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Submission #734596

# Submission time Handle Problem Language Result Execution time Memory
734596 2023-05-02T16:57:43 Z Alihan_8 Palindromes (APIO14_palindrome) C++17
23 / 100
 1000 ms 23424 KB 
#include <bits/stdc++.h>

using namespace std;

#define all(x) x.begin(), x.end()
#define pb push_back
#define ln '\n'
#define int long long

template <class _T>
bool chmin(_T &x, const _T &y){
    bool flag = false;
    if ( x > y ){
        x = y; flag |= true;
    }
    return flag;
}

template <class _T>
bool chmax(_T &x, const _T &y){
    bool flag = false;
    if ( x < y ){
        x = y; flag |= true;
    }
    return flag;
}

struct Hash{
    const int Mod = 1e9 + 7, P = 29;
    int n;
    vector <int> p, pw;
    Hash(string s) : n((int)s.size()), p(n + 1), pw(n + 1, 1) {
        for ( int i = 0; i < n; i++ ){
            pw[i + 1] = pw[i] * P % Mod;
            p[i + 1] = (p[i] * P + (s[i] - 'a' + 1)) % Mod;
        }
    }
    int get(int l, int r){
        int v = p[r + 1] - (p[l] * pw[r - l + 1]) % Mod;
        return v < 0 ? Mod + v : v;
    }
};

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    string s; cin >> s;
    int n = (int)s.size();
    Hash u(s);
    unordered_map <int,int> cnt[n + 1];
    for ( int i = 0; i < n; i++ ){
        int l = i, r = i;
        while ( l >= 0 and r < n and s[l] == s[r] ){
            cnt[r - l + 1][u.get(l, r)]++;
            l--, r++;
        }
        l = i, r = i + 1;
        while ( r < n and l >= 0 and s[l] == s[r] ){
            cnt[r - l + 1][u.get(l, r)]++;
            l--, r++;
        }
    }
    int Mx = 0;
    for ( int len = 1; len <= n; len++ ){
        for ( auto [l, r]: cnt[len] ){
            chmax(Mx, len * r);
        }
    }
    cout << Mx;

    cout << '\n';
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 316 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 320 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 324 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 320 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 468 KB Output is correct
2 Correct 5 ms 340 KB Output is correct
3 Correct 17 ms 468 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 16 ms 528 KB Output is correct
6 Correct 18 ms 468 KB Output is correct
7 Correct 2 ms 444 KB Output is correct
8 Correct 9 ms 440 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 468 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 719 ms 1828 KB Output is correct
2 Correct 410 ms 1704 KB Output is correct
3 Execution timed out 1080 ms 2420 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 26.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1072 ms 9056 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1073 ms 23424 KB Time limit exceeded
2 Halted 0 ms 0 KB -