oj.uz

Submission #222565

# Submission time Handle Problem Language Result Execution time Memory
222565 2020-04-13T11:02:00 Z compilers None (KOI17_civilization) C++14
100 / 100
 825 ms 29224 KB 
#include	<iostream>
#include	<queue>
 
using namespace	std;
 
#define	MAX_SIZE			(2000+1)
#define	MAX_CIVILIZATION	(100000+1)
#define	NONE				0
 
#define	UP		0
#define	DOWN	1
#define	LEFT	2
#define	RIGHT	3
#define	MAX_DIR	4
 
const struct{
	int	d_row,d_col;
} adj[MAX_DIR] = {{-1,0},{1,0},{0,-1},{0,1}};
 
#define	IN_RANGE(MIN,n,MAX)	((MIN)<=(n)&&(n)<=(MAX))
 
typedef	pair<int,int>	Pos;	// first:row, second:col
 
int	N,K,grid[MAX_SIZE][MAX_SIZE];
int	parent[MAX_CIVILIZATION];
 
int		find_parent_civilization(int c)
{
	int&	ret = parent[c];
	
	if( ret != c )
	{
		ret = find_parent_civilization(ret);
	}
	
	return	ret;
}

bool	get_adj_pos(const int& current_row,const int& current_col,
					int& adj_row,int& adj_col,const int& direction)
{
	adj_row = current_row+adj[direction].d_row;
	adj_col = current_col+adj[direction].d_col;
	
	if( !IN_RANGE(1,adj_row,N) || !IN_RANGE(1,adj_col,N) )
	{
		return	false;
	}
	
	return	true;
}
 
int		simulate(queue<Pos>& pos_q)
{
	int	t;
	
	for(t=0;K!=1;t++)
	{
		queue<Pos>	spread;
		
		for(int i=1,size=pos_q.size();i<=size;i++)
		{
			int	current_row,current_col;
			
			current_row = pos_q.front().first;
			current_col = pos_q.front().second;
						
			pos_q.pop();
			
			for(int d=UP;d<=RIGHT;d++)
			{
				int	adj_row,adj_col;
				int	current_civilization,adj_civilization;
				 
				if( get_adj_pos(current_row,current_col,adj_row,adj_col,d) == false )
				{
					continue;
				}
				
				current_civilization = find_parent_civilization(grid[current_row][current_col]);
				
				if( grid[adj_row][adj_col] == NONE )
				{
					grid[adj_row][adj_col] = current_civilization;
					spread.push(make_pair(adj_row,adj_col));
					pos_q.push(make_pair(adj_row,adj_col));
				}
			}
		}
		
		for(;!spread.empty();)
		{
			int	current_row,current_col;
			
			current_row = spread.front().first;
			current_col = spread.front().second;
			
			spread.pop();
			
			for(int d=UP;d<=RIGHT;d++)
			{
				int	adj_row,adj_col;
				int	current_civilization,adj_civilization;
				
				if( get_adj_pos(current_row,current_col,adj_row,adj_col,d) == false )
				{
					continue;
				}
				
				current_civilization = find_parent_civilization(grid[current_row][current_col]);
				adj_civilization = find_parent_civilization(grid[adj_row][adj_col]);
				
				if( adj_civilization==NONE || current_civilization==adj_civilization )
				{
					continue;
				}
				
				int	big,small;
				
				big = max(current_civilization,adj_civilization);
				small = min(current_civilization,adj_civilization);
				
				parent[big] = small;
				K--;
			}
		}
		/*
		cout<<"time="<<t+1<<",K="<<K<<'\n';
		
		for(int row=1;row<=N;row++)
		{
			for(int col=1;col<=N;col++)
			{
				cout<<find_parent(grid[row][col])<<' ';
			}
			cout<<'\n';
		}
		getchar();
		*/
	}
	
	return	t;	
}
 
void	input(queue<Pos>& pos_q)
{
	cin>>N>>K;
	
	for(int i=1;i<=K;i++)
	{
		int	row,col;
 
		cin>>col>>row;
		pos_q.push(make_pair(row,col));
		grid[row][col] = parent[i] = i;
	}
	
	for(int i=1,size=pos_q.size();i<=size;i++)
	{
		int	current_row,current_col;
		
		current_row = pos_q.front().first;
		current_col = pos_q.front().second;
		
		pos_q.pop();
		pos_q.push(make_pair(current_row,current_col));
		
		for(int d=UP;d<=RIGHT;d++)
		{
			int	adj_row,adj_col;
			int	current_civilization,adj_civilization;
			
			if( get_adj_pos(current_row,current_col,adj_row,adj_col,d) == false )
			{
				continue;
			}
			
			current_civilization = find_parent_civilization(grid[current_row][current_col]);
			adj_civilization = find_parent_civilization(grid[adj_row][adj_col]);
			
			if( adj_civilization==NONE || current_civilization==adj_civilization )
			{
				continue;
			}
			
			int	big,small;
			
			big = max(current_civilization,adj_civilization);
			small = min(current_civilization,adj_civilization);
			
			parent[big] = small;
			K--;
		}
	}
}
 
int		main(void)
{
	cin.tie(NULL);
	cin.sync_with_stdio(false);
	
	queue<Pos>	pos_q;
	
	input(pos_q);
	cout<<simulate(pos_q)<<'\n';
	
	return	0;
}

Compilation message

civilization.cpp: In function 'int simulate(std::queue<std::pair<int, int> >&)':
civilization.cpp:73:30: warning: unused variable 'adj_civilization' [-Wunused-variable]
     int current_civilization,adj_civilization;
                              ^~~~~~~~~~~~~~~~

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 5 ms 768 KB Output is correct
3 Correct 5 ms 768 KB Output is correct
4 Correct 5 ms 768 KB Output is correct
5 Correct 5 ms 768 KB Output is correct
6 Correct 7 ms 768 KB Output is correct
7 Correct 6 ms 768 KB Output is correct
8 Correct 5 ms 768 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 5 ms 768 KB Output is correct
11 Correct 5 ms 768 KB Output is correct
12 Correct 5 ms 768 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 5 ms 768 KB Output is correct
3 Correct 5 ms 768 KB Output is correct
4 Correct 5 ms 768 KB Output is correct
5 Correct 5 ms 768 KB Output is correct
6 Correct 7 ms 768 KB Output is correct
7 Correct 6 ms 768 KB Output is correct
8 Correct 5 ms 768 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 5 ms 768 KB Output is correct
11 Correct 5 ms 768 KB Output is correct
12 Correct 53 ms 8184 KB Output is correct
13 Correct 45 ms 7288 KB Output is correct
14 Correct 54 ms 7908 KB Output is correct
15 Correct 39 ms 6776 KB Output is correct
16 Correct 12 ms 3200 KB Output is correct
17 Correct 161 ms 14204 KB Output is correct
18 Correct 175 ms 14200 KB Output is correct
19 Correct 172 ms 14200 KB Output is correct
20 Correct 168 ms 14204 KB Output is correct
21 Correct 173 ms 14328 KB Output is correct
22 Correct 7 ms 4352 KB Output is correct
23 Correct 58 ms 8312 KB Output is correct
24 Correct 5 ms 768 KB Output is correct

Subtask #3
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 5 ms 768 KB Output is correct
3 Correct 5 ms 768 KB Output is correct
4 Correct 5 ms 768 KB Output is correct
5 Correct 5 ms 768 KB Output is correct
6 Correct 7 ms 768 KB Output is correct
7 Correct 6 ms 768 KB Output is correct
8 Correct 5 ms 768 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 5 ms 768 KB Output is correct
11 Correct 5 ms 768 KB Output is correct
12 Correct 53 ms 8184 KB Output is correct
13 Correct 45 ms 7288 KB Output is correct
14 Correct 54 ms 7908 KB Output is correct
15 Correct 39 ms 6776 KB Output is correct
16 Correct 12 ms 3200 KB Output is correct
17 Correct 161 ms 14204 KB Output is correct
18 Correct 175 ms 14200 KB Output is correct
19 Correct 172 ms 14200 KB Output is correct
20 Correct 168 ms 14204 KB Output is correct
21 Correct 173 ms 14328 KB Output is correct
22 Correct 7 ms 4352 KB Output is correct
23 Correct 58 ms 8312 KB Output is correct
24 Correct 172 ms 13944 KB Output is correct
25 Correct 227 ms 15992 KB Output is correct
26 Correct 153 ms 15224 KB Output is correct
27 Correct 172 ms 14200 KB Output is correct
28 Correct 122 ms 13944 KB Output is correct
29 Correct 778 ms 25140 KB Output is correct
30 Correct 669 ms 20340 KB Output is correct
31 Correct 813 ms 29224 KB Output is correct
32 Correct 809 ms 29096 KB Output is correct
33 Correct 825 ms 29092 KB Output is correct
34 Correct 179 ms 16120 KB Output is correct
35 Correct 7 ms 4352 KB Output is correct
36 Correct 5 ms 768 KB Output is correct