oj.uz

Submission #1022677

# Submission time Handle Problem Language Result Execution time Memory
1022677 2024-07-13T22:29:23 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);
            //for(int j=i;j>prv[i];j--)
                //mx1=max(mx1,arr[j]);
            mn=min(mn,mx1);
        }
        
        if(nxt[i]!=-1){
            int mx2=get_max(i,nxt[i]);
            //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_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){
        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 4045 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 0 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 1 ms 600 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 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 0 ms 600 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 600 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 0 ms 600 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 0 ms 600 KB Output is correct
18 Correct 0 ms 600 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 0 ms 600 KB Output is correct
23 Correct 0 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 636 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 600 KB Output is correct
29 Correct 0 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 0 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 0 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 1 ms 600 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 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 0 ms 600 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 600 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 0 ms 600 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 0 ms 600 KB Output is correct
18 Correct 0 ms 600 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 0 ms 600 KB Output is correct
23 Correct 0 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 636 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 600 KB Output is correct
29 Correct 0 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 0 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 17 ms 10584 KB Output is correct
38 Correct 23 ms 10556 KB Output is correct
39 Correct 15 ms 10584 KB Output is correct
40 Correct 15 ms 10584 KB Output is correct
41 Correct 16 ms 10564 KB Output is correct
42 Correct 16 ms 10584 KB Output is correct
43 Correct 15 ms 10568 KB Output is correct
44 Correct 14 ms 10568 KB Output is correct
45 Correct 14 ms 10536 KB Output is correct
46 Correct 14 ms 10720 KB Output is correct
47 Correct 18 ms 10584 KB Output is correct
48 Correct 17 ms 10584 KB Output is correct
49 Correct 17 ms 10564 KB Output is correct
50 Correct 20 ms 10568 KB Output is correct
51 Correct 16 ms 10576 KB Output is correct
52 Correct 16 ms 10584 KB Output is correct
53 Correct 20 ms 10560 KB Output is correct
54 Correct 16 ms 10588 KB Output is correct
55 Correct 14 ms 10396 KB Output is correct
56 Correct 21 ms 10768 KB Output is correct
57 Correct 16 ms 10332 KB Output is correct
58 Correct 17 ms 10584 KB Output is correct
59 Correct 17 ms 10584 KB Output is correct
60 Correct 17 ms 10524 KB Output is correct
61 Correct 22 ms 10584 KB Output is correct
62 Correct 22 ms 10580 KB Output is correct
63 Correct 15 ms 10584 KB Output is correct
64 Correct 20 ms 10568 KB Output is correct
65 Correct 20 ms 10568 KB Output is correct
66 Correct 15 ms 10720 KB Output is correct
67 Correct 15 ms 10592 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4041 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 1703 ms 2836 KB Output is correct
2 Execution timed out 4091 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 0 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 1 ms 600 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 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 0 ms 600 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 600 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 0 ms 600 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 0 ms 600 KB Output is correct
18 Correct 0 ms 600 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 0 ms 600 KB Output is correct
23 Correct 0 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 636 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 600 KB Output is correct
29 Correct 0 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 0 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 17 ms 10584 KB Output is correct
38 Correct 23 ms 10556 KB Output is correct
39 Correct 15 ms 10584 KB Output is correct
40 Correct 15 ms 10584 KB Output is correct
41 Correct 16 ms 10564 KB Output is correct
42 Correct 16 ms 10584 KB Output is correct
43 Correct 15 ms 10568 KB Output is correct
44 Correct 14 ms 10568 KB Output is correct
45 Correct 14 ms 10536 KB Output is correct
46 Correct 14 ms 10720 KB Output is correct
47 Correct 18 ms 10584 KB Output is correct
48 Correct 17 ms 10584 KB Output is correct
49 Correct 17 ms 10564 KB Output is correct
50 Correct 20 ms 10568 KB Output is correct
51 Correct 16 ms 10576 KB Output is correct
52 Correct 16 ms 10584 KB Output is correct
53 Correct 20 ms 10560 KB Output is correct
54 Correct 16 ms 10588 KB Output is correct
55 Correct 14 ms 10396 KB Output is correct
56 Correct 21 ms 10768 KB Output is correct
57 Correct 16 ms 10332 KB Output is correct
58 Correct 17 ms 10584 KB Output is correct
59 Correct 17 ms 10584 KB Output is correct
60 Correct 17 ms 10524 KB Output is correct
61 Correct 22 ms 10584 KB Output is correct
62 Correct 22 ms 10580 KB Output is correct
63 Correct 15 ms 10584 KB Output is correct
64 Correct 20 ms 10568 KB Output is correct
65 Correct 20 ms 10568 KB Output is correct
66 Correct 15 ms 10720 KB Output is correct
67 Correct 15 ms 10592 KB Output is correct
68 Execution timed out 4041 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 4045 ms 6420 KB Time limit exceeded
2 Halted 0 ms 0 KB -