Submission #1166474

#	Time	Username	Problem	Language	Result	Execution time	Memory
1166474		irmuun	Nautilus (BOI19_nautilus)	C++20	100 / 100	124 ms	544 KiB

nautilus

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int r,c,m;
    cin>>r>>c>>m;
    vector<bitset<500>>a(r),b(r);
    for(ll i=0;i<r;i++){
        for(int j=0;j<c;j++){
            char s;
            cin>>s;
            if(s=='#'){
                a[i][j]=0;
                b[i][j]=0;
            }
            else{
                a[i][j]=1;
                b[i][j]=1;
            }
        }
    }
    string s;
    cin>>s;
    for(int i=0;i<m;i++){
        vector<bitset<500>>f(r);
        if(s[i]=='N'||s[i]=='?'){//x--
            for(int x=1;x<r;x++){
                f[x-1]|=a[x];
            }
        }
        if(s[i]=='S'||s[i]=='?'){//x++
            for(int x=0;x<r-1;x++){
                f[x+1]|=a[x];
            }
        }
        if(s[i]=='W'||s[i]=='?'){//y--
            for(int x=0;x<r;x++){
                f[x]|=(a[x]>>1);
            }
        }
        if(s[i]=='E'||s[i]=='?'){//y++
            for(int x=0;x<r;x++){
                f[x]|=(a[x]<<1);
            }
        }
        for(int x=0;x<r;x++){
            a[x]=(f[x]&b[x]);
        }
    }
    int ans=0;
    for(int i=0;i<r;i++){
        for(int j=0;j<c;j++){
            if(a[i][j]) ans++;
        }
    }
    cout<<ans;
}

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