Submission #1153563

#	Time	Username	Problem	Language	Result	Execution time	Memory
1153563		Ludissey	Nautilus (BOI19_nautilus)	C++20	0 / 100	2 ms	320 KiB

nautilus

#include <bits/stdc++.h>
#define int long long
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
 
using namespace std;
const int MAXC=9;
signed main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int R,C,M; cin >> R >> C >> M;
    vector<bitset<MAXC>> grid(R,0);
    vector<bitset<MAXC>> grid1(R,0);
    vector<bitset<MAXC>> gridORIG(R,0);
    for (int i = 0; i < R; i++)
    {
        string s; cin >> s;
        grid[i]=0;
        for (int j = 0; j < C; j++)
        {
            if(s[j]=='.') grid[i].set(j);
            if(s[j]=='.') grid1[i].set(j);
            if(s[j]=='.') gridORIG[i].set(j);
        }
    }
    string s; cin >> s;
    for (int i = 0; i < M; i++)
    {
        if(s[i]=='S'){
            for (int j = R-1; j > 0; j--)
            {
                grid[j]=gridORIG[j]&grid1[j-1];
            }
            grid[0]=0;
        }else if(s[i]=='N'){
            for (int j = 0; j < R-1; j++)
            {
                grid[j]=gridORIG[j]&grid1[j+1];
            }
            grid[R-1]=0;
        }else if(s[i]=='W'){
            for (int j = R-1; j >= 0; j--)
            {
                grid[j]=gridORIG[j]&(grid1[j]>>1);
            }
        }else if(s[i]=='E'){
            for (int j = R-1; j >= 0; j--)
            {
                grid[j]=gridORIG[j]&(grid1[j]<<1);
            }
        }else{
            for (int j = R-1; j >= 0; j--)
            {
                if(j==0){
                    grid[j]=(grid1[j+1]|(grid1[j]<<1)|(grid1[j]>>1))&gridORIG[j];
                }else if(j==R-1){
                    grid[j]=(grid1[j-1]|(grid1[j]<<1)|(grid1[j]>>1))&gridORIG[j];
                }else{
                    grid[j]=(grid1[j-1]|grid1[j+1]|(grid1[j]<<1)|(grid1[j]>>1))&gridORIG[j];
                }
            }
        }
        swap(grid,grid1);
    }
    int ans=0;
    for (int j = R-1; j >= 0; j--) ans+=grid1[j].count();
    cout << ans << "\n";
    return 0;
}

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