Submission #419999

#	Time	Username	Problem	Language	Result	Execution time	Memory
419999		ScarletS	Nautilus (BOI19_nautilus)	C++17	66 / 100	1089 ms	588 KiB

nautilus

#include <bits/stdc++.h>
using namespace std;

const int N = 505, K = 5005;
bitset<N> dp[2][N];
char c[N][N];
string s;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n,m,k;
    cin>>n>>m>>k;
    for (int i=1;i<=n;++i)
        for (int j=1;j<=m;++j)
        {
            cin>>c[i][j];
            dp[0][i][j]=(c[i][j]=='.');
        }
    cin>>s;
    for (auto x : s)
    {
        for (int i=1;i<=n;++i)
            for (int j=1;j<=m;++j)
            {
                if (c[i][j]=='#')
                    dp[1][i][j]=0;
                else if (x=='N')
                    dp[1][i][j]=dp[0][i+1][j];
                else if (x=='S')
                    dp[1][i][j]=dp[0][i-1][j];
                else if (x=='E')
                    dp[1][i][j]=dp[0][i][j-1];
                else if (x=='W')
                    dp[1][i][j]=dp[0][i][j+1];
                else
                    dp[1][i][j]=(dp[0][i+1][j]|dp[0][i-1][j]|dp[0][i][j-1]|dp[0][i][j+1]);
            }
        for (int i=1;i<=n;++i)
            for (int j=1;j<=m;++j)
                dp[0][i][j]=dp[1][i][j];
    }
    int ans = 0;
    for (int i=1;i<=n;++i)
        ans+=dp[0][i].count();
    cout<<ans;
    return 0;
}

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