Submission #475898

#	Time	Username	Problem	Language	Result	Execution time	Memory
475898		fadi57	Nautilus (BOI19_nautilus)	C++14	100 / 100	188 ms	968 KiB

nautilus

#include<bits/stdc++.h>
using namespace std;
const int mx=505;
typedef long long ll;
int mod=998244353 ;
const int MXm=22;
#define F first
#define S second
const int inf=1e9+10;

bitset<mx> dp[mx];
bitset<mx> dp2[mx];//the previous
bitset<mx>row[mx];
char ss[mx][mx];
string s;
void solve(){
int n,m,k;
cin>>n>>m>>k;
for(int i =0;i<n;i++){

    for(int j=0;j<m;j++){

        cin>>ss[i][j];
        if(ss[i][j]=='.'){

            dp[i][j]=1;
            row[i][j]=1;
        }
    }

}
cin>>s;
 for(int i=1;i<=k;i++){

        for(int i=0;i<n;i++){
            dp2[i]=dp[i];
            dp[i]&=0;
        }
    if(s[i-1]=='N'||s[i-1]=='?'){
              for(int j=0;j<n;j++){

                dp[j]|=(dp2[j+1]&row[j]);

              }

            }
             if(s[i-1]=='S'||s[i-1]=='?'){

            for(int j=1;j<n;j++){

         dp[j]|=(dp2[j-1]&row[j]);

            }

            }
            if(s[i-1]=='E'||s[i-1]=='?'){

              for(int j=0;j<n;j++){


             dp[j]|=((dp2[j]<<1)&row[j]);
              }

            }
             if(s[i-1]=='W'||s[i-1]=='?'){

               for(int j=0;j<n;j++){

        dp[j]|=((dp2[j]>>1)&row[j]);

               }

            }

  }

ll ans=0;
for(int i =0;i<n;i++){

    ans+=dp[i].count();

}

cout<<ans;
return;
 }
 int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
	 int t;t=1;
	 while(t--){

   solve();


	 }


	}

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