (l+r)>>1;
			//cout<<l<<" "<<r<<" "<<findmax(mid,i-1)<<endl;
			if(findmax(mid,i-1) >= b[i] + D)
			{
				left = mid;
				l = mid + 1;
			}
			else r = mid - 1;
		}
		leftD[i] = left;
		l = i+1;
		r = n;
		while(l <= r)
		{
			int mid = (l+r)>>1;
			if(findmax(i+1,mid) >= b[i] + D)
			{
				right = mid;
				r = mid - 1;
			}
			else l = mid + 1;
		}
		rightD[i] = right;
	}
	//cout<<endl;
	//for(int i=1;i<=n;i++)cout<<leftD[i]<<" "<<rightD[i]<<endl;
	int ans = 0;
	for(int now=1;now<=n;now++)
	{
		int i = aa[now].second;
		if(i < L || i > R)continue;
	//	cout<<i<<" ";
		//if(leftD[i] < L || rightD[i] > R)continue;
		if(ask(leftD[i],i) <= 0 && ask(i,rightD[i]) <= 0)
		{
	//		cout<<i<<endl;
			change(i,1);
			ans++;
		}
	}
 	return ans;
}

Compilation message

towers.cpp: In function 'void init(int, std::vector<int>)':
towers.cpp:14:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for(int i=0;i<H.size();i++)
      |              ~^~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4089 ms 6892 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 2 ms 464 KB Output is correct
7 Correct 1 ms 556 KB Output is correct
8 Correct 1 ms 464 KB Output is correct
9 Correct 1 ms 464 KB Output is correct
10 Correct 2 ms 464 KB Output is correct
11 Correct 2 ms 464 KB Output is correct
12 Correct 0 ms 208 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 2 ms 464 KB Output is correct
17 Correct 2 ms 464 KB Output is correct
18 Correct 2 ms 464 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 2 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 2 ms 464 KB Output is correct
23 Correct 1 ms 464 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 464 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 464 KB Output is correct
31 Correct 1 ms 464 KB Output is correct
32 Correct 1 ms 464 KB Output is correct
33 Correct 2 ms 464 KB Output is correct
34 Correct 2 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 2 ms 464 KB Output is correct
7 Correct 1 ms 556 KB Output is correct
8 Correct 1 ms 464 KB Output is correct
9 Correct 1 ms 464 KB Output is correct
10 Correct 2 ms 464 KB Output is correct
11 Correct 2 ms 464 KB Output is correct
12 Correct 0 ms 208 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 2 ms 464 KB Output is correct
17 Correct 2 ms 464 KB Output is correct
18 Correct 2 ms 464 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 2 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 2 ms 464 KB Output is correct
23 Correct 1 ms 464 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 464 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 464 KB Output is correct
31 Correct 1 ms 464 KB Output is correct
32 Correct 1 ms 464 KB Output is correct
33 Correct 2 ms 464 KB Output is correct
34 Correct 2 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 44 ms 7444 KB Output is correct
37 Correct 99 ms 11400 KB Output is correct
38 Correct 82 ms 11268 KB Output is correct
39 Correct 61 ms 11396 KB Output is correct
40 Correct 76 ms 11264 KB Output is correct
41 Correct 79 ms 11520 KB Output is correct
42 Correct 88 ms 11268 KB Output is correct
43 Correct 67 ms 11272 KB Output is correct
44 Correct 58 ms 11272 KB Output is correct
45 Correct 56 ms 11276 KB Output is correct
46 Correct 59 ms 11268 KB Output is correct
47 Correct 68 ms 11360 KB Output is correct
48 Correct 64 ms 11268 KB Output is correct
49 Correct 71 ms 11300 KB Output is correct
50 Correct 61 ms 11272 KB Output is correct
51 Correct 65 ms 11304 KB Output is correct
52 Correct 109 ms 11652 KB Output is correct
53 Correct 76 ms 11656 KB Output is correct
54 Correct 87 ms 11652 KB Output is correct
55 Correct 74 ms 11264 KB Output is correct
56 Correct 65 ms 11308 KB Output is correct
57 Correct 95 ms 11168 KB Output is correct
58 Correct 101 ms 11652 KB Output is correct
59 Correct 86 ms 11648 KB Output is correct
60 Correct 88 ms 11660 KB Output is correct
61 Correct 78 ms 11660 KB Output is correct
62 Correct 82 ms 11648 KB Output is correct
63 Correct 76 ms 11664 KB Output is correct
64 Correct 77 ms 11288 KB Output is correct
65 Correct 73 ms 11268 KB Output is correct
66 Correct 68 ms 11276 KB Output is correct
67 Correct 69 ms 11272 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4073 ms 11600 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4088 ms 3096 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 2 ms 464 KB Output is correct
7 Correct 1 ms 556 KB Output is correct
8 Correct 1 ms 464 KB Output is correct
9 Correct 1 ms 464 KB Output is correct
10 Correct 2 ms 464 KB Output is correct
11 Correct 2 ms 464 KB Output is correct
12 Correct 0 ms 208 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 2 ms 464 KB Output is correct
17 Correct 2 ms 464 KB Output is correct
18 Correct 2 ms 464 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 2 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 2 ms 464 KB Output is correct
23 Correct 1 ms 464 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 464 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 464 KB Output is correct
31 Correct 1 ms 464 KB Output is correct
32 Correct 1 ms 464 KB Output is correct
33 Correct 2 ms 464 KB Output is correct
34 Correct 2 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 44 ms 7444 KB Output is correct
37 Correct 99 ms 11400 KB Output is correct
38 Correct 82 ms 11268 KB Output is correct
39 Correct 61 ms 11396 KB Output is correct
40 Correct 76 ms 11264 KB Output is correct
41 Correct 79 ms 11520 KB Output is correct
42 Correct 88 ms 11268 KB Output is correct
43 Correct 67 ms 11272 KB Output is correct
44 Correct 58 ms 11272 KB Output is correct
45 Correct 56 ms 11276 KB Output is correct
46 Correct 59 ms 11268 KB Output is correct
47 Correct 68 ms 11360 KB Output is correct
48 Correct 64 ms 11268 KB Output is correct
49 Correct 71 ms 11300 KB Output is correct
50 Correct 61 ms 11272 KB Output is correct
51 Correct 65 ms 11304 KB Output is correct
52 Correct 109 ms 11652 KB Output is correct
53 Correct 76 ms 11656 KB Output is correct
54 Correct 87 ms 11652 KB Output is correct
55 Correct 74 ms 11264 KB Output is correct
56 Correct 65 ms 11308 KB Output is correct
57 Correct 95 ms 11168 KB Output is correct
58 Correct 101 ms 11652 KB Output is correct
59 Correct 86 ms 11648 KB Output is correct
60 Correct 88 ms 11660 KB Output is correct
61 Correct 78 ms 11660 KB Output is correct
62 Correct 82 ms 11648 KB Output is correct
63 Correct 76 ms 11664 KB Output is correct
64 Correct 77 ms 11288 KB Output is correct
65 Correct 73 ms 11268 KB Output is correct
66 Correct 68 ms 11276 KB Output is correct
67 Correct 69 ms 11272 KB Output is correct
68 Execution timed out 4073 ms 11600 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4089 ms 6892 KB Time limit exceeded
2 Halted 0 ms 0 KB -