Submission #166015

#	Time	Username	Problem	Language	Result	Execution time	Memory
166015		oolimry	JOIOJI (JOI14_joioji)	C++14	100 / 100	80 ms	6304 KiB

joioji

#include <bits/stdc++.h>
using namespace std;
int main(){
  ios_base::sync_with_stdio(false);
  int n;
  cin >> n;
  string s;
  cin >> s;
  int I = 0;
  int J = 0;
  int O = 0;
  typedef pair<int,int> ii;
  map<ii,int> m;
  for(int i = 0;i < n;i++){
    if(s[i] == 'I') I++;
    else if(s[i] == 'O') O++;
    else J++;
    m[ii(O-J,O-I)] = i;
  }
  I = 0, J = 0, O = 0;
  int ans = 0;
  for(int i = 0;i < n;i++){
    if(m.find(ii(O-J,O-I)) != m.end() && m[ii(O-J,O-I)] > i)
      ans = max(ans,m[ii(O-J,O-I)] - i + 1);
    if(s[i] == 'I') I++;
    else if(s[i] == 'O') O++;
    else J++;
  }
  cout << ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 80 / 80