oj.uz

Submission #444031

# Submission time Handle Problem Language Result Execution time Memory
444031 2021-07-13T03:17:18 Z Killer2501 Palindromes (APIO14_palindrome) C++14
100 / 100
 80 ms 71244 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
using namespace std;
using ll = int;
using pll = pair<ll, ll>;
const int N = 3e5+5;
const int mod = 1e9+7;
int n, m, k, now, suff;
long long ans;
string s;
struct node
{
    ll num, len, slink, nxt[26];
    vector<ll> e;
}tree[N];
void init()
{
    now = suff = 2;
    tree[1].len = -1;
    tree[1].slink = 1;
    tree[1].e.pb(2);
    tree[2].len = 0;
    tree[2].slink = 1;

}
void add(int pos)
{
    int c = s[pos] - 'a';
    int cur = suff, curlen = 0;
    while(true)
    {
        curlen = tree[cur].len;
        if(pos-curlen-1 >= 0 && s[pos-curlen-1] == s[pos])break;
        cur = tree[cur].slink;
    }
    if(tree[cur].nxt[c])
    {
        suff = tree[cur].nxt[c];
        ++tree[suff].num;
        return;
    }
    ++now;
    suff = now;
    tree[now].len = tree[cur].len + 2;
    tree[now].num = 1;
    tree[cur].nxt[c] = now;
    if(tree[now].len == 1)
    {
        tree[2].e.pb(now);
        tree[now].slink = 2;
        return;
    }
    while(true)
    {
        cur = tree[cur].slink;
        curlen = tree[cur].len;
        if(pos-curlen-1 >= 0 && s[pos-curlen-1] == s[pos])break;
    }
    tree[now].slink = tree[cur].nxt[c];
    tree[tree[now].slink].e.pb(now);
}
void dfs(ll u)
{
    for(ll v : tree[u].e)
    {
        dfs(v);
        tree[u].num += tree[v].num;
    }
    ans = max(ans, 1ll*tree[u].num * tree[u].len);
}
void sol()
{
    cin >> s;
    init();
    for(int i = 0; i < s.length(); i ++)add(i);
    dfs(1);
    cout << ans;
}
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    sol();
}

Compilation message

palindrome.cpp: In function 'void sol()':
palindrome.cpp:77:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |     for(int i = 0; i < s.length(); i ++)add(i);
      |                    ~~^~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 42484 KB Output is correct
2 Correct 21 ms 42492 KB Output is correct
3 Correct 21 ms 42500 KB Output is correct
4 Correct 20 ms 42484 KB Output is correct
5 Correct 21 ms 42516 KB Output is correct
6 Correct 21 ms 42540 KB Output is correct
7 Correct 20 ms 42572 KB Output is correct
8 Correct 22 ms 42552 KB Output is correct
9 Correct 20 ms 42572 KB Output is correct
10 Correct 20 ms 42572 KB Output is correct
11 Correct 21 ms 42540 KB Output is correct
12 Correct 20 ms 42580 KB Output is correct
13 Correct 20 ms 42572 KB Output is correct
14 Correct 20 ms 42572 KB Output is correct
15 Correct 21 ms 42572 KB Output is correct
16 Correct 20 ms 42500 KB Output is correct
17 Correct 20 ms 42556 KB Output is correct
18 Correct 21 ms 42572 KB Output is correct
19 Correct 21 ms 42464 KB Output is correct
20 Correct 20 ms 42580 KB Output is correct
21 Correct 20 ms 42544 KB Output is correct
22 Correct 20 ms 42572 KB Output is correct
23 Correct 22 ms 42544 KB Output is correct
24 Correct 20 ms 42572 KB Output is correct
25 Correct 21 ms 42504 KB Output is correct
26 Correct 20 ms 42512 KB Output is correct
27 Correct 21 ms 42512 KB Output is correct
28 Correct 21 ms 42572 KB Output is correct
29 Correct 22 ms 42656 KB Output is correct
30 Correct 19 ms 42572 KB Output is correct
31 Correct 21 ms 42528 KB Output is correct
32 Correct 21 ms 42480 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 42584 KB Output is correct
2 Correct 20 ms 42572 KB Output is correct
3 Correct 21 ms 42572 KB Output is correct
4 Correct 21 ms 42572 KB Output is correct
5 Correct 21 ms 42636 KB Output is correct
6 Correct 21 ms 42664 KB Output is correct
7 Correct 21 ms 42580 KB Output is correct
8 Correct 21 ms 42584 KB Output is correct
9 Correct 21 ms 42572 KB Output is correct
10 Correct 21 ms 42564 KB Output is correct
11 Correct 21 ms 42508 KB Output is correct
12 Correct 21 ms 42572 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 43120 KB Output is correct
2 Correct 23 ms 43084 KB Output is correct
3 Correct 24 ms 43472 KB Output is correct
4 Correct 23 ms 43360 KB Output is correct
5 Correct 20 ms 42680 KB Output is correct
6 Correct 21 ms 42844 KB Output is correct
7 Correct 22 ms 42964 KB Output is correct
8 Correct 21 ms 42488 KB Output is correct
9 Correct 21 ms 42572 KB Output is correct
10 Correct 21 ms 42668 KB Output is correct

Subtask #4
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 48972 KB Output is correct
2 Correct 33 ms 47568 KB Output is correct
3 Correct 38 ms 52036 KB Output is correct
4 Correct 35 ms 49852 KB Output is correct
5 Correct 42 ms 43912 KB Output is correct
6 Correct 30 ms 44784 KB Output is correct
7 Correct 31 ms 46088 KB Output is correct
8 Correct 22 ms 42828 KB Output is correct
9 Correct 24 ms 44764 KB Output is correct
10 Correct 34 ms 43728 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 59 ms 61868 KB Output is correct
2 Correct 56 ms 55104 KB Output is correct
3 Correct 67 ms 71244 KB Output is correct
4 Correct 54 ms 59368 KB Output is correct
5 Correct 80 ms 47584 KB Output is correct
6 Correct 55 ms 54368 KB Output is correct
7 Correct 53 ms 52116 KB Output is correct
8 Correct 26 ms 43436 KB Output is correct
9 Correct 26 ms 43504 KB Output is correct
10 Correct 68 ms 46676 KB Output is correct
11 Correct 58 ms 55628 KB Output is correct
12 Correct 29 ms 45680 KB Output is correct