Submission #58740

#	Time	Username	Problem	Language	Result	Execution time	Memory
58740		YaDon4ick	Dango Maker (JOI18_dango_maker)	C++14	13 / 100	4 ms	760 KiB

dango_maker

//By Don4ick
#define _GLIBCXX_DEBUG

#include <bits/stdc++.h>

typedef long long ll;
typedef long double ld;
typedef unsigned int ui;

#define forn(i, n) for (int i = 1; i <= n; i++)
#define pb push_back
#define all(x) x.begin(), x.end()
#define y1 qwer1234

const double PI = acos(-1.0);
const int DIR = 4;
const int X[] = {1, 0, -1, 0};
const int Y[] = {0, 1, 0, -1};

const int N = 3005;
const int M = N * N * 2;

using namespace std;

bitset < M > was;
int n, m, cnt0, cnt1;
string s[N];

void dfs(int x, int y, int type)
{
	int v = x * m + y + type * n * m;
	was[v] = true;
	if (type == 0)
	{
		cnt0++;
		if (x < n - 2 && s[x + 1][y] == 'G' && s[x + 2][y] == 'W')
		{
			int u = x * m + y + n * m;
			if (!was[u])
				dfs(x, y, 1);
		}
		if (x < n - 1 && x > 0 && s[x - 1][y + 1] == 'R' && s[x + 1][y + 1] == 'W')
		{                     	
			int tx = x - 1, ty = y + 1;
			int u = tx * m + ty + n * m;
			if (!was[u])
				dfs(tx, ty, 1);
		}
		if (x > 1 && s[x - 2][y + 2] == 'R' && s[x - 1][y + 2] == 'G')
		{
			int tx = x - 2, ty = y + 2;
			int u = tx * m + ty + n * m;
			if (!was[u])
				dfs(tx, ty, 1);
		}
	}	
	else
	{
		cnt1++;
		if (y < n - 2 && s[x][y + 1] == 'G' && s[x][y + 2] == 'W')
		{
			int tx = x, ty = y;
			int u = tx * m + ty;
			if (!was[u])
				dfs(tx, ty, 0);
		}
		if (y < n - 1 && y > 0 && s[x + 1][y - 1] == 'R' && s[x + 1][y + 1] == 'W')
		{
			int tx = x + 1, ty = y - 1;
			int u = tx * m + ty;
			if (!was[u])
				dfs(tx, ty, 0);
		}
		if (y > 1 && s[x + 2][y - 2] == 'R' && s[x + 2][y - 1] == 'G')
		{
			int tx = x + 2, ty = y - 2;
			int u = tx * m + ty;
			if (!was[u])
				dfs(tx, ty, 0);
		}
	}
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);

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

	//~read
	cin >> n >> m;
	for (int i = 0; i < n; i++)
		cin >> s[i];
	//~solve
	int ans = 0; 
	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < m - 2; j++)
		{
			int v = i * m + j;
			if (s[i][j] == 'R' && s[i][j + 1] == 'G' && s[i][j + 2] == 'W' && !was[v])
			{
				cnt0 = cnt1 = 0;
				dfs(i, j, 0);
				ans += max(cnt0, cnt1);
			}
		}
	}
	for (int i = 0; i < n - 2; i++)
	{
		for (int j = 0; j < m; j++)
		{
			int v = i * m + j + n * m;
			if (s[i][j] == 'R' && s[i + 1][j] == 'G' && s[i + 2][j] == 'W' && !was[v])
			{
				cnt0 = cnt1 = 0;
				dfs(i, j, 1);
				ans += max(cnt0, cnt1);
			}
		}
	}
	//~result
	cout << ans << endl;

	return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 20
• Subtask 3: 0 / 67