oj.uz

Submission #1022675

# Submission time Handle Problem Language Result Execution time Memory
1022675 2024-07-13T22:22:17 Z JakobZorz Radio Towers (IOI22_towers) C++17
23 / 100
 4000 ms 3032 KB 
#include"towers.h"
#include<vector>
#include<iostream>
using namespace std;

int n;
vector<int>arr;
vector<int>thres;
vector<int>prv,nxt;

void init_prev(){
    prv.resize(n);
    vector<int>s;
    for(int i=0;i<n;i++){
        while(s.size()&&arr[s.back()]>arr[i])
            s.pop_back();
        if(s.empty())
            prv[i]=-1;
        else
            prv[i]=s.back();
        s.push_back(i);
    }
}

void init_nxt(){
    nxt.resize(n);
    vector<int>s;
    for(int i=n-1;i>=0;i--){
        while(s.size()&&arr[s.back()]>arr[i])
            s.pop_back();
        if(s.empty())
            nxt[i]=-1;
        else
            nxt[i]=s.back();
        s.push_back(i);
    }
}

void init_thres(){
    thres.resize(n);
    for(int i=0;i<n;i++){
        int mn=2e9;
        
        if(prv[i]!=-1){
            int mx1=0;
            for(int j=i;j>prv[i];j--)
                mx1=max(mx1,arr[j]);
            mn=min(mn,mx1);
        }
        
        if(nxt[i]!=-1){
            int mx2=0;
            for(int j=i;j<nxt[i];j++)
                mx2=max(mx2,arr[j]);
            mn=min(mn,mx2);
        }
        
        thres[i]=mn-arr[i];
    }
}

void init(int N,vector<int>H){
    arr=H;
    n=(int)arr.size();
    init_prev();
    init_nxt();
    init_thres();
}

int max_towers(int L,int R,int D){
    int first=-1,last=-1;
    int res=0;
    for(int i=L;i<=R;i++){
        if(thres[i]>=D){
            res++;
            if(first==-1)
                first=i;
            last=i;
        }
    }
    if(first==-1){
        int sm=L;
        for(int i=L;i<=R;i++)
            if(arr[i]<arr[sm])
                sm=i;
        
        int mx=0;
        for(int i=sm;i<=R;i++){
            if(arr[i]<=mx-D)
                return 2;
            mx=max(mx,arr[i]);
        }
        
        mx=0;
        for(int i=sm;i>=L;i--){
            if(arr[i]<=mx-D)
                return 2;
            mx=max(mx,arr[i]);
        }
            
        return 1;
    }
    
    int mx=0;
    for(int i=first;i>=L;i--){
        if(max(arr[i],arr[first])+D<=mx){
            res++;
            break;
        }
        mx=max(mx,arr[i]);
    }
    
    mx=0;
    for(int i=last;i<=R;i++){
        if(max(arr[i],arr[last])+D<=mx){
            res++;
            break;
        }
        mx=max(mx,arr[i]);
    }
    
    return res;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4051 ms 2060 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 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 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 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 344 KB Output is correct
27 Correct 1 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 0 ms 344 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 344 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 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 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 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 344 KB Output is correct
27 Correct 1 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 0 ms 344 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 9 ms 1880 KB Output is correct
37 Correct 13 ms 2648 KB Output is correct
38 Correct 15 ms 2620 KB Output is correct
39 Correct 12 ms 2648 KB Output is correct
40 Correct 12 ms 2648 KB Output is correct
41 Correct 12 ms 2736 KB Output is correct
42 Correct 18 ms 2620 KB Output is correct
43 Correct 10 ms 2632 KB Output is correct
44 Correct 9 ms 2824 KB Output is correct
45 Correct 633 ms 2904 KB Output is correct
46 Correct 386 ms 2784 KB Output is correct
47 Correct 13 ms 2656 KB Output is correct
48 Correct 17 ms 2624 KB Output is correct
49 Correct 13 ms 2648 KB Output is correct
50 Correct 10 ms 3032 KB Output is correct
51 Correct 10 ms 2644 KB Output is correct
52 Correct 19 ms 2620 KB Output is correct
53 Correct 15 ms 2648 KB Output is correct
54 Correct 18 ms 2648 KB Output is correct
55 Correct 10 ms 3028 KB Output is correct
56 Correct 648 ms 2808 KB Output is correct
57 Correct 18 ms 2648 KB Output is correct
58 Correct 13 ms 2648 KB Output is correct
59 Correct 13 ms 2648 KB Output is correct
60 Correct 12 ms 2648 KB Output is correct
61 Correct 12 ms 2648 KB Output is correct
62 Correct 12 ms 2648 KB Output is correct
63 Correct 12 ms 2908 KB Output is correct
64 Correct 9 ms 2632 KB Output is correct
65 Correct 10 ms 3008 KB Output is correct
66 Correct 748 ms 2784 KB Output is correct
67 Correct 16 ms 3028 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4059 ms 2648 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1605 ms 972 KB Output is correct
2 Execution timed out 4094 ms 2648 KB Time limit exceeded
3 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 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 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 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 344 KB Output is correct
27 Correct 1 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 0 ms 344 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 9 ms 1880 KB Output is correct
37 Correct 13 ms 2648 KB Output is correct
38 Correct 15 ms 2620 KB Output is correct
39 Correct 12 ms 2648 KB Output is correct
40 Correct 12 ms 2648 KB Output is correct
41 Correct 12 ms 2736 KB Output is correct
42 Correct 18 ms 2620 KB Output is correct
43 Correct 10 ms 2632 KB Output is correct
44 Correct 9 ms 2824 KB Output is correct
45 Correct 633 ms 2904 KB Output is correct
46 Correct 386 ms 2784 KB Output is correct
47 Correct 13 ms 2656 KB Output is correct
48 Correct 17 ms 2624 KB Output is correct
49 Correct 13 ms 2648 KB Output is correct
50 Correct 10 ms 3032 KB Output is correct
51 Correct 10 ms 2644 KB Output is correct
52 Correct 19 ms 2620 KB Output is correct
53 Correct 15 ms 2648 KB Output is correct
54 Correct 18 ms 2648 KB Output is correct
55 Correct 10 ms 3028 KB Output is correct
56 Correct 648 ms 2808 KB Output is correct
57 Correct 18 ms 2648 KB Output is correct
58 Correct 13 ms 2648 KB Output is correct
59 Correct 13 ms 2648 KB Output is correct
60 Correct 12 ms 2648 KB Output is correct
61 Correct 12 ms 2648 KB Output is correct
62 Correct 12 ms 2648 KB Output is correct
63 Correct 12 ms 2908 KB Output is correct
64 Correct 9 ms 2632 KB Output is correct
65 Correct 10 ms 3008 KB Output is correct
66 Correct 748 ms 2784 KB Output is correct
67 Correct 16 ms 3028 KB Output is correct
68 Execution timed out 4059 ms 2648 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 4051 ms 2060 KB Time limit exceeded
2 Halted 0 ms 0 KB -