Submission #1036004

#	Time	Username	Problem	Language	Result	Execution time	Memory
1036004		ByeWorld	Nautilus (BOI19_nautilus)	C++14	100 / 100	144 ms	1024 KiB

nautilus

#include <bits/stdc++.h>
// #pragma GCC optimize("O3", "unroll-loops")
#define ll long long
#define int long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii, int> ipii;
const int MAXN = 26e4;
const int MAXK = 110;
const int INF = 1e9+10;
const int LOG = 19;
const int MOD = 998244353;
const int SQRT = 450;
void chmn(int &a, int b){ a = min(a, b); }

int n, m, k;
bitset <MAXN> ma, ans, te;

signed main(){
    cin >> n >> m >> k;
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            char x; cin >> x;
            if(x=='.') ma[i*(m+1)+j] = 1;
        }
    }
    ans = ma;
    string s; cin >> s;
    for(int i=0; i<k; i++){
        if(s[i]=='?'){
            ans = ((ans<<(m+1)) | (ans>>(m+1)) | (ans<<1) | (ans>>1)) & ma;
        } else if(s[i]=='E'){
            ans = (ans<<1) & ma;
        } else if(s[i]=='W'){
            ans = (ans>>1) & ma;
        } else if(s[i]=='S'){
            ans = (ans<<(m+1)) & ma;
        } else if(s[i]=='N'){
            ans = (ans>>(m+1)) & ma;
        }
    }
    cout << ans.count() << '\n';
}

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