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Submission #875650

# Submission time Handle Problem Language Result Execution time Memory
875650 2023-11-20T10:11:27 Z hmm789 Cat Exercise (JOI23_ho_t4) C++14
41 / 100
 98 ms 53404 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF 1000000000000000000
#define MOD 998244353

int p[200000], spt[200000][18];
vector<int> adj[200000];

int query(int x, int y) {
    int k = (int)floor(log((double)y-x+1)/log(2.0));
    if(p[spt[x][k]] > p[spt[y-(1<<k)+1][k]]) return spt[x][k];
    else return spt[y-(1<<k)+1][k];
}

int dfs(int x, int l, int r) {
    int ans = 0;
    if(x != l) ans = max(ans, dfs(query(l, x-1), l, x-1)+x-query(l, x-1));
    if(x != r) ans = max(ans, dfs(query(x+1, r), x+1, r)+query(x+1, r)-x);
    return ans;
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int n, x, y;
    cin >> n;
    for(int i = 0; i < n; i++) cin >> p[i];
    for(int i = 0; i < n-1; i++) {
        cin >> x >> y;
        x--; y--;
        adj[x].push_back(y);
        adj[y].push_back(x);
    }
    for(int i = 0; i < n; i++) spt[i][0] = i;
    for(int j = 1; (1<<j) <= n; j++) {
        for(int i = 0; i + (1<<j) - 1 < n; i++) {
            if(p[spt[i][j-1]] > p[spt[i+(1<<(j-1))][j-1]]) {
                spt[i][j] = spt[i][j-1];
            } else spt[i][j] = spt[i+(1<<(j-1))][j-1];
        }
    }
    cout << dfs(query(0, n-1), 0, n-1);
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8792 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8840 KB Output is correct
5 Correct 1 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 1 ms 8796 KB Output is correct
8 Correct 2 ms 8792 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8792 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8840 KB Output is correct
5 Correct 1 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 1 ms 8796 KB Output is correct
8 Correct 2 ms 8792 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 2 ms 8792 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 1 ms 8796 KB Output is correct
15 Correct 1 ms 8796 KB Output is correct
16 Correct 2 ms 8796 KB Output is correct
17 Correct 2 ms 8796 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8792 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8840 KB Output is correct
5 Correct 1 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 1 ms 8796 KB Output is correct
8 Correct 2 ms 8792 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 2 ms 8792 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 1 ms 8796 KB Output is correct
15 Correct 1 ms 8796 KB Output is correct
16 Correct 2 ms 8796 KB Output is correct
17 Correct 2 ms 8796 KB Output is correct
18 Correct 4 ms 9060 KB Output is correct
19 Correct 4 ms 9052 KB Output is correct
20 Correct 3 ms 9052 KB Output is correct
21 Correct 3 ms 8792 KB Output is correct
22 Correct 3 ms 8792 KB Output is correct
23 Correct 3 ms 8796 KB Output is correct
24 Correct 3 ms 8792 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8792 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8840 KB Output is correct
5 Correct 1 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 1 ms 8796 KB Output is correct
8 Correct 2 ms 8792 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 2 ms 8792 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 1 ms 8796 KB Output is correct
15 Correct 1 ms 8796 KB Output is correct
16 Correct 2 ms 8796 KB Output is correct
17 Correct 2 ms 8796 KB Output is correct
18 Correct 4 ms 9060 KB Output is correct
19 Correct 4 ms 9052 KB Output is correct
20 Correct 3 ms 9052 KB Output is correct
21 Correct 3 ms 8792 KB Output is correct
22 Correct 3 ms 8792 KB Output is correct
23 Correct 3 ms 8796 KB Output is correct
24 Correct 3 ms 8792 KB Output is correct
25 Correct 1 ms 8796 KB Output is correct
26 Incorrect 3 ms 8796 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8792 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8840 KB Output is correct
5 Correct 1 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 1 ms 8796 KB Output is correct
8 Correct 2 ms 8792 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 2 ms 8792 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 1 ms 8796 KB Output is correct
15 Correct 1 ms 8796 KB Output is correct
16 Correct 2 ms 8796 KB Output is correct
17 Correct 2 ms 8796 KB Output is correct
18 Correct 4 ms 9060 KB Output is correct
19 Correct 4 ms 9052 KB Output is correct
20 Correct 3 ms 9052 KB Output is correct
21 Correct 3 ms 8792 KB Output is correct
22 Correct 3 ms 8792 KB Output is correct
23 Correct 3 ms 8796 KB Output is correct
24 Correct 3 ms 8792 KB Output is correct
25 Correct 98 ms 50800 KB Output is correct
26 Correct 93 ms 53372 KB Output is correct
27 Correct 97 ms 53404 KB Output is correct
28 Correct 97 ms 44924 KB Output is correct
29 Correct 93 ms 44932 KB Output is correct
30 Correct 88 ms 44888 KB Output is correct
31 Correct 96 ms 44676 KB Output is correct

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8796 KB Output is correct
2 Incorrect 1 ms 8844 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8792 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8840 KB Output is correct
5 Correct 1 ms 8796 KB Output is correct
6 Correct 2 ms 8796 KB Output is correct
7 Correct 1 ms 8796 KB Output is correct
8 Correct 2 ms 8792 KB Output is correct
9 Correct 2 ms 8796 KB Output is correct
10 Correct 2 ms 8796 KB Output is correct
11 Correct 2 ms 8792 KB Output is correct
12 Correct 2 ms 8796 KB Output is correct
13 Correct 2 ms 8796 KB Output is correct
14 Correct 1 ms 8796 KB Output is correct
15 Correct 1 ms 8796 KB Output is correct
16 Correct 2 ms 8796 KB Output is correct
17 Correct 2 ms 8796 KB Output is correct
18 Correct 4 ms 9060 KB Output is correct
19 Correct 4 ms 9052 KB Output is correct
20 Correct 3 ms 9052 KB Output is correct
21 Correct 3 ms 8792 KB Output is correct
22 Correct 3 ms 8792 KB Output is correct
23 Correct 3 ms 8796 KB Output is correct
24 Correct 3 ms 8792 KB Output is correct
25 Correct 1 ms 8796 KB Output is correct
26 Incorrect 3 ms 8796 KB Output isn't correct
27 Halted 0 ms 0 KB -