Submission #448239

#	Time	Username	Problem	Language	Result	Execution time	Memory
448239		prvocislo	Vim (BOI13_vim)	C++17	100 / 100	116 ms	55048 KiB

vim

#include <iostream>
#include <vector>
#include <string>
using namespace std;

const int abc = 11, inf = 1e9 + 5;
void upd(int& a, const int& b) { a = min(a, b); }
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n; cin >> n;
    string s;
    cin >> s;
    int cnte = 0;
    vector<int> t; vector<bool> u;
    for (int i = 0; i < n; i++)
    {
        if (s[i] == 'e') cnte++;
        else
        {
            t.push_back(s[i] - 'a');
            u.push_back(i && s[i - 1] == 'e');
        }
        //if (s[i] == 'e') cout << 2;
        //else cout << (int)u.back();
    } //cout << endl;
    t.push_back(abc - 1), u.push_back(false);
    int m = t.size();
    vector<vector<int> > p(m, vector<int>(abc, inf));
    vector<vector<vector<int> > > q(m, vector<vector<int> >(abc, vector<int>(abc, inf)));
    p[0][t[0]] = q[0][t[0]][t[0]] = 0;
    for (int a = 0; a < m - 1; a++)
    {
        for (int c = 0; c < abc; c++)
        {
            if (!u[a] && c != t[a]) upd(p[a + 1][c], p[a][c]);
            upd(p[a + 1][c], p[a][t[a]] + 2);
            if (c != t[a]) upd(p[a + 1][c], q[a][t[a]][c]);
            upd(p[a + 1][c], q[a][t[a]][t[a]] + 2);
            for (int d = 0; d < abc; d++)
            {
                if (c != t[a]) upd(q[a + 1][c][d], p[a][c] + 3);
                upd(q[a + 1][c][d], p[a][t[a]] + 5);
                if (c != t[a] && d != t[a]) upd(q[a + 1][c][d], q[a][c][d] + 1);
                if (c != t[a]) upd(q[a + 1][c][d], q[a][c][t[a]] + 3);
                if (d != t[a]) upd(q[a + 1][c][d], q[a][t[a]][d] + 3);
                upd(q[a + 1][c][d], q[a][t[a]][t[a]] + 5);
            }
        }
    }
    cout << p[m - 1][abc - 1] - 2 + cnte * 2 << "\n";
    return 0;
}

• Subtask 1: 50 / 50
• Subtask 2: 10 / 10
• Subtask 3: 40 / 40