제출 #41621

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
41621		funcsr	회문 (APIO14_palindrome)	C++14	0 / 100	1075 ms	53000 KiB

palindrome

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cassert>
#include <map>
using namespace std;
#define int long long
typedef pair<int, int> P;
#define rep(i, n) for (int i=0; i<(n); i++)
#define all(x) x.begin(), x.end()
#define uniq(x) x.erase(unique(all(x)), x.end())
#define index(x, y) (int)(lower_bound(all(x), y) - x.begin())
#define _1 first
#define _2 second
#define pb push_back
#define MOD 1000000007
const int B = 123;

string S;
int N;
map<int, int> C[300001];
signed main() {
  cin >> S;
  N = S.length();
  rep(l, N) {
    int h = 0;
    for (int r=l; r<N; r++) {
      h = (B*h+S[r]) % MOD;
      C[r-l+1][h]++;
    }
  }
  long long m = 0;
  for (int len=1; len<=N; len++) {
    for (P p : C[len]) {
      m = max(m, 1LL*len*p._2);
    }
  }
  cout << m << "\n";
  return 0;
}

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• Subtask 2: 0 / 15
• Subtask 3: 0 / 24
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