Submission #921439

#	Time	Username	Problem	Language	Result	Execution time	Memory
921439		aykhn	Nautilus (BOI19_nautilus)	C++17	0 / 100	2 ms	600 KiB

nautilus

#include <bits/stdc++.h>
 
// author: aykhn

using namespace std;

#define int long long
#define inf 0x3F3F3F3F

const int MXN = 20;

int n, m, K;
char mat[MXN][MXN];
string s;
bitset<MXN> dp[2][MXN], ok[MXN], x;

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    cin >> n >> m >> K;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < m; j++) 
        {
            cin >> mat[i][j];
            if (mat[i][j] != '#') ok[i].set(j, 1), dp[0][i].set(j, 1);
        }
        // for (int j = 0; j < m; j++) cout << dp[0][i][j];
        // cout << '\n';
    }
    cin >> s;
    s = "#" + s;
    int ind = 1;
    for (int k = 1; k <= K; k++)
    {
        for (int i = 0; i < n; i++)
        {
            dp[ind][i] = x;
            if (i && (s[k] == 'S' || s[k] == '?')) dp[ind][i] |= dp[1 - ind][i - 1];
            if (i + 1 < n && (s[k] == 'N' || s[k] == '?')) dp[ind][i] |= dp[1 - ind][i + 1];
            if (s[k] == 'W' || s[k] == '?') dp[ind][i] |= dp[1 - ind][i] >> 1;
            if (s[k] == 'E' || s[k] == '?') dp[ind][i] |= dp[1 - ind][i] << 1;
            dp[ind][i] &= ok[i];
        }
        ind ^= 1;
    }
    int res = 0;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < m; j++)
        {
            res += dp[K & 1][i][j];
        }
    }
    cout << res << '\n';
}

• Subtask 1: 0 / 29
• Subtask 2: 0 / 37
• Subtask 3: 0 / 34