oj.uz

Submission #1022945

# Submission time Handle Problem Language Result Execution time Memory
1022945 2024-07-14T07:56:01 Z JakobZorz Radio Towers (IOI22_towers) C++17
23 / 100
 4000 ms 10768 KB 
#include"towers.h"
#include<vector>
#include<iostream>
using namespace std;

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

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_rmq(){
    rmq=vector<vector<int>>(20,vector<int>(n));
    rmq[0]=arr;
    for(int p=1;p<20;p++){
        for(int i=0;i+(1<<p)<=n;i++){
            rmq[p][i]=max(rmq[p-1][i],rmq[p-1][i+(1<<(p-1))]);
        }
    }
}

int get_max(int l,int r){
    int pw2=2;
    int p=0;
    while(pw2<r-l){
        pw2*=2;
        p++;
    }
    pw2/=2;
    return max(rmq[p][l],rmq[p][r-pw2]);
}

void init_thres(){
    thres.resize(n);
    for(int i=0;i<n;i++){
        int mn=2e9;
        
        if(prv[i]!=-1){
            int mx1=get_max(prv[i],i);
            mn=min(mn,mx1);
        }
        
        if(nxt[i]!=-1){
            int mx2=get_max(i,nxt[i]);
            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_rmq();
    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){
        first=L;
        for(int i=L;i<=R;i++)
            if(arr[i]<arr[first])
                first=i;
        res=1;
        last=first;
    }
    
    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 4053 ms 6420 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 600 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 1 ms 600 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 0 ms 600 KB Output is correct
8 Correct 0 ms 600 KB Output is correct
9 Correct 0 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 0 ms 344 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 600 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 1 ms 600 KB Output is correct
18 Correct 1 ms 852 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 0 ms 600 KB Output is correct
21 Correct 1 ms 600 KB Output is correct
22 Correct 1 ms 600 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 0 ms 600 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 600 KB Output is correct
29 Correct 1 ms 600 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 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 1 ms 600 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 1 ms 600 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 0 ms 600 KB Output is correct
8 Correct 0 ms 600 KB Output is correct
9 Correct 0 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 0 ms 344 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 600 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 1 ms 600 KB Output is correct
18 Correct 1 ms 852 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 0 ms 600 KB Output is correct
21 Correct 1 ms 600 KB Output is correct
22 Correct 1 ms 600 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 0 ms 600 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 600 KB Output is correct
29 Correct 1 ms 600 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 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 11 ms 7000 KB Output is correct
37 Correct 18 ms 10560 KB Output is correct
38 Correct 19 ms 10636 KB Output is correct
39 Correct 16 ms 10548 KB Output is correct
40 Correct 16 ms 10560 KB Output is correct
41 Correct 16 ms 10584 KB Output is correct
42 Correct 16 ms 10528 KB Output is correct
43 Correct 15 ms 10568 KB Output is correct
44 Correct 19 ms 10568 KB Output is correct
45 Correct 16 ms 10720 KB Output is correct
46 Correct 15 ms 10724 KB Output is correct
47 Correct 18 ms 10528 KB Output is correct
48 Correct 17 ms 10584 KB Output is correct
49 Correct 17 ms 10580 KB Output is correct
50 Correct 15 ms 10548 KB Output is correct
51 Correct 15 ms 10580 KB Output is correct
52 Correct 18 ms 10584 KB Output is correct
53 Correct 21 ms 10584 KB Output is correct
54 Correct 23 ms 10552 KB Output is correct
55 Correct 19 ms 10568 KB Output is correct
56 Correct 15 ms 10768 KB Output is correct
57 Correct 22 ms 10328 KB Output is correct
58 Correct 24 ms 10576 KB Output is correct
59 Correct 18 ms 10584 KB Output is correct
60 Correct 16 ms 10576 KB Output is correct
61 Correct 17 ms 10584 KB Output is correct
62 Correct 17 ms 10584 KB Output is correct
63 Correct 16 ms 10528 KB Output is correct
64 Correct 14 ms 10568 KB Output is correct
65 Correct 15 ms 10568 KB Output is correct
66 Correct 15 ms 10720 KB Output is correct
67 Correct 23 ms 10568 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4061 ms 10452 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1692 ms 2836 KB Output is correct
2 Execution timed out 4026 ms 10584 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 600 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 1 ms 600 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 0 ms 600 KB Output is correct
8 Correct 0 ms 600 KB Output is correct
9 Correct 0 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 0 ms 344 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 600 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 1 ms 600 KB Output is correct
18 Correct 1 ms 852 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 0 ms 600 KB Output is correct
21 Correct 1 ms 600 KB Output is correct
22 Correct 1 ms 600 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 0 ms 600 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 600 KB Output is correct
29 Correct 1 ms 600 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 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 11 ms 7000 KB Output is correct
37 Correct 18 ms 10560 KB Output is correct
38 Correct 19 ms 10636 KB Output is correct
39 Correct 16 ms 10548 KB Output is correct
40 Correct 16 ms 10560 KB Output is correct
41 Correct 16 ms 10584 KB Output is correct
42 Correct 16 ms 10528 KB Output is correct
43 Correct 15 ms 10568 KB Output is correct
44 Correct 19 ms 10568 KB Output is correct
45 Correct 16 ms 10720 KB Output is correct
46 Correct 15 ms 10724 KB Output is correct
47 Correct 18 ms 10528 KB Output is correct
48 Correct 17 ms 10584 KB Output is correct
49 Correct 17 ms 10580 KB Output is correct
50 Correct 15 ms 10548 KB Output is correct
51 Correct 15 ms 10580 KB Output is correct
52 Correct 18 ms 10584 KB Output is correct
53 Correct 21 ms 10584 KB Output is correct
54 Correct 23 ms 10552 KB Output is correct
55 Correct 19 ms 10568 KB Output is correct
56 Correct 15 ms 10768 KB Output is correct
57 Correct 22 ms 10328 KB Output is correct
58 Correct 24 ms 10576 KB Output is correct
59 Correct 18 ms 10584 KB Output is correct
60 Correct 16 ms 10576 KB Output is correct
61 Correct 17 ms 10584 KB Output is correct
62 Correct 17 ms 10584 KB Output is correct
63 Correct 16 ms 10528 KB Output is correct
64 Correct 14 ms 10568 KB Output is correct
65 Correct 15 ms 10568 KB Output is correct
66 Correct 15 ms 10720 KB Output is correct
67 Correct 23 ms 10568 KB Output is correct
68 Execution timed out 4061 ms 10452 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 4053 ms 6420 KB Time limit exceeded
2 Halted 0 ms 0 KB -