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Submission #885036

# Submission time Handle Problem Language Result Execution time Memory
885036 2023-12-08T20:40:37 Z patrikpavic2 Palindromes (APIO14_palindrome) C++17
100 / 100
 93 ms 84612 KB 
#include <algorithm>
#include <vector>
#include <cstdio>
#include <cstring>
#include <iostream>
 
#define PB push_back
 
using namespace std;
 
typedef long long ll;
 
const int N = 3e5 + 500;
const int INF = 0x3f3f3f3f;
 
struct node{
    node *ch[30], *bk;
    int len, cnt;
};
 
bool cmp(node* X, node* Y){
    return X->len > Y->len;
}
 
string s;
int n;
ll mx;
vector < node* > v;
 
void precompute(){
    node *n1 = new node(); 
    node *n0 = new node();
    n1->len = -1, n0->len = 0;
    n0->bk = n1; n1->bk = n1;
    node* cur = n0;
    for(int i = 0;i < n;i++){
        for(; cur->len + 1 > i || s[i - cur->len - 1] != s[i]; cur = cur->bk);
        node *rmb = cur->bk;
        if(cur->ch[s[i] - 'a'] == NULL)
            cur->ch[s[i] - 'a'] = new node(), v.PB(cur->ch[s[i] - 'a']);
        cur->ch[s[i] - 'a']->len = cur->len + 2;
        cur = cur->ch[s[i] - 'a'];
        cur->cnt++;
        for(; rmb->len + 1 > i || s[i - rmb->len - 1] != s[i]; rmb = rmb->bk);
        if(cur->len == 1)
            cur->bk = n0;
        else{
            if(rmb->ch[s[i] - 'a'] == NULL)
                rmb->ch[s[i] - 'a'] = new node(), v.PB(rmb->ch[s[i] - 'a']);
            cur->bk = rmb->ch[s[i] - 'a'];
        }
    }
}
 
 
 
int main(){
	cin >> s;
	n = (int)s.size();
    precompute();
    sort(v.begin(), v.end(), cmp);
    for(int i = 0;i < v.size();i++){
        mx = max(mx, (ll)v[i]->len * v[i]->cnt);
        v[i]->bk->cnt += v[i]->cnt;
    }
    cout << mx << endl;
}

Compilation message

palindrome.cpp: In function 'int main()':
palindrome.cpp:62:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for(int i = 0;i < v.size();i++){
      |                   ~~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 600 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 1 ms 612 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 604 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3164 KB Output is correct
2 Correct 2 ms 3164 KB Output is correct
3 Correct 2 ms 2980 KB Output is correct
4 Correct 2 ms 3164 KB Output is correct
5 Correct 2 ms 3164 KB Output is correct
6 Correct 2 ms 3164 KB Output is correct
7 Correct 2 ms 3124 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 2 ms 2140 KB Output is correct

Subtask #4
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 27732 KB Output is correct
2 Correct 25 ms 27732 KB Output is correct
3 Correct 18 ms 27848 KB Output is correct
4 Correct 27 ms 27732 KB Output is correct
5 Correct 31 ms 27980 KB Output is correct
6 Correct 18 ms 20304 KB Output is correct
7 Correct 19 ms 23832 KB Output is correct
8 Correct 3 ms 604 KB Output is correct
9 Correct 6 ms 6788 KB Output is correct
10 Correct 22 ms 23524 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 84612 KB Output is correct
2 Correct 78 ms 84184 KB Output is correct
3 Correct 64 ms 83844 KB Output is correct
4 Correct 82 ms 83420 KB Output is correct
5 Correct 93 ms 83932 KB Output is correct
6 Correct 75 ms 74936 KB Output is correct
7 Correct 74 ms 69048 KB Output is correct
8 Correct 6 ms 1012 KB Output is correct
9 Correct 6 ms 1016 KB Output is correct
10 Correct 70 ms 67964 KB Output is correct
11 Correct 67 ms 83680 KB Output is correct
12 Correct 12 ms 8440 KB Output is correct