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Submission #138095

# Submission time Handle Problem Language Result Execution time Memory
138095 2019-07-29T10:26:38 Z Mahmoud_Adel Mergers (JOI19_mergers) C++14
70 / 100
 2243 ms 125028 KB 
#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
typedef long long ll;
const int N = 5e5+5;
int n, m, ans, cur, s[N], dep[N], sp[N][20], sub[N], ret[N], mark[N], acc[N], cnt[N];
vector<int> adj[N], vec[N];
void pre(int u, int p)
{
	sub[u] = 1;
	dep[u] = dep[p]+1;
	sp[u][0] = p;
	for(int i=1; i<20; i++) sp[u][i] = sp[sp[u][i-1]][i-1];
	for(int v : adj[u]) if(v != p) pre(v, u), sub[u] += sub[v];	
}	
int equate(int u, int v)
{
	int c = dep[u]-dep[v];
	for(int i=0; i<20; i++) if(c & (1<<i)) u = sp[u][i];
	return u;
}
int LCA(int u, int v)
{
	if(dep[u] < dep[v]) swap(u, v);
	u = equate(u, v);
	if(u == v) return u;
	for(int i=19; i>=0; i--) if(sp[u][i] != sp[v][i]) u = sp[u][i], v = sp[v][i];
	return sp[u][0];
}
void calc(int u, int p)
{
	for(auto v : adj[u]) if(v != p) calc(v, u), ret[u] += ret[v];
	if(ret[u] == sub[u]) mark[u] = 1;
}
void DFS(int u, int p)
{
	for(auto v : adj[u]) if(v != p) DFS(v, u), acc[u] += acc[v];
	if(mark[u] && !acc[u]) cnt[u]=1;
	acc[u] += mark[u];
}
int main()
{
	scanf("%d %d", &n, &m);
	memset(sp, -1, sizeof sp);
	for(int i=1, a, b; i<n; i++) scanf("%d %d", &a, &b),
	adj[a].push_back(b), adj[b].push_back(a);
	for(int i=1; i<=n; i++) scanf("%d", &s[i]), vec[s[i]].push_back(i);
	pre(1, 0);
	for(int i=1; i<=m; i++) 
	{
		if(vec[i].empty()) continue;
		int node = vec[i][0];
		for(auto u : vec[i]) node = LCA(node, u);
		ret[node] += vec[i].size();
	}
	if(n == 1 || m == 1) return cout << 0 << endl, 0;
	calc(1, 0);
	mark[1] = 0;
	DFS(1, 0);
	if(m > 1)
	{
		memset(sp, -1, sizeof sp);
		memset(mark, 0, sizeof mark);
		memset(dep, 0, sizeof dep);
		memset(ret, 0, sizeof ret);
		memset(sub, 0, sizeof sub);
		memset(acc, 0, sizeof acc);
		int nd;
		if(s[1] == 1) nd = vec[2][0];
		else nd = vec[1][0];
		pre(nd, 0);
		for(int i=1; i<=m; i++) 
		{
			if(vec[i].empty()) continue;
			int node = vec[i][0];
			for(auto u : vec[i]) node = LCA(node, u);
			ret[node] += vec[i].size();
		}
		calc(nd, 0);
		mark[nd] = 0;
		DFS(nd, 0);
	}
	for(int i=1; i<=n; i++) ans += cnt[i];
	cout << (ans+1)/2 << endl;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:44:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:47:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1, a, b; i<n; i++) scanf("%d %d", &a, &b),
                               ~~~~~~~~~~~~~~~~~~~~~~~~
  adj[a].push_back(b), adj[b].push_back(a);
  ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
mergers.cpp:48:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=n; i++) scanf("%d", &s[i]), vec[s[i]].push_back(i);
                          ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 72696 KB Output is correct
2 Correct 74 ms 72696 KB Output is correct
3 Correct 73 ms 72724 KB Output is correct
4 Correct 72 ms 72696 KB Output is correct
5 Correct 72 ms 72760 KB Output is correct
6 Correct 57 ms 62968 KB Output is correct
7 Correct 57 ms 62968 KB Output is correct
8 Correct 73 ms 72824 KB Output is correct
9 Correct 72 ms 72760 KB Output is correct
10 Correct 72 ms 72696 KB Output is correct
11 Correct 72 ms 72824 KB Output is correct
12 Correct 72 ms 72696 KB Output is correct
13 Correct 73 ms 72668 KB Output is correct
14 Correct 73 ms 72696 KB Output is correct
15 Correct 73 ms 72696 KB Output is correct
16 Correct 74 ms 72772 KB Output is correct
17 Correct 75 ms 72696 KB Output is correct
18 Correct 74 ms 72696 KB Output is correct
19 Correct 74 ms 72696 KB Output is correct
20 Correct 75 ms 72668 KB Output is correct
21 Correct 73 ms 72824 KB Output is correct
22 Correct 72 ms 72696 KB Output is correct
23 Correct 73 ms 72696 KB Output is correct
24 Correct 73 ms 72824 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 72696 KB Output is correct
2 Correct 74 ms 72696 KB Output is correct
3 Correct 73 ms 72724 KB Output is correct
4 Correct 72 ms 72696 KB Output is correct
5 Correct 72 ms 72760 KB Output is correct
6 Correct 57 ms 62968 KB Output is correct
7 Correct 57 ms 62968 KB Output is correct
8 Correct 73 ms 72824 KB Output is correct
9 Correct 72 ms 72760 KB Output is correct
10 Correct 72 ms 72696 KB Output is correct
11 Correct 72 ms 72824 KB Output is correct
12 Correct 72 ms 72696 KB Output is correct
13 Correct 73 ms 72668 KB Output is correct
14 Correct 73 ms 72696 KB Output is correct
15 Correct 73 ms 72696 KB Output is correct
16 Correct 74 ms 72772 KB Output is correct
17 Correct 75 ms 72696 KB Output is correct
18 Correct 74 ms 72696 KB Output is correct
19 Correct 74 ms 72696 KB Output is correct
20 Correct 75 ms 72668 KB Output is correct
21 Correct 73 ms 72824 KB Output is correct
22 Correct 72 ms 72696 KB Output is correct
23 Correct 73 ms 72696 KB Output is correct
24 Correct 73 ms 72824 KB Output is correct
25 Correct 72 ms 72696 KB Output is correct
26 Correct 76 ms 72952 KB Output is correct
27 Correct 75 ms 72920 KB Output is correct
28 Correct 76 ms 73052 KB Output is correct
29 Correct 76 ms 72924 KB Output is correct
30 Correct 75 ms 72824 KB Output is correct
31 Correct 72 ms 72832 KB Output is correct
32 Correct 76 ms 73080 KB Output is correct
33 Correct 72 ms 72680 KB Output is correct
34 Correct 74 ms 72952 KB Output is correct
35 Correct 76 ms 72952 KB Output is correct
36 Correct 75 ms 72952 KB Output is correct
37 Correct 75 ms 72952 KB Output is correct
38 Correct 73 ms 72952 KB Output is correct
39 Correct 76 ms 72952 KB Output is correct
40 Correct 58 ms 63096 KB Output is correct
41 Correct 75 ms 72940 KB Output is correct
42 Correct 74 ms 72952 KB Output is correct
43 Correct 59 ms 63352 KB Output is correct
44 Correct 72 ms 72696 KB Output is correct
45 Correct 77 ms 73144 KB Output is correct
46 Correct 93 ms 72952 KB Output is correct
47 Correct 72 ms 72796 KB Output is correct
48 Correct 76 ms 72924 KB Output is correct
49 Correct 74 ms 72924 KB Output is correct
50 Correct 75 ms 73080 KB Output is correct
51 Correct 75 ms 72824 KB Output is correct
52 Correct 74 ms 72824 KB Output is correct
53 Correct 77 ms 72952 KB Output is correct
54 Correct 75 ms 72952 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 72696 KB Output is correct
2 Correct 74 ms 72696 KB Output is correct
3 Correct 73 ms 72724 KB Output is correct
4 Correct 72 ms 72696 KB Output is correct
5 Correct 72 ms 72760 KB Output is correct
6 Correct 57 ms 62968 KB Output is correct
7 Correct 57 ms 62968 KB Output is correct
8 Correct 73 ms 72824 KB Output is correct
9 Correct 72 ms 72760 KB Output is correct
10 Correct 72 ms 72696 KB Output is correct
11 Correct 72 ms 72824 KB Output is correct
12 Correct 72 ms 72696 KB Output is correct
13 Correct 73 ms 72668 KB Output is correct
14 Correct 73 ms 72696 KB Output is correct
15 Correct 73 ms 72696 KB Output is correct
16 Correct 74 ms 72772 KB Output is correct
17 Correct 75 ms 72696 KB Output is correct
18 Correct 74 ms 72696 KB Output is correct
19 Correct 74 ms 72696 KB Output is correct
20 Correct 75 ms 72668 KB Output is correct
21 Correct 73 ms 72824 KB Output is correct
22 Correct 72 ms 72696 KB Output is correct
23 Correct 73 ms 72696 KB Output is correct
24 Correct 73 ms 72824 KB Output is correct
25 Correct 73 ms 72788 KB Output is correct
26 Correct 200 ms 77280 KB Output is correct
27 Correct 241 ms 76920 KB Output is correct
28 Correct 87 ms 72952 KB Output is correct
29 Correct 73 ms 72796 KB Output is correct
30 Correct 88 ms 72696 KB Output is correct
31 Correct 237 ms 76876 KB Output is correct
32 Correct 74 ms 72952 KB Output is correct
33 Correct 351 ms 82680 KB Output is correct
34 Correct 249 ms 76920 KB Output is correct
35 Correct 75 ms 72952 KB Output is correct
36 Correct 298 ms 77432 KB Output is correct
37 Correct 59 ms 63224 KB Output is correct
38 Correct 75 ms 72952 KB Output is correct
39 Correct 192 ms 77200 KB Output is correct
40 Correct 59 ms 63352 KB Output is correct
41 Correct 155 ms 67956 KB Output is correct
42 Correct 338 ms 79836 KB Output is correct
43 Correct 74 ms 72696 KB Output is correct
44 Correct 194 ms 73816 KB Output is correct
45 Correct 302 ms 79956 KB Output is correct
46 Correct 74 ms 72824 KB Output is correct
47 Correct 77 ms 73044 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 182 ms 77296 KB Output is correct
2 Correct 293 ms 80240 KB Output is correct
3 Correct 79 ms 72908 KB Output is correct
4 Correct 78 ms 72820 KB Output is correct
5 Correct 73 ms 72796 KB Output is correct
6 Correct 72 ms 72696 KB Output is correct
7 Correct 75 ms 72952 KB Output is correct
8 Correct 287 ms 78456 KB Output is correct
9 Correct 76 ms 72932 KB Output is correct
10 Correct 249 ms 77432 KB Output is correct
11 Correct 73 ms 72696 KB Output is correct
12 Correct 308 ms 77408 KB Output is correct
13 Correct 281 ms 78212 KB Output is correct
14 Correct 261 ms 79992 KB Output is correct
15 Correct 188 ms 77184 KB Output is correct
16 Correct 76 ms 72952 KB Output is correct
17 Correct 72 ms 72824 KB Output is correct
18 Correct 217 ms 79908 KB Output is correct
19 Correct 426 ms 85240 KB Output is correct
20 Correct 80 ms 72956 KB Output is correct
21 Correct 72 ms 72696 KB Output is correct
22 Correct 207 ms 78672 KB Output is correct
23 Correct 76 ms 72972 KB Output is correct
24 Correct 313 ms 77668 KB Output is correct
25 Correct 391 ms 82020 KB Output is correct
26 Correct 76 ms 72952 KB Output is correct
27 Correct 77 ms 73080 KB Output is correct
28 Correct 76 ms 72868 KB Output is correct
29 Correct 79 ms 72824 KB Output is correct
30 Correct 91 ms 72952 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 72696 KB Output is correct
2 Correct 74 ms 72696 KB Output is correct
3 Correct 73 ms 72724 KB Output is correct
4 Correct 72 ms 72696 KB Output is correct
5 Correct 72 ms 72760 KB Output is correct
6 Correct 57 ms 62968 KB Output is correct
7 Correct 57 ms 62968 KB Output is correct
8 Correct 73 ms 72824 KB Output is correct
9 Correct 72 ms 72760 KB Output is correct
10 Correct 72 ms 72696 KB Output is correct
11 Correct 72 ms 72824 KB Output is correct
12 Correct 72 ms 72696 KB Output is correct
13 Correct 73 ms 72668 KB Output is correct
14 Correct 73 ms 72696 KB Output is correct
15 Correct 73 ms 72696 KB Output is correct
16 Correct 74 ms 72772 KB Output is correct
17 Correct 75 ms 72696 KB Output is correct
18 Correct 74 ms 72696 KB Output is correct
19 Correct 74 ms 72696 KB Output is correct
20 Correct 75 ms 72668 KB Output is correct
21 Correct 73 ms 72824 KB Output is correct
22 Correct 72 ms 72696 KB Output is correct
23 Correct 73 ms 72696 KB Output is correct
24 Correct 73 ms 72824 KB Output is correct
25 Correct 72 ms 72696 KB Output is correct
26 Correct 76 ms 72952 KB Output is correct
27 Correct 75 ms 72920 KB Output is correct
28 Correct 76 ms 73052 KB Output is correct
29 Correct 76 ms 72924 KB Output is correct
30 Correct 75 ms 72824 KB Output is correct
31 Correct 72 ms 72832 KB Output is correct
32 Correct 76 ms 73080 KB Output is correct
33 Correct 72 ms 72680 KB Output is correct
34 Correct 74 ms 72952 KB Output is correct
35 Correct 76 ms 72952 KB Output is correct
36 Correct 75 ms 72952 KB Output is correct
37 Correct 75 ms 72952 KB Output is correct
38 Correct 73 ms 72952 KB Output is correct
39 Correct 76 ms 72952 KB Output is correct
40 Correct 58 ms 63096 KB Output is correct
41 Correct 75 ms 72940 KB Output is correct
42 Correct 74 ms 72952 KB Output is correct
43 Correct 59 ms 63352 KB Output is correct
44 Correct 72 ms 72696 KB Output is correct
45 Correct 77 ms 73144 KB Output is correct
46 Correct 93 ms 72952 KB Output is correct
47 Correct 72 ms 72796 KB Output is correct
48 Correct 76 ms 72924 KB Output is correct
49 Correct 74 ms 72924 KB Output is correct
50 Correct 75 ms 73080 KB Output is correct
51 Correct 75 ms 72824 KB Output is correct
52 Correct 74 ms 72824 KB Output is correct
53 Correct 77 ms 72952 KB Output is correct
54 Correct 75 ms 72952 KB Output is correct
55 Correct 73 ms 72788 KB Output is correct
56 Correct 200 ms 77280 KB Output is correct
57 Correct 241 ms 76920 KB Output is correct
58 Correct 87 ms 72952 KB Output is correct
59 Correct 73 ms 72796 KB Output is correct
60 Correct 88 ms 72696 KB Output is correct
61 Correct 237 ms 76876 KB Output is correct
62 Correct 74 ms 72952 KB Output is correct
63 Correct 351 ms 82680 KB Output is correct
64 Correct 249 ms 76920 KB Output is correct
65 Correct 75 ms 72952 KB Output is correct
66 Correct 298 ms 77432 KB Output is correct
67 Correct 59 ms 63224 KB Output is correct
68 Correct 75 ms 72952 KB Output is correct
69 Correct 192 ms 77200 KB Output is correct
70 Correct 59 ms 63352 KB Output is correct
71 Correct 155 ms 67956 KB Output is correct
72 Correct 338 ms 79836 KB Output is correct
73 Correct 74 ms 72696 KB Output is correct
74 Correct 194 ms 73816 KB Output is correct
75 Correct 302 ms 79956 KB Output is correct
76 Correct 74 ms 72824 KB Output is correct
77 Correct 77 ms 73044 KB Output is correct
78 Correct 182 ms 77296 KB Output is correct
79 Correct 293 ms 80240 KB Output is correct
80 Correct 79 ms 72908 KB Output is correct
81 Correct 78 ms 72820 KB Output is correct
82 Correct 73 ms 72796 KB Output is correct
83 Correct 72 ms 72696 KB Output is correct
84 Correct 75 ms 72952 KB Output is correct
85 Correct 287 ms 78456 KB Output is correct
86 Correct 76 ms 72932 KB Output is correct
87 Correct 249 ms 77432 KB Output is correct
88 Correct 73 ms 72696 KB Output is correct
89 Correct 308 ms 77408 KB Output is correct
90 Correct 281 ms 78212 KB Output is correct
91 Correct 261 ms 79992 KB Output is correct
92 Correct 188 ms 77184 KB Output is correct
93 Correct 76 ms 72952 KB Output is correct
94 Correct 72 ms 72824 KB Output is correct
95 Correct 217 ms 79908 KB Output is correct
96 Correct 426 ms 85240 KB Output is correct
97 Correct 80 ms 72956 KB Output is correct
98 Correct 72 ms 72696 KB Output is correct
99 Correct 207 ms 78672 KB Output is correct
100 Correct 76 ms 72972 KB Output is correct
101 Correct 313 ms 77668 KB Output is correct
102 Correct 391 ms 82020 KB Output is correct
103 Correct 76 ms 72952 KB Output is correct
104 Correct 77 ms 73080 KB Output is correct
105 Correct 76 ms 72868 KB Output is correct
106 Correct 79 ms 72824 KB Output is correct
107 Correct 91 ms 72952 KB Output is correct
108 Correct 1100 ms 100788 KB Output is correct
109 Correct 2103 ms 108912 KB Output is correct
110 Correct 1085 ms 110564 KB Output is correct
111 Correct 2243 ms 125028 KB Output is correct
112 Correct 2124 ms 122468 KB Output is correct
113 Correct 1243 ms 108624 KB Output is correct
114 Incorrect 1321 ms 93408 KB Output isn't correct
115 Halted 0 ms 0 KB -