제출 #465016

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
465016		myvaluska	새로운 문제 (POI11_roz)	C++14	0 / 100	339 ms	2172 KiB

roz

// palindromefree.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
//long long int cifra[20];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;
    string s;
    cin >> s;
    vector<vector<int>>mini(26, vector<int>(26, 1000000036));
    vector<vector<int>>prefix(26, vector<int>(26));
    vector<vector<int>>posledny(26, vector<int>(26));
    int vys = 0;
    for (int i = 0; i < n; i++)
    {
        int pismeno = s[i] - 'a';
        for (int j = 0; j < 26; j++)
        {
            if (s[i]-'a' == j)
            {

            }
            else
            {
                prefix[s[i] - 'a'][j] += 1;
                vys = max(vys, prefix[pismeno][j] - mini[pismeno][j]);
                prefix[j][pismeno] -= 1;
                mini[j][pismeno] = min(prefix[j][pismeno],posledny[j][s[i]-'a']);
                posledny[j][pismeno] = prefix[j][pismeno];
                vys = max(vys, prefix[j][pismeno] - mini[j][pismeno]);
            }
        }
    }
    /*for (int i = 0; i < 26; i++)
    {
        for (int j = 0; j < 26; j++)
        {
            cout << prefix[i][j];
            if (j < 25)
            {
                cout << ' ';
            }
            else
            {
                cout << endl;
            }
        }
    }*/
    cout << vys << endl;
    return 0;
    //std::cout << "Hello World!\n";
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file

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