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Submission #597879

# Submission time Handle Problem Language Result Execution time Memory
597879 2022-07-17T03:30:06 Z Hanksburger Palindromes (APIO14_palindrome) C++17
100 / 100
 30 ms 35084 KB 
#include <bits/stdc++.h>
using namespace std;
int nxt[300005][26], len[300005], suff[300005], freq[300005], cur=1, cnt=2;
string s;
void add(int x)
{
    while (s[x-len[cur]-1]!=s[x])
        cur=suff[cur];
    int y=s[x]-'a';
    if (nxt[cur][y])
    {
        cur=nxt[cur][y];
        freq[cur]++;
        return;
    }
    nxt[cur][y]=++cnt;
    len[cnt]=len[cur]+2;
    freq[cnt]++;
    if (len[cnt]==1)
    {
        suff[cnt]=2;
        cur=cnt;
        return;
    }
    do cur=suff[cur];
    while (s[x-len[cur]-1]!=s[x]);
    suff[cnt]=nxt[cur][y];
    cur=cnt;
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    len[1]=-1;
    suff[1]=suff[2]=1;
    cin >> s;
    for (int i=0; i<s.length(); i++)
        add(i);
    long long ans=0;
    for (int i=cnt; i>=3; i--)
    {
        ans=max(ans, 1LL*freq[i]*len[i]);
        freq[suff[i]]+=freq[i];
    }
    cout << ans;
    return 0;
}

Compilation message

palindrome.cpp: In function 'int main()':
palindrome.cpp:38:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for (int i=0; i<s.length(); i++)
      |                   ~^~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 276 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 340 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 1 ms 1492 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 1 ms 1492 KB Output is correct
6 Correct 1 ms 1492 KB Output is correct
7 Correct 2 ms 1492 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 2 ms 1036 KB Output is correct

Subtask #4
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 11860 KB Output is correct
2 Correct 10 ms 11892 KB Output is correct
3 Correct 8 ms 11860 KB Output is correct
4 Correct 9 ms 11860 KB Output is correct
5 Correct 9 ms 11860 KB Output is correct
6 Correct 6 ms 8744 KB Output is correct
7 Correct 7 ms 10068 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 3 ms 3156 KB Output is correct
10 Correct 6 ms 10068 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 34808 KB Output is correct
2 Correct 29 ms 35084 KB Output is correct
3 Correct 30 ms 35060 KB Output is correct
4 Correct 25 ms 35004 KB Output is correct
5 Correct 23 ms 35028 KB Output is correct
6 Correct 20 ms 31288 KB Output is correct
7 Correct 23 ms 29284 KB Output is correct
8 Correct 5 ms 1248 KB Output is correct
9 Correct 5 ms 1244 KB Output is correct
10 Correct 20 ms 28876 KB Output is correct
11 Correct 23 ms 34988 KB Output is correct
12 Correct 7 ms 4316 KB Output is correct