Submission #522212

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
522212	2022-02-04T06:54:11 Z	blue	Nautilus (BOI19_nautilus)	C++17	Compilation error	0 ms	0 KB

nautilus

#include <iostream>
#include <bitset>
using namespace std;

const int mx = 10;

int main()
{
	bitset<(mx+2) * (mx+2)> grid, DP0, DP1;

	grid.reset();

	int R, C, M;
	cin >> R >> C >> M;



	for(int i = 1; i <= R; i++)
	{
		for(int j = 1; j <= C; j++)
		{
			char c;
			cin >> c;

			if(c == '.') 
				grid.set((mx+2) * i + j);
		}
	}
	// cerr << "\n";

	// for(int i = 0; i < (mx+2)*(mx+2); i++) 
	// {
	// 	cerr << grid[i] << ' ';
	// 	if(i % (mx+2) == mx+1) cerr << '\n';
	// }



	string S;
	cin >> S;

	reverse(S.begin(), S.end());

	DP0 = grid;

	for(char c : S)
	{
		// cerr << "\n\n\n c = " << c << '\n';

		DP1 = DP0;

		// for(int i = 0; i < (mx+2)*(mx+2); i++) 
		// {
		// 	cerr << DP1[i] << ' ';
		// 	if(i % (mx+2) == mx+1) cerr << '\n';
		// }
		// cerr << "-----\n";

		if(c == 'N') DP1 >>= (mx+2);
		else if(c == 'S') DP1 <<= (mx+2);
		else if(c == 'W') DP1 >>= 1;
		else if(c == 'E') DP1 <<= 1;

		DP1 &= grid;

		// for(int i = 0; i < (mx+2)*(mx+2); i++) 
		// {
		// 	cerr << DP1[i] << ' ';
		// 	if(i % (mx+2) == mx+1) cerr << '\n';
		// }

		swap(DP0, DP1);

		
	}

	cout << DP0.count() << '\n';
}

Compilation message

nautilus.cpp: In function 'int main()':
nautilus.cpp:42:2: error: 'reverse' was not declared in this scope
   42 |  reverse(S.begin(), S.end());
      |  ^~~~~~~