Submission #1126703

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126703		FucKanh	Nautilus (BOI19_nautilus)	C++20	100 / 100	145 ms	552 KiB

nautilus

#include<bits/stdc++.h>
#define ll long long
#define int ll
#define pii pair<int,int>

using namespace std;

const int maxn = 505;

int n,m,q;
bitset<maxn> a[maxn], fix[maxn];
string s;

namespace SUB1 {
    int b[maxn][maxn];
    void solve() {
        for (int i = 1; i <= q; i++) {

            if (s[i-1] == 'W') {
                for (int x = 1; x <= n; x++) {
                    for (int y = 1; y <= m; y++) {
                        b[x][y] = a[x][y+1];
                    }
                }
            }
            else if (s[i-1] == 'E') {
                for (int x = 1; x <= n; x++) {
                    for (int y = 1; y <= m; y++) {
                        b[x][y] = a[x][y-1];
                    }
                }
            }
            else if (s[i-1] == 'S') {
                for (int x = 1; x <= n; x++) {
                    for (int y = 1; y <= m; y++) {
                        b[x][y] = a[x-1][y];
                    }
                }
            }
            else if (s[i-1] == 'N') {
                for (int x = 1; x <= n; x++) {
                    for (int y = 1; y <= m; y++) {
                        b[x][y] = a[x+1][y];
                    }
                }
            }
            else {
                for (int x = 1; x <= n; x++) {
                    for (int y = 1; y <= m; y++) {
                        b[x][y] = a[x-1][y] || a[x+1][y] || a[x][y-1] || a[x][y+1];
                    }
                }
            }

            for (int x = 1; x <= n; x++) {
                for (int y = m; y >= 1; y--) {
                    cout << a[x][y] <<  " ";
                } cout << endl;
            } cout << endl;

            for (int x = 1; x <= n; x++) {
                for (int y = 1; y <= m; y++) {
                    a[x][y] = b[x][y] && fix[x][y];
                }
            }

            for (int x = 1; x <= n; x++) {
                for (int y = m; y >= 1; y--) {
                    cout << a[x][y] <<  " ";
                } cout << endl;
            } cout << endl;
        }

        int ans = 0;
        for (int x = 1; x <= n; x++) {
            for (int y = 1; y <= m; y++) {
                ans += a[x][y];
            }
        }
        cout << ans;
    }
}

namespace SUB2 {
    bitset<maxn> b[maxn];
    void solve() {
        for (int i = 1; i <= q; i++) {
            if (s[i-1] == 'W') {
                for (int x = 1; x <= n; x++) {
                    b[x] = (a[x] << 1) & fix[x];
                }
            }
            else if (s[i-1] == 'E') {
                for (int x = 1; x <= n; x++) {
                    b[x] = (a[x] >> 1) & fix[x];
                }
            }
            else if (s[i-1] == 'S') {
                for (int x = 1; x <= n; x++) {
                    b[x] = a[x-1] & fix[x];
                }
            }
            else if (s[i-1] == 'N') {
                for (int x = 1; x <= n; x++) {
                    b[x] = a[x+1] & fix[x];
                }
            }
            else {
                for (int x = 1; x <= n; x++) {
                    b[x] = (a[x+1] | a[x-1] | (a[x] << 1) | (a[x] >> 1)) & fix[x];
                }
            }

            for (int x = 1; x <= n; x++) a[x] = b[x];
        }

        int ans = 0;
        for (int x = 1; x <= n; x++) {
            ans += a[x].count();
        }
        cout << ans;
    }
}

void solve() {
    cin >> n >> m >> q;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            char c; cin >> c;
            if (c == '.') fix[i][m-j+1] = a[i][m-j+1] = 1;
        }
    }
    cin >> s;
    SUB2::solve();
}

signed main() {
    cin.tie(0) -> sync_with_stdio(0);
    solve();
    return 0;
}

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