Submission #990724

#	Time	Username	Problem	Language	Result	Execution time	Memory
990724		vjudge1	Palinilap (COI16_palinilap)	C++17	17 / 100	1074 ms	856 KiB

palinilap

#include<bits/stdc++.h>

using namespace std;

int w(string s)
{
  int ans = 0, n = s.size();
  for(int i = 0; i < n; i ++)
    {
      int cnt = 1;
      int l = i - 1, r = i + 1;
      while(l >= 0 && r < n)
	{
	  if(s[l] == s[r])
	    cnt++, l--, r++;
	  else
	    break;
	}
      ans += cnt;
    }

  for(int i = 0; i + 1 < n; i ++)
    {
      if(s[i] != s[i + 1]) continue;
      int cnt = 1;
      int l = i - 1, r = i + 2;
      while(l >= 0 && r < n)
	{
	  if(s[l] == s[r])
	    cnt++, l--, r++;
	  else
	    break;
	}
      ans += cnt;
    }
  return ans;
  
}

int main()
{
  int ans = 0, n;
  string s;
  cin >> s;
  n = s.size();
  ans = w(s);
  for(int i = 0; i < n; i ++)
    {
      char c = s[i];
      for(char nc = 'a'; nc <= 'z'; nc ++)
	{
	  if(c == nc) continue;
	  s[i] = nc;
	  ans = max(ans, w(s));
	}
      s[i] = c;
    }
  cout << ans << endl;
  return 0;
}

• Subtask 1: 17 / 17
• Subtask 2: 0 / 37
• Subtask 3: 0 / 46