Submission #1055585

#	Time	Username	Problem	Language	Result	Execution time	Memory
1055585		_rain_	Maze (JOI23_ho_t3)	C++14	62 / 100	72 ms	28572 KiB

Main

#include<bits/stdc++.h>
using i64 = long long;
using namespace std;
#define all(datastructure) datastructure.begin(),datastructure.end()
#define find(_vector , _data) upper_bound(_vector.begin(),_vector.end(),_data) - _vector.begin()

int numrow , numcol , k;
int sourcex , sourcey;
int sinkx , sinky;

struct _D
{
	int x , y;
	int stepx , stepy;
};
queue<_D> freezone , banzone;
const int dx[] = {0 , 0 , 1 , -1};
const int dy[] = {1 , -1 , 0 , 0};
bool Zone(int x , int y)
{
	return x > 0 && x <= numrow && y > 0 && y <= numcol;
}


int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	cin >> numrow >> numcol >> k;
	cin >> sourcex >> sourcey;
	cin >> sinkx >> sinky;
	vector<vector<char>> a(numrow+2,vector<char>(numcol+2));
	vector<vector<int>> d(numrow+2,vector<int>(numcol+2,-1));
	for (int i = 1; i <= numrow; ++i)
		{
			string s; cin >> s; s = '3' + s;
			for (int j = 1; j <= numcol; ++j) a[i][j] = s[j];
		}
		if (a[sourcex][sourcey] == '.') 
		{
			d[sourcex][sourcey] = 0;
			freezone.push({sourcex,sourcey,0,0});
		}
		else 
		{
			d[sourcex][sourcey] = 1;
			banzone.push({sourcex,sourcey,k-1,k-1});
		}
	while (freezone.size() || banzone.size())
	{
		while (banzone.size())
		{
			_D node = banzone.front(); banzone.pop();
			if (node.stepx == 0 || node.stepy == 0) freezone.push({node.x,node.y,0,0});			
			for (int i = 0; i < 4; ++i)
			{
				int u = node.x + dx[i];
				int v = node.y + dy[i];
				int remx = node.stepx - abs(dx[i]);
				int remy = node.stepy - abs(dy[i]);

				if ((remx>=0&&remy>=0) && Zone(u,v) && d[u][v] == -1)
				{
					d[u][v] = d[node.x][node.y];
					banzone.push({u , v , remx , remy});
				}
			}
		}
		
		while (freezone.size())
		{
			_D node = freezone.front(); freezone.pop();
			
			for (int i = 0; i < 4; ++i)
			{
				int u = node.x + dx[i];
				int v = node.y + dy[i];
				if (Zone(u,v) && d[u][v] == -1)
				{
					if (a[u][v] == '#') 
					{
						banzone.push({u , v , k - 1 , k - 1});
						d[u][v] = d[node.x][node.y] + 1;
					}
					else 
					{
						freezone.push({u , v , 0 , 0});
						d[u][v] = d[node.x][node.y];
					}
				}
			}
		}
	}
	
	cout << d[sinkx][sinky];
	return 0;

}

• Subtask 1: 8 / 8
• Subtask 2: 19 / 19
• Subtask 3: 16 / 16
• Subtask 4: 19 / 19
• Subtask 5: 0 / 5
• Subtask 6: 0 / 19
• Subtask 7: 0 / 8
• Subtask 8: 0 / 6