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Submission #1026396

# Submission time Handle Problem Language Result Execution time Memory
1026396 2024-07-18T04:28:48 Z Mardonbekhazratov Radio Towers (IOI22_towers) C++17
27 / 100
 4000 ms 4808 KB 
#include "towers.h"

#include <vector>
#include <algorithm>
#include <iostream>
#include <map>
#include <set>

using namespace std;

struct SegTree{
    int N;
    vector<int>tree;

    int merge(int a,int b){
        return max(a,b);
    }

    void build(int n){
        N=1;
        while(N<n) N<<=1;
        
        tree.assign(2*N,0);
    }

    void update(int v,int l,int r,int id,int x){
        if(r-l==1){
            tree[v]=x;
            return;
        }
        int mid=(l+r)/2;
        if(id<mid) update(v<<1,l,mid,id,x);
        else update(v<<1|1,mid,r,id,x);
        tree[v]=merge(tree[v<<1],tree[v<<1|1]);
    }

    void update(int id,int x){
        return update(1,0,N,id,x);
    }

    int get(int v,int l,int r,int ql,int qr){
        if(ql>=r || l>=qr) return 0;
        if(l>=ql && qr>=r) return tree[v];

        int mid=(l+r)/2;
        return merge(get(v<<1,l,mid,ql,qr),get(v<<1|1,mid,r,ql,qr));
    }

    int get(int l,int r){
        if(r<=l) return 0;
        return get(1,0,N,l,r);
    }
};

int n,k;
vector<int>h;
bool su1=true;


void init(int N, std::vector<int> H) {
    n=N;
    h=H;
    k=0;
    bool ok=true;
    for(int i=1;i<n;i++){
        if(h[i]>h[i-1] && ok) k=i;
        else{
            if(h[i]>h[i-1]) su1=false;
            ok=false;
        }
    }
}

int max_towers(int L, int R, int D) {
    if(su1){
        if(L<k && R>k && h[k]-D>=h[L] && h[k]-D>=h[R]) return 2;
        return 1;
    }
    vector<int>a,dp(R-L+1);
    dp[0]=1;
    for(int i=L;i<=R;i++){
        a.push_back(h[i]);
    }
    
    // map<int,int>mp;
    vector<int>b=a;
    sort(b.begin(),b.end());
    int c=b.size();
    // for(int x:b) m[x]=c++;
    SegTree S1,S2;
    S1.build(c+2);
    S2.build(c+2);
    
    int ans=1,mx=0;
    for(int i=0;i<a.size();i++){
        int pos=lower_bound(b.begin(),b.end(),a[i]+D)-b.begin();
        dp[i]=S2.get(pos,c+2);
        dp[i]++;
        ans=max(ans,dp[i]);
        int pos2=lower_bound(b.begin(),b.end(),a[i])-b.begin();
        S1.update(pos2,dp[i]);
        int pos1=lower_bound(b.begin(),b.end(),a[i]-D+1)-b.begin();
        S2.update(pos2,S1.get(0,pos1));
        // cout<<dp[i]<<' ';
    }
    return ans;
}

Compilation message

towers.cpp: In function 'int max_towers(int, int, int)':
towers.cpp:95:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     for(int i=0;i<a.size();i++){
      |                 ~^~~~~~~~~
towers.cpp:94:15: warning: unused variable 'mx' [-Wunused-variable]
   94 |     int ans=1,mx=0;
      |               ^~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 317 ms 1112 KB Output is correct
2 Correct 641 ms 1368 KB Output is correct
3 Correct 649 ms 1368 KB Output is correct
4 Correct 639 ms 1368 KB Output is correct
5 Correct 649 ms 1368 KB Output is correct
6 Correct 597 ms 1368 KB Output is correct
7 Correct 547 ms 1368 KB Output is correct
8 Correct 0 ms 596 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 1 ms 356 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 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 1 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 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 436 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 2 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 2 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 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 1 ms 344 KB Output is correct
31 Correct 2 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 1 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 1 ms 356 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 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 1 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 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 436 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 2 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 2 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 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 1 ms 344 KB Output is correct
31 Correct 2 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 20 ms 1624 KB Output is correct
37 Correct 28 ms 2776 KB Output is correct
38 Correct 16 ms 1488 KB Output is correct
39 Correct 29 ms 2000 KB Output is correct
40 Correct 18 ms 1488 KB Output is correct
41 Correct 65 ms 4304 KB Output is correct
42 Correct 16 ms 1368 KB Output is correct
43 Correct 14 ms 1600 KB Output is correct
44 Correct 8 ms 1596 KB Output is correct
45 Correct 11 ms 1368 KB Output is correct
46 Correct 8 ms 1444 KB Output is correct
47 Correct 34 ms 2768 KB Output is correct
48 Correct 23 ms 2000 KB Output is correct
49 Correct 13 ms 1368 KB Output is correct
50 Correct 9 ms 1368 KB Output is correct
51 Correct 24 ms 2740 KB Output is correct
52 Correct 95 ms 4560 KB Output is correct
53 Correct 88 ms 4560 KB Output is correct
54 Correct 88 ms 4560 KB Output is correct
55 Correct 8 ms 1368 KB Output is correct
56 Correct 49 ms 4536 KB Output is correct
57 Correct 86 ms 4308 KB Output is correct
58 Correct 84 ms 4516 KB Output is correct
59 Correct 86 ms 4560 KB Output is correct
60 Correct 103 ms 4560 KB Output is correct
61 Correct 88 ms 4556 KB Output is correct
62 Correct 80 ms 4560 KB Output is correct
63 Correct 88 ms 4572 KB Output is correct
64 Correct 8 ms 1368 KB Output is correct
65 Correct 15 ms 1600 KB Output is correct
66 Correct 46 ms 4540 KB Output is correct
67 Correct 41 ms 4560 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4050 ms 4808 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 4091 ms 1780 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 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 1 ms 356 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 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 1 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 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 436 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 2 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 2 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 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 1 ms 344 KB Output is correct
31 Correct 2 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 20 ms 1624 KB Output is correct
37 Correct 28 ms 2776 KB Output is correct
38 Correct 16 ms 1488 KB Output is correct
39 Correct 29 ms 2000 KB Output is correct
40 Correct 18 ms 1488 KB Output is correct
41 Correct 65 ms 4304 KB Output is correct
42 Correct 16 ms 1368 KB Output is correct
43 Correct 14 ms 1600 KB Output is correct
44 Correct 8 ms 1596 KB Output is correct
45 Correct 11 ms 1368 KB Output is correct
46 Correct 8 ms 1444 KB Output is correct
47 Correct 34 ms 2768 KB Output is correct
48 Correct 23 ms 2000 KB Output is correct
49 Correct 13 ms 1368 KB Output is correct
50 Correct 9 ms 1368 KB Output is correct
51 Correct 24 ms 2740 KB Output is correct
52 Correct 95 ms 4560 KB Output is correct
53 Correct 88 ms 4560 KB Output is correct
54 Correct 88 ms 4560 KB Output is correct
55 Correct 8 ms 1368 KB Output is correct
56 Correct 49 ms 4536 KB Output is correct
57 Correct 86 ms 4308 KB Output is correct
58 Correct 84 ms 4516 KB Output is correct
59 Correct 86 ms 4560 KB Output is correct
60 Correct 103 ms 4560 KB Output is correct
61 Correct 88 ms 4556 KB Output is correct
62 Correct 80 ms 4560 KB Output is correct
63 Correct 88 ms 4572 KB Output is correct
64 Correct 8 ms 1368 KB Output is correct
65 Correct 15 ms 1600 KB Output is correct
66 Correct 46 ms 4540 KB Output is correct
67 Correct 41 ms 4560 KB Output is correct
68 Execution timed out 4050 ms 4808 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 317 ms 1112 KB Output is correct
2 Correct 641 ms 1368 KB Output is correct
3 Correct 649 ms 1368 KB Output is correct
4 Correct 639 ms 1368 KB Output is correct
5 Correct 649 ms 1368 KB Output is correct
6 Correct 597 ms 1368 KB Output is correct
7 Correct 547 ms 1368 KB Output is correct
8 Correct 0 ms 596 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Correct 1 ms 356 KB Output is correct
14 Correct 1 ms 344 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 0 ms 344 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 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 436 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 2 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 2 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 1 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 1 ms 344 KB Output is correct
39 Correct 1 ms 344 KB Output is correct
40 Correct 1 ms 344 KB Output is correct
41 Correct 2 ms 344 KB Output is correct
42 Correct 0 ms 344 KB Output is correct
43 Correct 0 ms 344 KB Output is correct
44 Correct 1 ms 344 KB Output is correct
45 Correct 1 ms 344 KB Output is correct
46 Correct 20 ms 1624 KB Output is correct
47 Correct 28 ms 2776 KB Output is correct
48 Correct 16 ms 1488 KB Output is correct
49 Correct 29 ms 2000 KB Output is correct
50 Correct 18 ms 1488 KB Output is correct
51 Correct 65 ms 4304 KB Output is correct
52 Correct 16 ms 1368 KB Output is correct
53 Correct 14 ms 1600 KB Output is correct
54 Correct 8 ms 1596 KB Output is correct
55 Correct 11 ms 1368 KB Output is correct
56 Correct 8 ms 1444 KB Output is correct
57 Correct 34 ms 2768 KB Output is correct
58 Correct 23 ms 2000 KB Output is correct
59 Correct 13 ms 1368 KB Output is correct
60 Correct 9 ms 1368 KB Output is correct
61 Correct 24 ms 2740 KB Output is correct
62 Correct 95 ms 4560 KB Output is correct
63 Correct 88 ms 4560 KB Output is correct
64 Correct 88 ms 4560 KB Output is correct
65 Correct 8 ms 1368 KB Output is correct
66 Correct 49 ms 4536 KB Output is correct
67 Correct 86 ms 4308 KB Output is correct
68 Correct 84 ms 4516 KB Output is correct
69 Correct 86 ms 4560 KB Output is correct
70 Correct 103 ms 4560 KB Output is correct
71 Correct 88 ms 4556 KB Output is correct
72 Correct 80 ms 4560 KB Output is correct
73 Correct 88 ms 4572 KB Output is correct
74 Correct 8 ms 1368 KB Output is correct
75 Correct 15 ms 1600 KB Output is correct
76 Correct 46 ms 4540 KB Output is correct
77 Correct 41 ms 4560 KB Output is correct
78 Execution timed out 4050 ms 4808 KB Time limit exceeded
79 Halted 0 ms 0 KB -