Submission #944029

#	Time	Username	Problem	Language	Result	Execution time	Memory
944029		pcc	Nautilus (BOI19_nautilus)	C++17	100 / 100	139 ms	856 KiB

nautilus

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>


const int mxn = 505;
bitset<mxn> dp[2][mxn];
bitset<mxn> mask[mxn];
int N,M,L;
string s;

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>N>>M>>L;
	for(int i = 0;i<N;i++){
		string ss;
		cin>>ss;
		for(int j = 0;j<M;j++){
			mask[i][j] = (ss[j] == '#'?0:1);
		}
		dp[0][i] = mask[i];
	}
	cin>>s;
	bool roll = 0;
	for(auto it = s.begin();it != s.end();it++){
		roll ^= 1;
		for(int i = 0;i<N;i++)dp[roll][i].reset();
		if(*it == 'W'||*it == '?'){
			for(int i = 0;i<N;i++){
				dp[roll][i] |= (dp[roll^1][i]>>1);
			}
		}
		if(*it == 'E'||*it == '?'){
			for(int i = 0;i<N;i++){
				dp[roll][i] |= (dp[roll^1][i]<<1);
			}
		}
		if(*it == 'N'||*it == '?'){
			for(int i = 0;i+1<N;i++){
				dp[roll][i] |= dp[roll^1][i+1];
			}
		}
		if(*it == 'S'||*it == '?'){
			for(int i = 1;i<N;i++){
				dp[roll][i] |= dp[roll^1][i-1];
			}
		}
		for(int i = 0;i<N;i++)dp[roll][i] &= mask[i];
		/*
		for(int i = 0;i<N;i++){
			for(int j = 0;j<M;j++)cout<<(dp[roll][i][j]?1:0);cout<<endl;
		}cout<<endl;

	   */
	}
	int ans = 0;
	for(int i = 0;i<N;i++){
		for(int j = 0;j<M;j++)ans += (dp[roll][i][j]?1:0);
	}
	cout<<ans;
}

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