Submission #230645

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
230645	2020-05-10 18:43:39	islingr	Palindromic Partitions (CEOI17_palindromic)	C++14	100 / 100	109 ms	22160 KiB

palindromic

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#include <iostream>
using namespace std;
#define rep(i, a, b) for (auto i = (a); i < (b); ++i)
#define trav(x, v) for (auto &x : v)
#define sz(x) int((x).size())
using ll = long long;
constexpr ll p = 5, M = 1e9 + 7, N = 1 << 20;
string s; int n;
ll pp[N], pref[N];
void init() {
  rep(i, 0, n) pref[i + 1] = (pref[i] + pp[i] * (s[i] - 'a' + 1)) % M;
}
ll hsh(int l, int r) { // [l, r]
  int ret = pref[r + 1] - pref[l];
  ret = ret * pp[n - l] % M;
  if (ret < 0) ret += M;
  return ret;
}
int solve() {
  cin >> s; n = sz(s);
  init();
  int cnt = 0;
  int x = 0, y = n - 1;
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 25 / 25
• Subtask 4: 40 / 40