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Submission #716235

# Submission time Handle Problem Language Result Execution time Memory
716235 2023-03-29T10:48:39 Z Jarif_Rahman Radio Towers (IOI22_towers) C++17
17 / 100
 1097 ms 5164 KB 
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

struct segtree{
    int k = 1;
    vector<int> v;
    segtree(int n){
        while(k < n) k*=2;
        v.assign(2*k, 0);
    }
    void update(int i, int x){
        i+=k;
        v[i] = x;
        i/=2;
        while(i){
            v[i] = max(v[2*i], v[2*i+1]);
            i/=2;
        }
    }
    int get(int l, int r, int nd, int a, int b){
        if(a > r || b < l) return 0;
        if(a >= l && b <= r) return v[nd];
        int md = (a+b)/2;
        return max(get(l, r, 2*nd, a, md), get(l, r, 2*nd+1, md+1, b));
    }
    int get(int l, int r){
        if(l > r) return 0;
        return get(l, r, 1, 0, k-1);
    }
};

int n;
vector<int> h;
segtree seg(0);
vector<int> o;
vector<int> diffs;

void init(int _n, vector<int> _h){
    swap(n, _n);
    swap(h, _h);
    seg = segtree(n);
    for(int i = 0; i < n; i++) seg.update(i, h[i]);
    for(int i = 0; i < n; i++) o.pb(i);
    sort(o.begin(), o.end(), [&](int a, int b){
        return h[a] < h[b];
    });

    set<int> s;
    for(int i: o){
        auto it = s.upper_bound(i);
        int x = 2e9;
        bool ok = 1;
        if(it != s.end()){
            int y = seg.get(i+1, *it-1);
            if(y < h[i]) ok = 0;
            x = min(x, y-h[i]);
        }
        if(it != s.begin()){
            int y = seg.get(*prev(it)+1, i-1);
            if(y < h[i]) ok = 0;
            x = min(x, y-h[i]);
        }
        if(ok) s.insert(i), diffs.pb(x);
    }

    sort(diffs.begin(), diffs.end());
}

int max_towers(int L, int R, int D){
    return int(diffs.size())-(lower_bound(diffs.begin(), diffs.end(), D)-diffs.begin());
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 347 ms 1640 KB 1st lines differ - on the 1st token, expected: '1', found: '2'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB 1st lines differ - on the 1st token, expected: '13', found: '131'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB 1st lines differ - on the 1st token, expected: '13', found: '131'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 755 ms 4288 KB 1st lines differ - on the 1st token, expected: '11903', found: '33010'
2 Halted 0 ms 0 KB -

Subtask #5
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 340 ms 1260 KB Output is correct
2 Correct 903 ms 4304 KB Output is correct
3 Correct 928 ms 4404 KB Output is correct
4 Correct 1097 ms 5044 KB Output is correct
5 Correct 1000 ms 5040 KB Output is correct
6 Correct 992 ms 5048 KB Output is correct
7 Correct 922 ms 5040 KB Output is correct
8 Correct 947 ms 2708 KB Output is correct
9 Correct 968 ms 2716 KB Output is correct
10 Correct 941 ms 2844 KB Output is correct
11 Correct 825 ms 2764 KB Output is correct
12 Correct 89 ms 4240 KB Output is correct
13 Correct 73 ms 4924 KB Output is correct
14 Correct 95 ms 5004 KB Output is correct
15 Correct 45 ms 2708 KB Output is correct
16 Correct 39 ms 2724 KB Output is correct
17 Correct 73 ms 4032 KB Output is correct
18 Correct 85 ms 4288 KB Output is correct
19 Correct 74 ms 4288 KB Output is correct
20 Correct 72 ms 4928 KB Output is correct
21 Correct 75 ms 5044 KB Output is correct
22 Correct 102 ms 5164 KB Output is correct
23 Correct 74 ms 4944 KB Output is correct
24 Correct 32 ms 2712 KB Output is correct
25 Correct 40 ms 2732 KB Output is correct
26 Correct 46 ms 2708 KB Output is correct
27 Correct 35 ms 2724 KB Output is correct
28 Correct 2 ms 384 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 208 KB Output is correct
34 Correct 2 ms 336 KB Output is correct
35 Correct 2 ms 336 KB Output is correct
36 Correct 2 ms 336 KB Output is correct
37 Correct 2 ms 336 KB Output is correct
38 Correct 2 ms 336 KB Output is correct
39 Correct 1 ms 336 KB Output is correct
40 Correct 1 ms 336 KB Output is correct
41 Correct 1 ms 336 KB Output is correct
42 Correct 1 ms 336 KB Output is correct
43 Correct 1 ms 336 KB Output is correct

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB 1st lines differ - on the 1st token, expected: '13', found: '131'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 347 ms 1640 KB 1st lines differ - on the 1st token, expected: '1', found: '2'
2 Halted 0 ms 0 KB -