oj.uz

Submission #1082260

# Submission time Handle Problem Language Result Execution time Memory
1082260 2024-08-31T01:52:27 Z s_tree Radio Towers (IOI22_towers) C++17
37 / 100
 4000 ms 12932 KB 
#include "towers.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5+10;
int root = 0;
int par[N];
int L[N], R[N], mn[N];

struct ST {
	vector<pair<int,int>> t;
	int n;
	ST(){}
	ST(vector<int>&h) {
		n  = h.size();
		t.resize(2*n);
		for(int i = 0;i<n;i++)t[i+n] = {h[i], i};
		for(int i = n-1;i>0;i--)t[i] = max(t[2*i], t[2*i+1]);
	}
	int query(int l, int r) {
		l+=n,r+=n+1;
		pair<int,int> ans = {-1, -1};	
		for(;l<r;l>>=1,r>>=1) {
			if(l&1)ans = max(ans, t[l++]);
			if(r&1)ans = max(ans, t[--r]);
		}
		return ans.second;
	}
};
struct ST2 {
	vector<int> t;
	int n;
	ST2(){}
	ST2(vector<int>&h) {
		n  = h.size();
		t.resize(2*n);
		for(int i = 0;i<n;i++)t[i+n] = h[i];
		for(int i = n-1;i>0;i--)t[i] = min(t[2*i], t[2*i+1]);
	}
	int query(int l, int r) {
		l+=n,r+=n+1;
		int ans = 2e9;
		for(;l<r;l>>=1,r>>=1) {
			if(l&1)ans = min(ans, t[l++]);
			if(r&1)ans = min(ans, t[--r]);
		}
		return ans;
	}
};
struct ST3 {
	vector<vector<int>> t;
	int n;
	ST3(){}
	ST3(vector<vector<int>>&h) {
		n  = h.size();
		t.resize(2*n);
		for(int i = 0;i<n;i++){
			t[i+n]=h[i];
			sort(t[i+n].begin(), t[i+n].end());
		}
		for(int i = n-1;i>0;i--){
				merge(t[2*i].begin(), t[2*i].end(), t[2*i+1].begin(), t[2*i+1].end(), back_inserter(t[i]));
		}
	}
	int query(int l, int r, int key) {
		l+=n,r+=n+1;
		int ans=0;
		for(;l<r;l>>=1,r>>=1) {
			if(l&1) {
				ans+=upper_bound(t[l].begin(), t[l].end(), key) - t[l].begin();
				l++;
			}
			if(r&1) {
				--r;
				ans+=upper_bound(t[r].begin(), t[r].end(), key) - t[r].begin();
			}
		}
		return ans;
	}
};
vector<int> H;
ST st;
ST2 st2;
ST3 st3;
int pref[N+1];
int build(int l, int r) {
	if(r < l)return -1;
	int p = st.query(l, r);
	L[p] = build(l, p-1);
	R[p] = build(p+1, r);
	mn[p] = H[p];
	if(L[p]!=-1)mn[p] = min(mn[p], mn[L[p]]);
	if(R[p]!=-1)mn[p] = min(mn[p], mn[R[p]]);
	return p;
}
void init(int n, std::vector<int> h) {
	st = ST(h);
	st2 = ST2(h);
	H = h;
	root = build(0, n-1);
	for(int i = 0;i<n;i++) {
		bool check=1;
		if(i and H[i-1] < H[i])check=false;
		if(i+1 < n and H[i+1] < H[i])check=false;
		if(i)pref[i] =pref[i-1];
		pref[i]+=check;
	}
}


int query(int v, int l, int r, int MX, int D) {
	if(l > r)return 0;
	if(v == -1)return 0;
	if(v > r) {
		return query(L[v], l, r, MX, D);
	}
	if(v < l)
		return query(R[v], l, r, MX, D);
	int ans = 0;	
	if(st2.query(l, r) <= MX)ans=1;
	ans = max(ans, query(L[v], l, v-1, H[v]-D, D)+query(R[v], v+1, r, H[v]-D, D));
	return ans;
}
int query2(int v, int l, int r) {
	if(l > r)return 0;
	if(v == -1)return 0;
	if(v>r)return query2(L[v], l, r);
	if(v<l)return query2(R[v], l, r);
	int ans=0;
	if(L[v] < l and (R[v] == -1 or R[v] > r))return 1;
	ans+=query2(L[v], l, r);
	ans+=query2(R[v], l, r);
	return ans;
}
int max_towers(int l, int r, int D) {
	if(D == 1) {
		if(l == r)return 1;
		if(l + 1 == r)return 1;
		int ans = pref[r-1]-pref[l];
		if(r and H[r-1] > H[r])ans++;
		if(l+1<H.size() and H[l+1] > H[l])ans++;
		return ans;
	}

  return query(root, l, r, 2e9, D);
}

Compilation message

towers.cpp: In function 'int max_towers(int, int, int)':
towers.cpp:140:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  140 |   if(l+1<H.size() and H[l+1] > H[l])ans++;
      |      ~~~^~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4002 ms 6976 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 600 KB Output is correct
12 Correct 1 ms 372 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 1 ms 600 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 1 ms 600 KB Output is correct
33 Correct 1 ms 600 KB Output is correct
34 Correct 1 ms 600 KB Output is correct
35 Correct 1 ms 600 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 600 KB Output is correct
12 Correct 1 ms 372 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 1 ms 600 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 1 ms 600 KB Output is correct
33 Correct 1 ms 600 KB Output is correct
34 Correct 1 ms 600 KB Output is correct
35 Correct 1 ms 600 KB Output is correct
36 Correct 14 ms 3672 KB Output is correct
37 Correct 14 ms 5464 KB Output is correct
38 Correct 14 ms 5464 KB Output is correct
39 Correct 13 ms 5464 KB Output is correct
40 Correct 12 ms 5320 KB Output is correct
41 Correct 14 ms 5464 KB Output is correct
42 Correct 13 ms 5464 KB Output is correct
43 Correct 25 ms 11576 KB Output is correct
44 Correct 22 ms 11608 KB Output is correct
45 Correct 21 ms 9920 KB Output is correct
46 Correct 19 ms 9444 KB Output is correct
47 Correct 13 ms 5464 KB Output is correct
48 Correct 13 ms 5452 KB Output is correct
49 Correct 12 ms 5400 KB Output is correct
50 Correct 23 ms 11600 KB Output is correct
51 Correct 31 ms 11604 KB Output is correct
52 Correct 21 ms 5456 KB Output is correct
53 Correct 13 ms 5464 KB Output is correct
54 Correct 12 ms 5464 KB Output is correct
55 Correct 27 ms 11592 KB Output is correct
56 Correct 22 ms 11096 KB Output is correct
57 Correct 15 ms 5208 KB Output is correct
58 Correct 23 ms 5300 KB Output is correct
59 Correct 15 ms 5464 KB Output is correct
60 Correct 13 ms 5464 KB Output is correct
61 Correct 14 ms 5464 KB Output is correct
62 Correct 15 ms 5464 KB Output is correct
63 Correct 20 ms 5464 KB Output is correct
64 Correct 30 ms 12932 KB Output is correct
65 Correct 28 ms 12752 KB Output is correct
66 Correct 29 ms 9672 KB Output is correct
67 Correct 29 ms 12496 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 491 ms 5464 KB Output is correct
2 Correct 588 ms 5464 KB Output is correct
3 Correct 639 ms 5464 KB Output is correct
4 Correct 679 ms 5464 KB Output is correct
5 Correct 689 ms 5452 KB Output is correct
6 Correct 607 ms 5464 KB Output is correct
7 Correct 632 ms 5460 KB Output is correct
8 Correct 604 ms 11856 KB Output is correct
9 Correct 690 ms 11776 KB Output is correct
10 Correct 593 ms 10072 KB Output is correct
11 Correct 667 ms 10072 KB Output is correct
12 Correct 645 ms 11608 KB Output is correct
13 Correct 627 ms 11600 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 15 ms 5464 KB Output is correct
18 Correct 12 ms 5360 KB Output is correct
19 Correct 13 ms 5464 KB Output is correct
20 Correct 22 ms 11608 KB Output is correct
21 Correct 30 ms 11596 KB Output is correct
22 Correct 13 ms 5464 KB Output is correct
23 Correct 19 ms 5452 KB Output is correct
24 Correct 12 ms 5464 KB Output is correct
25 Correct 24 ms 11592 KB Output is correct
26 Correct 20 ms 11096 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 0 ms 344 KB Output is correct
30 Correct 1 ms 600 KB Output is correct
31 Correct 1 ms 600 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 600 KB Output is correct
36 Correct 1 ms 600 KB Output is correct

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4038 ms 1624 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 600 KB Output is correct
12 Correct 1 ms 372 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 1 ms 600 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 1 ms 600 KB Output is correct
33 Correct 1 ms 600 KB Output is correct
34 Correct 1 ms 600 KB Output is correct
35 Correct 1 ms 600 KB Output is correct
36 Correct 14 ms 3672 KB Output is correct
37 Correct 14 ms 5464 KB Output is correct
38 Correct 14 ms 5464 KB Output is correct
39 Correct 13 ms 5464 KB Output is correct
40 Correct 12 ms 5320 KB Output is correct
41 Correct 14 ms 5464 KB Output is correct
42 Correct 13 ms 5464 KB Output is correct
43 Correct 25 ms 11576 KB Output is correct
44 Correct 22 ms 11608 KB Output is correct
45 Correct 21 ms 9920 KB Output is correct
46 Correct 19 ms 9444 KB Output is correct
47 Correct 13 ms 5464 KB Output is correct
48 Correct 13 ms 5452 KB Output is correct
49 Correct 12 ms 5400 KB Output is correct
50 Correct 23 ms 11600 KB Output is correct
51 Correct 31 ms 11604 KB Output is correct
52 Correct 21 ms 5456 KB Output is correct
53 Correct 13 ms 5464 KB Output is correct
54 Correct 12 ms 5464 KB Output is correct
55 Correct 27 ms 11592 KB Output is correct
56 Correct 22 ms 11096 KB Output is correct
57 Correct 15 ms 5208 KB Output is correct
58 Correct 23 ms 5300 KB Output is correct
59 Correct 15 ms 5464 KB Output is correct
60 Correct 13 ms 5464 KB Output is correct
61 Correct 14 ms 5464 KB Output is correct
62 Correct 15 ms 5464 KB Output is correct
63 Correct 20 ms 5464 KB Output is correct
64 Correct 30 ms 12932 KB Output is correct
65 Correct 28 ms 12752 KB Output is correct
66 Correct 29 ms 9672 KB Output is correct
67 Correct 29 ms 12496 KB Output is correct
68 Correct 491 ms 5464 KB Output is correct
69 Correct 588 ms 5464 KB Output is correct
70 Correct 639 ms 5464 KB Output is correct
71 Correct 679 ms 5464 KB Output is correct
72 Correct 689 ms 5452 KB Output is correct
73 Correct 607 ms 5464 KB Output is correct
74 Correct 632 ms 5460 KB Output is correct
75 Correct 604 ms 11856 KB Output is correct
76 Correct 690 ms 11776 KB Output is correct
77 Correct 593 ms 10072 KB Output is correct
78 Correct 667 ms 10072 KB Output is correct
79 Correct 645 ms 11608 KB Output is correct
80 Correct 627 ms 11600 KB Output is correct
81 Correct 1 ms 344 KB Output is correct
82 Correct 1 ms 600 KB Output is correct
83 Correct 1 ms 600 KB Output is correct
84 Correct 15 ms 5464 KB Output is correct
85 Correct 12 ms 5360 KB Output is correct
86 Correct 13 ms 5464 KB Output is correct
87 Correct 22 ms 11608 KB Output is correct
88 Correct 30 ms 11596 KB Output is correct
89 Correct 13 ms 5464 KB Output is correct
90 Correct 19 ms 5452 KB Output is correct
91 Correct 12 ms 5464 KB Output is correct
92 Correct 24 ms 11592 KB Output is correct
93 Correct 20 ms 11096 KB Output is correct
94 Correct 1 ms 344 KB Output is correct
95 Correct 1 ms 344 KB Output is correct
96 Correct 0 ms 344 KB Output is correct
97 Correct 1 ms 600 KB Output is correct
98 Correct 1 ms 600 KB Output is correct
99 Correct 1 ms 344 KB Output is correct
100 Correct 1 ms 344 KB Output is correct
101 Correct 1 ms 344 KB Output is correct
102 Correct 1 ms 600 KB Output is correct
103 Correct 1 ms 600 KB Output is correct
104 Execution timed out 4034 ms 4952 KB Time limit exceeded
105 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4002 ms 6976 KB Time limit exceeded
2 Halted 0 ms 0 KB -