Submission #1148620

#	Time	Username	Problem	Language	Result	Execution time	Memory
1148620		gazizmadi11	Nautilus (BOI19_nautilus)	C++20	100 / 100	120 ms	912 KiB

nautilus

//gm  --- akezhon
#include <bits/stdc++.h>
// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define pb push_back
#define pf push_front
#define F first
#define S second
#define all(v) v.begin(),v.end()
#define pii pair<int,int>
#define tm (tl+tr)/2
#define TL v+v, tl, tm
#define TR v+v+1, tm+1, tr
#define DA l <= tl && tr <= r
#define NE r < tl || tr < l
#define double long double
// #define int long long 
using namespace std;

const int N=1e5+7;
const int mod=998244353;
// const int inf=2e18;

bitset<505>b[505], temp[505], temp2[505], temp3[505], temp4[505], good[505];

void AlemAmenov(){
	int n, m, k;
	string s;
	cin >> n >> m >> k;
	string a[n+1];
	for(int i=0; i < n; i++){
		cin >> a[i];
		for(int j=0; j < m; j++){
			if(a[i][j]=='.')good[i][j]=1, b[i][j]=1;
		}
	}
	cin >> s;
	for(char c : s){
		if(c=='N'){
			for(int i=0; i < n-1; i++){
				b[i] = b[i+1] & good[i];
			}
			b[n-1].reset();
		}
		else if(c=='S'){
			for(int i=n-1; i >= 1; i--){
				b[i] = b[i-1] & good[i];
			}
			b[0].reset();
		}
		else if(c=='W'){
			for(int i=0; i < n; i++){
				b[i] = (b[i] >> 1);
				b[i][m-1] = 0;
				b[i] &= good[i];
			}
		}
		else if(c=='E'){
			for(int i=0; i < n; i++){
				b[i] = (b[i] << 1);
				b[i][0] = 0;
				b[i] &= good[i];
			}
		}
		else{
			for(int i=0; i < n-1; i++){
				temp[i] = b[i+1];
			}
			temp[n-1].reset();
			for(int i=1; i < n; i++){
				temp4[i] = b[i-1];
			}
			temp4[0].reset();
			for(int i=0; i < n; i++){
				temp2[i] = (b[i] >> 1);
				temp2[i][m-1] = 0;
				
				temp3[i] = (b[i] << 1);
				temp3[i][0] = 0;
			}
			for(int i=0; i < n; i++){
				b[i] = (temp[i] | temp2[i] | temp3[i] | temp4[i]) & good[i];
			}
		}
	}
	int ans=0;
	for(int i=0; i < n; i++){
		ans += b[i].count();
	}
	cout << ans;
}
signed main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int RealName=1;
    // cin >> RealName;

    // freopen("connect.in", "r", stdin);
    // freopen("connect.out", "w", stdout);

    while(RealName--)
        AlemAmenov();
    
return 0;
}

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