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Submission #824048

# Submission time Handle Problem Language Result Execution time Memory
824048 2023-08-13T12:16:27 Z MohamedAliSaidane Dango Maker (JOI18_dango_maker) C++14
33 / 100
 2000 ms 201920 KB 
    #include<bits/stdc++.h>
    #pragma GCC optimize("O3,unroll-loops")
	#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
    using namespace std;
     
    typedef long long ll;
     
    #define ff first
    #define ss second
    #define pb push_back
    #define all(x) (x).begin(),(x).end()
     
    const int nax = 3005;
    const int MOD = 1e9 + 7;
    int n, m;
    char grid[nax][nax];
    int uses[nax][nax];
    vector<int> p, setsz, seen;
    vector<int> R, T;
    int dp[2][2][2][2];
    unordered_map<int,vector<int>> comp;
    int findset(int x){return p[x] = p[x] == x? x: findset(p[x]);}
    void unite(int i, int j)
    {
    	int x = findset(i);
    	int y = findset(j);
    	if(x == y)
    		return ;
    	if(setsz[x] > setsz[y])
    		swap(x, y);
    	p[x] = y;
    	setsz[y] += setsz[x];
    	return ; 
    }
    bool cmp(int i, int j)
    {
    	if(R[i] == R[j])
    		return T[i] < T[j];
    	else
    		return R[i] < R[j];
    }
    bool collision(int i, int j)
    {
    	if(T[i] == T[j])
    		return false;
    	if(R[i] > R[j])
    		swap(i, j);
    	if(R[i] == R[j])
    		return true;
    	if(R[j] <= R[i] + 2)
    		return (T[i] == 1);
    	return false;
    }
    void solve()
    {
    	memset(uses, -1, sizeof(uses));
    	cin >> n >> m;
    	for(int i = 0; i < n; i++)
    		for(int j = 0; j < m; j++)
    			cin >> grid[i][j];
    	for(int i = 0;  i< n - 2; i++)
    	{
    		for(int j = 0; j < m; j++)
    		{
    			if(grid[i][j] == 'R' && grid[i + 1][j] == 'G' && grid[i + 2][j] == 'W')
    			{
    				int idx = p.size();
    				T.pb(1);
    				R.pb(i);
    				uses[i][j] = uses[i + 1][j] = uses[i + 2][j] =  idx;
    				p.pb(idx);
    				setsz.pb(1);
    			}
    		}
    	}
    	for(int i = 0; i < n; i++)
    	{
    		for(int j = 0; j < m - 2; j++)
    		{
    			if((grid[i][j] == 'R') && (grid[i][j + 1] == 'G') && (grid[i][j + 2] == 'W'))
    			{
    				int idx = p.size();
    				T.pb(0);
    				R.pb(i);
    				p.pb(idx);
    				setsz.pb(1);
    				if(uses[i][j] != -1)
    					unite(idx, uses[i][j]);
    				else
    					uses[i][j] = idx;
    				if(uses[i][j + 1] != -1)
    					unite(idx, uses[i][j + 1]);
    				else
    					uses[i][j + 1] =  idx;
    				if(uses[i][j + 2] != -1)
    					unite(idx, uses[i][j + 2]);
    				else
    					uses[i][j + 2] = idx;    				
    			}	
    		}	
    	}
    	for(int i = 0; i < (int)(p.size()); i++)
    		comp[findset(i)].pb(i);
    	//cout << p.size() << endl; 
    	seen.assign((int)(p.size()), 0);
    	int ans = 0;
    	for(int i =0; i < n; i++)
    	{
    		for(int j =0; j < m; j++)
    		{
    			if(uses[i][j] == -1)
    				continue;

    			int u = findset(uses[i][j]);
    			if(seen[u])
    				continue;
    			if(setsz[u] <= 2)
    			{
    				seen[u] = 1;
    				ans += 1;
    				continue;
    			}
     
    			sort(all(comp[u]), cmp);
    			int sz = setsz[u];
    			//cout << i << ' ' << j << ' ' << sz << endl;
    			for(int x = sz - 1; x >= 0; x--)
    			{
    				for(int b = 0; b <= 1; b++)
    				{
    					for(int bp = 0; bp <= min(x, 1); bp++)
    					{
    						for(int bpp = 0; bpp <= min(max(0,x - 1), 1); bpp++)
    						{
    								int avt = x > 1? comp[u][x - 2]: -1;
    								int prev = x > 0? comp[u][x - 1]: -1;
    								int cur = comp[u][x];
    								int nxt = x< sz - 1? comp[u][x + 1]: -1;
    								int me = (x & 1);
    								int ot = 1 - me;
    								if((b == 1 && bp == 1 && collision(cur, prev)) || (b == 1 && bpp == 1 && collision(cur, avt)))
    								{
    									dp[b][bp][bpp][me] = -MOD;
    									continue;
    								}
    								if(bp == 1 && bpp == 1 && collision(prev, avt))
    								{
    									dp[b][bp][bpp][me] = -MOD;
    									continue;
    								}
    								if(x == sz - 1)
    								{
    									dp[b][bp][bpp][me] = b;
    									continue;
    								}
    								int rep = 0;
    								if(bpp)
    								{
    									if(collision(nxt, avt))
    										rep = dp[0][b][bp][ot];
    									else
    										rep = max(dp[0][b][bp][ot], dp[1][b][bp][ot]);
    								}
    								else
    									rep = max(dp[0][b][bp][ot], dp[1][b][bp][ot]);
    								dp[b][bp][bpp][me] = b + rep;
    							
    						}
    					}
    				}
    			}
    			ans += max(dp[0][0][0][0], dp[1][0][0][0]);
    			seen[u] = 1;
    		}
    	}
    	cout << ans ;
    }
    int32_t main()
    {
    	ios::sync_with_stdio(false);
    	cin.tie(0); cout.tie(0);
    	
    	
    	int tt = 1;
    	while(tt--)
    		solve();
    }

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 35668 KB Output is correct
2 Correct 12 ms 35668 KB Output is correct
3 Correct 12 ms 35560 KB Output is correct
4 Correct 14 ms 35624 KB Output is correct
5 Correct 11 ms 35652 KB Output is correct
6 Correct 11 ms 35668 KB Output is correct
7 Correct 12 ms 35668 KB Output is correct
8 Correct 12 ms 35668 KB Output is correct
9 Correct 12 ms 35588 KB Output is correct
10 Correct 12 ms 35668 KB Output is correct
11 Correct 12 ms 35556 KB Output is correct
12 Correct 12 ms 35568 KB Output is correct
13 Correct 11 ms 35648 KB Output is correct
14 Correct 13 ms 35660 KB Output is correct
15 Correct 11 ms 35668 KB Output is correct
16 Correct 12 ms 35656 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 35668 KB Output is correct
2 Correct 12 ms 35668 KB Output is correct
3 Correct 12 ms 35560 KB Output is correct
4 Correct 14 ms 35624 KB Output is correct
5 Correct 11 ms 35652 KB Output is correct
6 Correct 11 ms 35668 KB Output is correct
7 Correct 12 ms 35668 KB Output is correct
8 Correct 12 ms 35668 KB Output is correct
9 Correct 12 ms 35588 KB Output is correct
10 Correct 12 ms 35668 KB Output is correct
11 Correct 12 ms 35556 KB Output is correct
12 Correct 12 ms 35568 KB Output is correct
13 Correct 11 ms 35648 KB Output is correct
14 Correct 13 ms 35660 KB Output is correct
15 Correct 11 ms 35668 KB Output is correct
16 Correct 12 ms 35656 KB Output is correct
17 Correct 12 ms 35672 KB Output is correct
18 Correct 14 ms 35668 KB Output is correct
19 Correct 12 ms 35668 KB Output is correct
20 Correct 12 ms 35580 KB Output is correct
21 Correct 12 ms 35668 KB Output is correct
22 Correct 12 ms 35668 KB Output is correct
23 Correct 13 ms 35668 KB Output is correct
24 Correct 12 ms 35668 KB Output is correct
25 Correct 12 ms 35684 KB Output is correct
26 Correct 12 ms 35668 KB Output is correct
27 Correct 13 ms 35652 KB Output is correct
28 Correct 13 ms 35580 KB Output is correct
29 Correct 12 ms 35624 KB Output is correct
30 Correct 13 ms 35680 KB Output is correct
31 Correct 12 ms 35668 KB Output is correct
32 Correct 12 ms 35668 KB Output is correct
33 Correct 12 ms 35668 KB Output is correct
34 Correct 12 ms 35648 KB Output is correct
35 Correct 15 ms 35692 KB Output is correct
36 Correct 13 ms 35680 KB Output is correct
37 Correct 15 ms 35648 KB Output is correct
38 Correct 13 ms 35648 KB Output is correct
39 Correct 13 ms 35668 KB Output is correct
40 Correct 13 ms 35600 KB Output is correct
41 Correct 13 ms 35668 KB Output is correct
42 Correct 12 ms 35672 KB Output is correct
43 Correct 12 ms 35668 KB Output is correct
44 Correct 12 ms 35692 KB Output is correct
45 Correct 13 ms 35696 KB Output is correct
46 Correct 16 ms 35644 KB Output is correct
47 Correct 13 ms 35672 KB Output is correct
48 Correct 12 ms 35668 KB Output is correct
49 Correct 12 ms 35600 KB Output is correct
50 Correct 12 ms 35668 KB Output is correct
51 Correct 12 ms 35672 KB Output is correct
52 Correct 12 ms 35668 KB Output is correct
53 Correct 12 ms 35668 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 35668 KB Output is correct
2 Correct 12 ms 35668 KB Output is correct
3 Correct 12 ms 35560 KB Output is correct
4 Correct 14 ms 35624 KB Output is correct
5 Correct 11 ms 35652 KB Output is correct
6 Correct 11 ms 35668 KB Output is correct
7 Correct 12 ms 35668 KB Output is correct
8 Correct 12 ms 35668 KB Output is correct
9 Correct 12 ms 35588 KB Output is correct
10 Correct 12 ms 35668 KB Output is correct
11 Correct 12 ms 35556 KB Output is correct
12 Correct 12 ms 35568 KB Output is correct
13 Correct 11 ms 35648 KB Output is correct
14 Correct 13 ms 35660 KB Output is correct
15 Correct 11 ms 35668 KB Output is correct
16 Correct 12 ms 35656 KB Output is correct
17 Correct 12 ms 35672 KB Output is correct
18 Correct 14 ms 35668 KB Output is correct
19 Correct 12 ms 35668 KB Output is correct
20 Correct 12 ms 35580 KB Output is correct
21 Correct 12 ms 35668 KB Output is correct
22 Correct 12 ms 35668 KB Output is correct
23 Correct 13 ms 35668 KB Output is correct
24 Correct 12 ms 35668 KB Output is correct
25 Correct 12 ms 35684 KB Output is correct
26 Correct 12 ms 35668 KB Output is correct
27 Correct 13 ms 35652 KB Output is correct
28 Correct 13 ms 35580 KB Output is correct
29 Correct 12 ms 35624 KB Output is correct
30 Correct 13 ms 35680 KB Output is correct
31 Correct 12 ms 35668 KB Output is correct
32 Correct 12 ms 35668 KB Output is correct
33 Correct 12 ms 35668 KB Output is correct
34 Correct 12 ms 35648 KB Output is correct
35 Correct 15 ms 35692 KB Output is correct
36 Correct 13 ms 35680 KB Output is correct
37 Correct 15 ms 35648 KB Output is correct
38 Correct 13 ms 35648 KB Output is correct
39 Correct 13 ms 35668 KB Output is correct
40 Correct 13 ms 35600 KB Output is correct
41 Correct 13 ms 35668 KB Output is correct
42 Correct 12 ms 35672 KB Output is correct
43 Correct 12 ms 35668 KB Output is correct
44 Correct 12 ms 35692 KB Output is correct
45 Correct 13 ms 35696 KB Output is correct
46 Correct 16 ms 35644 KB Output is correct
47 Correct 13 ms 35672 KB Output is correct
48 Correct 12 ms 35668 KB Output is correct
49 Correct 12 ms 35600 KB Output is correct
50 Correct 12 ms 35668 KB Output is correct
51 Correct 12 ms 35672 KB Output is correct
52 Correct 12 ms 35668 KB Output is correct
53 Correct 12 ms 35668 KB Output is correct
54 Correct 12 ms 35668 KB Output is correct
55 Correct 15 ms 44504 KB Output is correct
56 Correct 13 ms 35940 KB Output is correct
57 Correct 15 ms 41888 KB Output is correct
58 Correct 50 ms 46996 KB Output is correct
59 Correct 360 ms 116136 KB Output is correct
60 Correct 356 ms 116140 KB Output is correct
61 Correct 358 ms 116040 KB Output is correct
62 Correct 12 ms 35668 KB Output is correct
63 Correct 346 ms 114008 KB Output is correct
64 Execution timed out 2068 ms 201920 KB Time limit exceeded
65 Halted 0 ms 0 KB -