oj.uz

Submission #1046431

# Submission time Handle Problem Language Result Execution time Memory
1046431 2024-08-06T14:26:56 Z lozergam Maze (JOI23_ho_t3) C++17
35 / 100
 2000 ms 242056 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll int
#define pb push_back
#define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
#define debug(x) cout << #x << " : " << x << endl << flush
#define endl '\n'
#define sz(x) (ll)x.size()
#define arr(x) array<ll, x>
#define insert emplace

const ll INF = 1e9;
vector<vector<bool>> a, vis;
arr(2) s, e;
ll n, m, k;
ll ans;
vector<arr(2)> v, g;
vector<set<ll>> row, col;
ll cnt;

inline void bfs()
{
    // debug(cnt);
	while(!v.empty())
	{
		auto x = v.back();
        // debug(x[0]);
        // debug(x[1]);
		v.pop_back();
		
		if(x[0] != 1 and !vis[x[0] - 1][x[1]])
		{
			if(a[x[0] - 1][x[1]])
				g.pb({x[0] - 1, x[1]});
			else
            {
                vis[x[0] - 1][x[1]] = 1;
				v.pb({x[0] - 1, x[1]});
            }
		}
		
		if(x[0] != n and !vis[x[0] + 1][x[1]])
		{
			if(a[x[0] + 1][x[1]])
				g.pb({x[0] + 1, x[1]});
			else
            {
				v.pb({x[0] + 1, x[1]});
                vis[x[0] + 1][x[1]] = 1;
            }
		}
		
		if(x[1] != 1 and !vis[x[0]][x[1] - 1])
		{
			if(a[x[0]][x[1] - 1])
				g.pb({x[0], x[1] - 1});
			else
            {
				v.pb({x[0], x[1] - 1});
                vis[x[0]][x[1] - 1] = 1;
            }
		}
		
		if(x[1] != m and !vis[x[0]][x[1] + 1])
		{
			if(a[x[0]][x[1] + 1])
				g.pb({x[0], x[1] + 1});
			else
            {
				v.pb({x[0], x[1] + 1});
                vis[x[0]][x[1] + 1] = 1;
            }
		}
	}
}

int main()
{
	ios_base::sync_with_stdio(0);cin.tie(0);
	
	cin >> n >> m >> k;
	
	a.resize(n + 1);
	vis.resize(n + 1);
	row.resize(n + 1);
	col.resize(m + 1);
	
	For(i, n + 1)
	{
		a[i].resize(m + 1, 0);
		
		vis[i].resize(m + 1, 0);
		
		For(j, m + 1)
			vis[i][j] = 0;
	}
	
	cin >> s[0] >> s[1];
	cin >> e[0] >> e[1];
	
	for(int i = 1;i <= n; i++)
		for(int j = 1;j <= m; j++)
		{
			char c;
			cin >> c;
			
			if(c == '.')
				a[i][j] = 0;
			else 
				a[i][j] = 1;
				
			row[i].insert(j);
			col[j].insert(i);
		}
        
	For(i, n + 1)
		row[i].insert(INF);
	For(i, m + 1)
		col[i].insert(INF);
	
	v.pb(s);
	vis[s[0]][s[1]] = 1;

// 2 4 2
// 1 1
// 2 4
// .###
// ###.

	while(1)
	{
		bfs();
		
		if(vis[e[0]][e[1]])
			break;
		
		for(auto x : g)
		{
			arr(2) r, c;
			
			r[0] = max(x[0] - k + 1, 1);
			r[1] = min(x[0] + k - 1, n);
			c[0] = max(x[1] - k + 1, 1);
			c[1] = min(x[1] + k - 1, m);
			
			if(e[0] >= r[0] and e[0] <= r[1] and e[1] >= c[0] and e[1] <= c[1])
			{
				cout << ans + 1 << endl;
				return 0;
			}
			// debug(x[0]);
			// debug(x[1]);
			// debug(r[0]);
			// debug(r[1]);
			// debug(c[0]);
			// debug(c[1]);
			// debug(endl);

			auto it = row[r[0]].lower_bound(c[0]);
			
			while((*it) <= c[1])
			{
				if(!vis[r[0]][(*it)])
				{
					vis[r[0]][(*it)] = 1;
					v.pb({r[0], (*it)});
				}
				
				row[r[0]].erase(it);
				it = row[r[0]].lower_bound(c[0]);
			}
			
			it = row[r[1]].lower_bound(c[0]);
			
			while((*it) <= c[1])
			{
				if(!vis[r[1]][(*it)])
				{
					vis[r[1]][(*it)] = 1;
					v.pb({r[1], (*it)});
				}
				
				row[r[1]].erase(it);
				it = row[r[1]].lower_bound(c[0]);
			}
			
			it = col[c[0]].lower_bound(r[0]);
			
			while((*it) <= r[1])
			{
				if(!vis[(*it)][c[0]])
				{
					vis[(*it)][c[0]] = 1;
					v.pb({(*it), c[0]});
				}
				
				col[c[0]].erase(it);
				it = col[c[0]].lower_bound(r[0]);
			}
			
			it = col[c[1]].lower_bound(r[0]);
			
			while((*it) <= r[1])
			{
				if(!vis[(*it)][c[1]])
				{
					vis[(*it)][c[1]] = 1;
					v.pb({(*it), c[1]});
				}
				
				col[c[1]].erase(it);
				it = col[c[1]].lower_bound(r[0]);
			}
			
			v.pb(x);
			vis[x[0]][x[1]] = 1;
			
		}
		
		g.clear();
		
		ans++;
	}
	
	cout << ans << endl;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:7:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
      |                           ^
Main.cpp:90:2: note: in expansion of macro 'For'
   90 |  For(i, n + 1)
      |  ^~~
Main.cpp:7:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    7 | #define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
      |                           ^
Main.cpp:96:3: note: in expansion of macro 'For'
   96 |   For(j, m + 1)
      |   ^~~
Main.cpp:7:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
      |                           ^
Main.cpp:118:2: note: in expansion of macro 'For'
  118 |  For(i, n + 1)
      |  ^~~
Main.cpp:7:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
      |                           ^
Main.cpp:120:2: note: in expansion of macro 'For'
  120 |  For(i, m + 1)
      |  ^~~

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 732 ms 201808 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 18 ms 8032 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 664 KB Output is correct
19 Execution timed out 2101 ms 242056 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 736 ms 201872 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 16 ms 7392 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 604 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 604 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 468 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 604 KB Output is correct
25 Correct 8 ms 3932 KB Output is correct
26 Correct 9 ms 5996 KB Output is correct
27 Correct 10 ms 6468 KB Output is correct
28 Correct 11 ms 6444 KB Output is correct
29 Correct 9 ms 6060 KB Output is correct
30 Correct 9 ms 5976 KB Output is correct
31 Correct 10 ms 6236 KB Output is correct
32 Correct 10 ms 6228 KB Output is correct
33 Correct 11 ms 6232 KB Output is correct
34 Correct 21 ms 13188 KB Output is correct
35 Correct 27 ms 15252 KB Output is correct
36 Correct 34 ms 15308 KB Output is correct
37 Correct 25 ms 14424 KB Output is correct
38 Correct 24 ms 14424 KB Output is correct
39 Correct 111 ms 48140 KB Output is correct
40 Correct 351 ms 133312 KB Output is correct
41 Correct 398 ms 147432 KB Output is correct
42 Correct 405 ms 147664 KB Output is correct
43 Correct 395 ms 141908 KB Output is correct
44 Correct 368 ms 141904 KB Output is correct
45 Correct 452 ms 162048 KB Output is correct
46 Correct 442 ms 160424 KB Output is correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 736 ms 201872 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 16 ms 7392 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 604 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Execution timed out 2094 ms 241980 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 736 ms 201872 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 16 ms 7392 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 604 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Execution timed out 2094 ms 241980 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 732 ms 201808 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 18 ms 8032 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 664 KB Output is correct
19 Execution timed out 2101 ms 242056 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #7
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 732 ms 201808 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 18 ms 8032 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 664 KB Output is correct
19 Execution timed out 2101 ms 242056 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #8
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 732 ms 201808 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 18 ms 8032 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 664 KB Output is correct
19 Execution timed out 2101 ms 242056 KB Time limit exceeded
20 Halted 0 ms 0 KB -