Submission #828608

#	Time	Username	Problem	Language	Result	Execution time	Memory
828608		arashMLG	Nautilus (BOI19_nautilus)	C++17	100 / 100	134 ms	896 KiB

nautilus

#include<bits/stdc++.h>
#ifdef LOCAL
#include "Essentials/algo/debug.h"
#else
#define debug(...) 69
#endif
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

//https://quera.org/profile/4dykhk

typedef long long     ll;
typedef long double   ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll>   pll;

const int N = 500 + 23;
const ll mod = 1e9+7; // 998244353
const int LOG = 23;
const ll inf = 1e18;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

#define F           first
#define S           second
#define pb          push_back
#define ms(x,y)     memset((x) , (y) , sizeof (x))
#define done        return cout<<endl , 0;
#define kill(x)     cout<<x<<endl, exit(0);
#define isIn(x,s,e) ((x) >= (s) && (x) <= e)
#define all(x)      x.begin(),x.end()
#define sz(x)       (int)x.size()
#define pc(x)       __builtin_popcount(x)
#define ctz(x)      __builtin_ctz(x)
#define MinHeap(x)  priority_queue<x, vector<x> , greater<x> >
#define MaxHeap(x)  priority_queue<x, vector<x>>
#define lc          (v << 1)
#define rc          ((v<<1) |1)
#define int         ll

ll pw(ll a, ll b, ll md = mod){ll res = 1; while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}


int n,m,k;
bitset<N*N> ok,dp;

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(false);
   	cin>>n>>m>>k;
   	for(int i = 0 ; i < n ; i++) {
		for(int j = 0 ;j < m;j ++) {
			char c; cin>>c; 
			ok[i*N + j] = c == '.';
		}
	}
	dp = ok;
	for(int i = 0 ;i < k; i ++) {
		char c; cin>>c;
		if(c == 'E') dp = (dp << 1);
		if(c == 'W') dp = (dp >> 1);
		if(c == 'N') dp = (dp >> N);
		if(c == 'S') dp = (dp << N);
		if(c == '?') dp = ((dp << 1) | (dp >> 1) | (dp >> N) | (dp << N));
		dp = dp & ok;
	}
	cout<<dp.count();
	done;
}

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