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Submission #307750

# Submission time Handle Problem Language Result Execution time Memory
307750 2020-09-29T09:21:30 Z richyrich Palindromes (APIO14_palindrome) C++17
100 / 100
 45 ms 35476 KB 
//#include "shoes.h"
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 3e5+10;
int tree[N][26], idx, len[N], link[N], t, n, occ[N];
string k;
char s[N];
void init() {
    len[1] = -1, len[2] = 0;
    link[1] = 1, link[2] = 1;
    idx = t = 2;
}
void extend(int p) {
    while(s[p - len[t] - 1] != s[p]) t = link[t];         //WoW
    int x = link[t], c = s[p]-'a';
    if(!tree[t][c])  {
        while(s[p - len[x] - 1] != s[p]) x = link[x];
        tree[t][c] = ++idx;
        len[idx] = len[t] + 2;
        link[idx] = len[idx] == 1 ? 2 : tree[x][c]; 
    }
    t = tree[t][c];
    //printf("%d %d\n", p, t);
    occ[t]++;
}
int main() {
    cin >> k;
    init();
    n = k.size();
    for(int i = 0; i < n; i++) s[i+1] = k[i];
    for(int i = 1; i <= n; i++) extend(i);
    for(int i = idx; i > 2; i--) {
        occ[link[i]] += occ[i];   
    }
    ll ans = 0;
    for(int i = 2; i <= idx; i++) {
        ans = max(ans, (ll)len[i] * occ[i]);
    }
    printf("%lld\n", ans); 
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 0 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 0 ms 384 KB Output is correct
21 Correct 0 ms 384 KB Output is correct
22 Correct 0 ms 384 KB Output is correct
23 Correct 0 ms 384 KB Output is correct
24 Correct 0 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 0 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 0 ms 384 KB Output is correct
30 Correct 0 ms 384 KB Output is correct
31 Correct 0 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1536 KB Output is correct
2 Correct 2 ms 1536 KB Output is correct
3 Correct 2 ms 1536 KB Output is correct
4 Correct 2 ms 1536 KB Output is correct
5 Correct 2 ms 1536 KB Output is correct
6 Correct 2 ms 1536 KB Output is correct
7 Correct 2 ms 1536 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 2 ms 1184 KB Output is correct

Subtask #4
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 12032 KB Output is correct
2 Correct 15 ms 12032 KB Output is correct
3 Correct 15 ms 12032 KB Output is correct
4 Correct 18 ms 12032 KB Output is correct
5 Correct 15 ms 12032 KB Output is correct
6 Correct 13 ms 8960 KB Output is correct
7 Correct 14 ms 10240 KB Output is correct
8 Correct 7 ms 768 KB Output is correct
9 Correct 9 ms 3328 KB Output is correct
10 Correct 16 ms 10368 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 35096 KB Output is correct
2 Correct 44 ms 35344 KB Output is correct
3 Correct 44 ms 35348 KB Output is correct
4 Correct 45 ms 35348 KB Output is correct
5 Correct 45 ms 35348 KB Output is correct
6 Correct 41 ms 31636 KB Output is correct
7 Correct 42 ms 29588 KB Output is correct
8 Correct 20 ms 1564 KB Output is correct
9 Correct 20 ms 1588 KB Output is correct
10 Correct 40 ms 29204 KB Output is correct
11 Correct 42 ms 35476 KB Output is correct
12 Correct 22 ms 4636 KB Output is correct