Submission #890003

#	Time	Username	Problem	Language	Result	Execution time	Memory
890003		vjudge1	Nautilus (BOI19_nautilus)	C++17	29 / 100	2 ms	348 KiB

nautilus

//order_of_key(k): Number of items strictly smaller than k .
//find_by_order(k): K-th element in a set (counting from zero).

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

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

#define file(s) if(fopen(s".in","r")) freopen(s".in","r",stdin);freopen(s".out","w",stdout)
#define all(x) (x).begin(), (x).end()
#define len(x) (int)x.size()
#define tm (tl + tr >> 1)
#define ls v << 1, tl, tm
#define rs v << 1 | 1, tm + 1, tr
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define elif else if
#define F first
#define S second
#define int long long

using namespace std;
using namespace __gnu_pbds;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
typedef unsigned long long ull;
typedef long long ll;
typedef double db;
typedef long double ld;

const int MOD = 1e9 + 7;
const int N = 2e5 + 7;
const int P = 911;
const ll INF = 1e18;

int rnd() {
	int x = rand() << 15;
	return x ^ rand();
}

int n, m;
char a[111][111];
string act;

bool dfs(int v, int x, int y) {
	// cout << x << ' ' << y << '\n';
	if (a[x][y] == '#' || x < 1 || y < 1 || x > n || y > m) return false;
	if (v >= len(act)) return true;
	if (act[v] == 'N') return dfs(v + 1, x - 1, y);
	if (act[v] == 'E') return dfs(v + 1, x, y + 1);
	if (act[v] == 'S') return dfs(v + 1, x + 1, y);
	if (act[v] == 'W') return dfs(v + 1, x, y - 1);
}

void GazizMadi() {
	int k;
	cin >> n >> m >> k;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> a[i][j];
		}
	}
	cin >> act;
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			// int i = n, j = 1;
			ans += dfs(0, i, j);
			// if (dfs(0, i, j) == 1) cout << i << ' ' << j << '\n';
		}
	}
	cout << ans;
}

const bool Cases = 0;

signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	srand(time(0));
	int TT = 1;
	if (Cases) cin >> TT;
	for (int i = 1; i <= TT; i++) {
		//cout << "Case " << i << ": ";
		GazizMadi();
	}
}

Compilation message (stderr)

nautilus.cpp: In function 'bool dfs(long long int, long long int, long long int)':
nautilus.cpp:56:1: warning: control reaches end of non-void function [-Wreturn-type]
   56 | }
      | ^

• Subtask 1: 29 / 29
• Subtask 2: 0 / 37
• Subtask 3: 0 / 34