Submission #313720

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
313720	2020-10-16 20:03:43	bigg	Palindromic Partitions (CEOI17_palindromic)	C++14	100 / 100	523 ms	42732 KiB

palindromic

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#include<bits/stdc++.h>
using namespace std;
const int MAXN = 1e6 + 10;
typedef long long ll;
ll hash1[MAXN], hash2[MAXN];
ll pp1[MAXN], pp2[MAXN];
ll p1 = 37, p2 = 101;
pair<ll, ll>  subhash(int i, int j){
  return make_pair(hash1[i] - (j ? hash1[j - 1] * pp1[i - j + 1] : 0),
           hash2[i] - (j ? hash2[j - 1] * pp2[i - j + 1] : 0));
}
string s;
int n;
void resetandin(){
  cin >> s;
  n = s.length();
  hash1[0] = hash2[0] = s[0];
  for(int i = 1; i < n; i ++){
    hash1[i] = hash1[i-1] * p1 + s[i];
    hash2[i] = hash2[i-1] * p2 + s[i];
  }
}
int main(){
  pp1[0] = pp2[0] = 1;
  for(int i = 1; i < MAXN; i++){
    pp1[i] = pp1[i-1] * p1;
    pp2[i] = pp2[i-1] * p2;
  }
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 25 / 25
• Subtask 4: 40 / 40