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Submission #388944

# Submission time Handle Problem Language Result Execution time Memory
388944 2021-04-13T10:57:28 Z phathnv Palindromes (APIO14_palindrome) C++11
100 / 100
 95 ms 87728 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

const int N = 3e5 + 7;

struct node{
    int len, cnt;
    node *nxt[26], *suf;
    node(int _len = 0){
        len = _len;
        cnt = 0;
        for(int i = 0; i < 26; i++)
            nxt[i] = nullptr;
        suf = nullptr;
    }
};

string s;
node *root1, *root2, *cur;
vector <node*> a[N];

void insert(int pos){
    int id = s[pos] - 'a';
    if (pos - cur->len - 1 < 0)
        cur = cur->suf;
    while(s[pos] != s[pos - cur->len - 1])
        cur = cur->suf;
    if (cur->nxt[id] != nullptr){
        cur = cur->nxt[id];
        return;
    }
    cur->nxt[id] = new node(cur->len + 2);
    if (cur == root1){
        cur->nxt[id]->suf = root2;
    } else {
        node *tmp = cur->suf;
        while(s[pos] != s[pos - tmp->len - 1])
            tmp = tmp->suf;
        cur->nxt[id]->suf = tmp->nxt[id];
    }
    cur = cur->nxt[id];
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin >> s;

    root1 = new node(-1);
    root2 = new node(0);
    root2->suf = root1;
    cur = root2;
    for(int i = 0; i < (int) s.size(); i++){
        insert(i);
        a[cur->len].push_back(cur);
        cur->cnt++;
    }
    ll res = 0;
    for(int i = s.size(); i >= 1; i--)
        for(node *cur : a[i]){
            res = max(res, (ll) cur->len * cur->cnt);
            cur->suf->cnt += cur->cnt;
            cur->cnt = 0;
        }
    cout << res;
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 7244 KB Output is correct
2 Correct 5 ms 7244 KB Output is correct
3 Correct 5 ms 7368 KB Output is correct
4 Correct 5 ms 7244 KB Output is correct
5 Correct 5 ms 7368 KB Output is correct
6 Correct 5 ms 7244 KB Output is correct
7 Correct 5 ms 7244 KB Output is correct
8 Correct 4 ms 7244 KB Output is correct
9 Correct 4 ms 7372 KB Output is correct
10 Correct 4 ms 7244 KB Output is correct
11 Correct 4 ms 7364 KB Output is correct
12 Correct 4 ms 7372 KB Output is correct
13 Correct 4 ms 7360 KB Output is correct
14 Correct 4 ms 7372 KB Output is correct
15 Correct 4 ms 7312 KB Output is correct
16 Correct 4 ms 7264 KB Output is correct
17 Correct 4 ms 7328 KB Output is correct
18 Correct 4 ms 7244 KB Output is correct
19 Correct 4 ms 7372 KB Output is correct
20 Correct 6 ms 7368 KB Output is correct
21 Correct 5 ms 7372 KB Output is correct
22 Correct 4 ms 7364 KB Output is correct
23 Correct 4 ms 7372 KB Output is correct
24 Correct 5 ms 7372 KB Output is correct
25 Correct 5 ms 7364 KB Output is correct
26 Correct 5 ms 7276 KB Output is correct
27 Correct 5 ms 7372 KB Output is correct
28 Correct 4 ms 7372 KB Output is correct
29 Correct 4 ms 7372 KB Output is correct
30 Correct 6 ms 7372 KB Output is correct
31 Correct 5 ms 7376 KB Output is correct
32 Correct 5 ms 7372 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 7500 KB Output is correct
2 Correct 5 ms 7500 KB Output is correct
3 Correct 4 ms 7628 KB Output is correct
4 Correct 5 ms 7576 KB Output is correct
5 Correct 6 ms 7616 KB Output is correct
6 Correct 5 ms 7616 KB Output is correct
7 Correct 6 ms 7556 KB Output is correct
8 Correct 5 ms 7500 KB Output is correct
9 Correct 5 ms 7500 KB Output is correct
10 Correct 5 ms 7372 KB Output is correct
11 Correct 5 ms 7360 KB Output is correct
12 Correct 5 ms 7576 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9804 KB Output is correct
2 Correct 7 ms 9804 KB Output is correct
3 Correct 7 ms 9932 KB Output is correct
4 Correct 7 ms 9992 KB Output is correct
5 Correct 7 ms 9928 KB Output is correct
6 Correct 7 ms 9804 KB Output is correct
7 Correct 7 ms 9860 KB Output is correct
8 Correct 6 ms 7628 KB Output is correct
9 Correct 7 ms 7628 KB Output is correct
10 Correct 6 ms 9164 KB Output is correct

Subtask #4
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 32588 KB Output is correct
2 Correct 34 ms 32856 KB Output is correct
3 Correct 31 ms 34124 KB Output is correct
4 Correct 30 ms 33044 KB Output is correct
5 Correct 32 ms 32776 KB Output is correct
6 Correct 27 ms 26312 KB Output is correct
7 Correct 35 ms 29124 KB Output is correct
8 Correct 10 ms 8860 KB Output is correct
9 Correct 14 ms 14372 KB Output is correct
10 Correct 28 ms 29456 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 82980 KB Output is correct
2 Correct 92 ms 83556 KB Output is correct
3 Correct 93 ms 87728 KB Output is correct
4 Correct 76 ms 85000 KB Output is correct
5 Correct 87 ms 83904 KB Output is correct
6 Correct 83 ms 75040 KB Output is correct
7 Correct 91 ms 70984 KB Output is correct
8 Correct 16 ms 12616 KB Output is correct
9 Correct 16 ms 12616 KB Output is correct
10 Correct 95 ms 71176 KB Output is correct
11 Correct 95 ms 83020 KB Output is correct
12 Correct 22 ms 17692 KB Output is correct