Submission #1126698

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126698		FucKanh	Nautilus (BOI19_nautilus)	C++20	66 / 100	11 ms	4164 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;
int a[maxn][maxn], fix[maxn][maxn];
string s;

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

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

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

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

        int ans = 0;
        for (int x = 1; x <= n; x++) {
            for (int y = 1; y <= m; y++) {
                ans += a[x][y];
            }
        }
        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][j] = a[i][j] = 1;
        }
    }
    cin >> s;
    if (n <= 100 && m <= 100 && q <= 100) SUB1::solve();
}

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

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