Submission #615684

#	Time	Username	Problem	Language	Result	Execution time	Memory
615684		Hanksburger	Nautilus (BOI19_nautilus)	C++17	100 / 100	219 ms	852 KiB

nautilus

#include <bits/stdc++.h>
using namespace std;
bitset<255025> a, b;
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, m, q;
    cin >> n >> m >> q;
    for (int i=0; i<n; i++)
    {
        for (int j=0; j<m; j++)
        {
            char x;
            cin >> x;
            a[i*505+j]=b[i*505+j]=x=='.';
        }
    }
    for (int i=0; i<q; i++)
    {
        char x;
        cin >> x;
        if (x=='E')
            b<<=1;
        else if (x=='W')
            b>>=1;
        else if (x=='S')
            b<<=505;
        else if (x=='N')
            b>>=505;
        else
            b=(b<<1)|(b>>1)|(b<<505)|(b>>505);
        b&=a;
    }
    cout << b.count();
    return 0;
}

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