Submission #730650

#	Time	Username	Problem	Language	Result	Execution time	Memory
730650		gagik_2007	Nautilus (BOI19_nautilus)	C++17	66 / 100	1065 ms	1236 KiB

nautilus

#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <cmath>
#include <chrono>
#include <ctime>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <deque>
#include <limits>
#include <iomanip>
#include <unordered_set>
#include <unordered_map>
#include <fstream>
#include <functional>
#include <random>
#include <cassert>
using namespace std;

typedef long long ll;
typedef long double ld;

#pragma GCC optimize("Ofast")

#define ff first
#define ss second

ll ttt;
const ll INF = 1e18;
const ll MOD = 1e9 + 7;
const ll N = 507;
const ll LG = 21;
ll n, m, k;
char a[N][N];
string s;
bool dp[N][N];
bool lst[N][N];

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin >> n >> m >> k;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> a[i][j];
			if (a[i][j] == '.') {
				dp[i][j] = true;
			}
		}
	}
	for (int i = 0; i <= n + 1; i++) {
		a[i][0] = a[i][m + 1] = '#';
	}
	for (int j = 0; j <= m + 1; j++) {
		a[0][j] = a[n + 1][j] = '#';
	}
	cin >> s;
	for (int c = 0; c < s.size(); c++) {
		for (int i = 1; i <= n; i++) {
			for (int j = 1; j <= m; j++) {
				lst[i][j] = dp[i][j];
				dp[i][j] = false;
			}
		}
		for (int i = 1; i <= n; i++) {
			for (int j = 1; j <= m; j++) {
				if (lst[i][j]) {
					if (s[c] == 'N' || s[c] == '?') {
						if (a[i - 1][j] == '.') {
							dp[i - 1][j] = true;
						}
					}
					if (s[c] == 'E' || s[c] == '?') {
						if (a[i][j + 1] == '.') {
							dp[i][j + 1] = true;
						}
					}
					if (s[c] == 'S' || s[c] == '?') {
						if (a[i + 1][j] == '.') {
							dp[i + 1][j] = true;
						}
					}
					if (s[c] == 'W' || s[c] == '?') {
						if (a[i][j - 1] == '.') {
							dp[i][j - 1] = true;
						}
					}
				}
			}
		}
	}
	int cnt = 0;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cnt += dp[i][j];
		}
	}
	cout << cnt << endl;
}

/// ---- - --------  ------ -------- -- - - -
/// Just a reminder. Ubuntu password is I O I
/// ---- - --------  ------ -------- -- - - -

Compilation message (stderr)

nautilus.cpp: In function 'int main()':
nautilus.cpp:62:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |  for (int c = 0; c < s.size(); c++) {
      |                  ~~^~~~~~~~~~

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