Submission #639601

#	Time	Username	Problem	Language	Result	Execution time	Memory
639601		erto	Nautilus (BOI19_nautilus)	C++17	100 / 100	147 ms	676 KiB

nautilus

#include <bits/stdc++.h>
typedef long long int ll;
#define INF ll(1e9 + 7)
#define INF2 998244353
#define N (ll)(1e5 + 5)
using namespace std;
#define int ll
#define lsb(x) (x & (-x))
 
int r, c, m, g, h; 
string s;
bitset<502> a[502], pos[502], t[502];
bitset<502> t1, t2;

 
int d1[] = {0, 0, 1, -1}, d2[] = {1, - 1, 0, 0};



void solve(){
    cin >> r >> c >> m;
    for(int i=1; i<=r; i++){
        cin >> s;
        for(int j=1; j<=c; j++){
            a[i][j] = s[j - 1] == '.';
            pos[i][j] = a[i][j];
        }
    }
    cin >> s;

    for(int i=0; i<m; i++){
        if(s[i] == '?'){
            for(int n=1; n<=r; n++){
                t1 = a[n] >> 1;
                t2 = a[n] << 1;
                t[n] |= t1;
                t[n] |= t2;
            }
            for(int n=1; n<r; n++){
                t[n] |= a[n + 1];
                t[n + 1] |= a[n];
            }
            for(int i=1; i<=r; i++){
                a[i] = t[i] & pos[i];
                t[i] &= 0;
            }
        }
        else if(s[i] == 'W'){
            for(int n=1; n<=r; n++){
                a[n] = a[n] >> 1;
                a[n] &= pos[n];
            }
        }
        else if(s[i] == 'E'){
            for(int n=1; n<=r; n++){
                a[n] = a[n] << 1;
                a[n] &= pos[n];
            }
        }
        else if(s[i] == 'S'){
            for(int n=r; n; n--){
                a[n] |= a[n - 1];
                a[n] &= a[n - 1];
                a[n] &= pos[n];
            }
        }
        else{
            for(int n=1; n<=r; n++){
                a[n] |= a[n + 1];
                a[n] &= a[n + 1];
                a[n] &= pos[n];
            }
        }
       
    }
    int sum = 0;
    for(int n=r; n; n--){
        for(int l=1; l<=c; l++){
            sum += a[n][l];
        }
    }
    cout << sum;
}
 
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int T = 1;
    //cin>>T;
    while (T--){
        solve();
    }
}

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