oj.uz

Submission #902601

# Submission time Handle Problem Language Result Execution time Memory
902601 2024-01-10T19:55:26 Z joelgun14 Palindromic Partitions (CEOI17_palindromic) C++17
100 / 100
 53 ms 12936 KB 
// header file
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
// pragma
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
// macros
#define endl "\n"
#define ll long long
#define mp make_pair
#define ins insert
#define lb lower_bound
#define pb push_back
#define ub upper_bound
#define lll __int128
#define fi first
#define se second
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_multiset;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
int main() {
    ios_base::sync_with_stdio(0); cin.tie(NULL);
    int t;
    cin >> t;
    int mod = 1e9 + 9;
    mt19937 rng(chrono::steady_clock().now().time_since_epoch().count());
    while(t--) {
      string s;
      cin >> s;
      int n = s.size();
      s = " " + s;
      ll pre = 0, suff = 0, suffpow = 1;
      // do hashing prefix suffix
      // if we can find a match, directly match
      int cnt = 0;
      int key = rng() % mod;
      for(int i = 1; i <= (n / 2); ++i) {
        pre = ((pre * key) % mod + s[i]) % mod;
        suff = (suff + (suffpow * s[n - i + 1]) % mod) % mod;
        suffpow = (suffpow * key) % mod;
        if(pre == suff) {
          pre = 0, suff = 0, suffpow = 1;
          cnt += 2;
        }
      }
      if(pre != 0)
        ++cnt;
      else if(pre == 0 && (n & 1))
        ++cnt;
      cout << cnt << endl;
    }
    return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 1 ms 344 KB Output is correct
7 Correct 0 ms 456 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 0 ms 348 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 1 ms 344 KB Output is correct
7 Correct 0 ms 456 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 348 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 1 ms 344 KB Output is correct
7 Correct 0 ms 456 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 47 ms 12936 KB Output is correct
15 Correct 31 ms 7920 KB Output is correct
16 Correct 53 ms 11872 KB Output is correct
17 Correct 26 ms 7060 KB Output is correct