oj.uz

Submission #138140

# Submission time Handle Problem Language Result Execution time Memory
138140 2019-07-29T12:06:26 Z Mahmoud_Adel Mergers (JOI19_mergers) C++14
100 / 100
 1517 ms 127208 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][21], sub[N], ret[N], mark[N], deg[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<21; 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<21; 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=20; 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, int last)
{
	for(int v : adj[u]) if(p != v)
	{
		if(mark[v] && mark[last]) deg[v]++, deg[last]++, DFS(v, u, v);
		else DFS(v, u, last);
	}
}
int main()
{
	scanf("%d %d", &n, &m);
	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] += (int)vec[i].size();
		assert(node);
	}
	calc(1, 0);
	DFS(1, 0, 1);
	for(int i=1; i<=n; i++) ans += (deg[i]==1);
	cout << (ans+1)/2 << endl;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:46:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:48:21: 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:49:44: 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 23 ms 23800 KB Output is correct
2 Correct 24 ms 23928 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 28 ms 23900 KB Output is correct
5 Correct 24 ms 23800 KB Output is correct
6 Correct 24 ms 23800 KB Output is correct
7 Correct 23 ms 23800 KB Output is correct
8 Correct 22 ms 23928 KB Output is correct
9 Correct 23 ms 23800 KB Output is correct
10 Correct 24 ms 23928 KB Output is correct
11 Correct 24 ms 23804 KB Output is correct
12 Correct 28 ms 23928 KB Output is correct
13 Correct 24 ms 23928 KB Output is correct
14 Correct 24 ms 23928 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 29 ms 23928 KB Output is correct
17 Correct 23 ms 23928 KB Output is correct
18 Correct 24 ms 23800 KB Output is correct
19 Correct 24 ms 23800 KB Output is correct
20 Correct 24 ms 23928 KB Output is correct
21 Correct 24 ms 23928 KB Output is correct
22 Correct 23 ms 23800 KB Output is correct
23 Correct 28 ms 23928 KB Output is correct
24 Correct 29 ms 24056 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 23928 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 28 ms 23900 KB Output is correct
5 Correct 24 ms 23800 KB Output is correct
6 Correct 24 ms 23800 KB Output is correct
7 Correct 23 ms 23800 KB Output is correct
8 Correct 22 ms 23928 KB Output is correct
9 Correct 23 ms 23800 KB Output is correct
10 Correct 24 ms 23928 KB Output is correct
11 Correct 24 ms 23804 KB Output is correct
12 Correct 28 ms 23928 KB Output is correct
13 Correct 24 ms 23928 KB Output is correct
14 Correct 24 ms 23928 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 29 ms 23928 KB Output is correct
17 Correct 23 ms 23928 KB Output is correct
18 Correct 24 ms 23800 KB Output is correct
19 Correct 24 ms 23800 KB Output is correct
20 Correct 24 ms 23928 KB Output is correct
21 Correct 24 ms 23928 KB Output is correct
22 Correct 23 ms 23800 KB Output is correct
23 Correct 28 ms 23928 KB Output is correct
24 Correct 29 ms 24056 KB Output is correct
25 Correct 24 ms 23800 KB Output is correct
26 Correct 26 ms 24312 KB Output is correct
27 Correct 26 ms 24312 KB Output is correct
28 Correct 26 ms 24440 KB Output is correct
29 Correct 27 ms 24444 KB Output is correct
30 Correct 31 ms 24312 KB Output is correct
31 Correct 29 ms 23800 KB Output is correct
32 Correct 27 ms 24440 KB Output is correct
33 Correct 23 ms 23928 KB Output is correct
34 Correct 29 ms 24312 KB Output is correct
35 Correct 27 ms 24312 KB Output is correct
36 Correct 26 ms 24312 KB Output is correct
37 Correct 27 ms 24312 KB Output is correct
38 Correct 24 ms 23856 KB Output is correct
39 Correct 27 ms 24312 KB Output is correct
40 Correct 26 ms 24312 KB Output is correct
41 Correct 26 ms 24312 KB Output is correct
42 Correct 31 ms 24356 KB Output is correct
43 Correct 27 ms 24440 KB Output is correct
44 Correct 24 ms 23932 KB Output is correct
45 Correct 28 ms 24440 KB Output is correct
46 Correct 26 ms 24312 KB Output is correct
47 Correct 23 ms 23928 KB Output is correct
48 Correct 27 ms 24440 KB Output is correct
49 Correct 26 ms 24448 KB Output is correct
50 Correct 26 ms 24440 KB Output is correct
51 Correct 26 ms 24300 KB Output is correct
52 Correct 25 ms 24312 KB Output is correct
53 Correct 26 ms 24312 KB Output is correct
54 Correct 26 ms 24184 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 23928 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 28 ms 23900 KB Output is correct
5 Correct 24 ms 23800 KB Output is correct
6 Correct 24 ms 23800 KB Output is correct
7 Correct 23 ms 23800 KB Output is correct
8 Correct 22 ms 23928 KB Output is correct
9 Correct 23 ms 23800 KB Output is correct
10 Correct 24 ms 23928 KB Output is correct
11 Correct 24 ms 23804 KB Output is correct
12 Correct 28 ms 23928 KB Output is correct
13 Correct 24 ms 23928 KB Output is correct
14 Correct 24 ms 23928 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 29 ms 23928 KB Output is correct
17 Correct 23 ms 23928 KB Output is correct
18 Correct 24 ms 23800 KB Output is correct
19 Correct 24 ms 23800 KB Output is correct
20 Correct 24 ms 23928 KB Output is correct
21 Correct 24 ms 23928 KB Output is correct
22 Correct 23 ms 23800 KB Output is correct
23 Correct 28 ms 23928 KB Output is correct
24 Correct 29 ms 24056 KB Output is correct
25 Correct 24 ms 23840 KB Output is correct
26 Correct 120 ms 37404 KB Output is correct
27 Correct 150 ms 37368 KB Output is correct
28 Correct 26 ms 24312 KB Output is correct
29 Correct 24 ms 23928 KB Output is correct
30 Correct 28 ms 23928 KB Output is correct
31 Correct 148 ms 37624 KB Output is correct
32 Correct 31 ms 24312 KB Output is correct
33 Correct 295 ms 43256 KB Output is correct
34 Correct 184 ms 37460 KB Output is correct
35 Correct 26 ms 24312 KB Output is correct
36 Correct 175 ms 38140 KB Output is correct
37 Correct 26 ms 24316 KB Output is correct
38 Correct 26 ms 24312 KB Output is correct
39 Correct 113 ms 37332 KB Output is correct
40 Correct 27 ms 24440 KB Output is correct
41 Correct 148 ms 37488 KB Output is correct
42 Correct 199 ms 39516 KB Output is correct
43 Correct 23 ms 23800 KB Output is correct
44 Correct 202 ms 43388 KB Output is correct
45 Correct 192 ms 40448 KB Output is correct
46 Correct 26 ms 24312 KB Output is correct
47 Correct 26 ms 24312 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 115 ms 37488 KB Output is correct
2 Correct 135 ms 41128 KB Output is correct
3 Correct 32 ms 24312 KB Output is correct
4 Correct 26 ms 24312 KB Output is correct
5 Correct 27 ms 23928 KB Output is correct
6 Correct 29 ms 23928 KB Output is correct
7 Correct 26 ms 24312 KB Output is correct
8 Correct 189 ms 39304 KB Output is correct
9 Correct 26 ms 24312 KB Output is correct
10 Correct 200 ms 38276 KB Output is correct
11 Correct 30 ms 23800 KB Output is correct
12 Correct 248 ms 38244 KB Output is correct
13 Correct 184 ms 39148 KB Output is correct
14 Correct 252 ms 40784 KB Output is correct
15 Correct 115 ms 37232 KB Output is correct
16 Correct 26 ms 24312 KB Output is correct
17 Correct 24 ms 23800 KB Output is correct
18 Correct 146 ms 40816 KB Output is correct
19 Correct 210 ms 44008 KB Output is correct
20 Correct 27 ms 24312 KB Output is correct
21 Correct 23 ms 23928 KB Output is correct
22 Correct 133 ms 39532 KB Output is correct
23 Correct 26 ms 24440 KB Output is correct
24 Correct 238 ms 38616 KB Output is correct
25 Correct 199 ms 42900 KB Output is correct
26 Correct 26 ms 24312 KB Output is correct
27 Correct 26 ms 24440 KB Output is correct
28 Correct 27 ms 24312 KB Output is correct
29 Correct 25 ms 24312 KB Output is correct
30 Correct 26 ms 24312 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 23928 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 28 ms 23900 KB Output is correct
5 Correct 24 ms 23800 KB Output is correct
6 Correct 24 ms 23800 KB Output is correct
7 Correct 23 ms 23800 KB Output is correct
8 Correct 22 ms 23928 KB Output is correct
9 Correct 23 ms 23800 KB Output is correct
10 Correct 24 ms 23928 KB Output is correct
11 Correct 24 ms 23804 KB Output is correct
12 Correct 28 ms 23928 KB Output is correct
13 Correct 24 ms 23928 KB Output is correct
14 Correct 24 ms 23928 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 29 ms 23928 KB Output is correct
17 Correct 23 ms 23928 KB Output is correct
18 Correct 24 ms 23800 KB Output is correct
19 Correct 24 ms 23800 KB Output is correct
20 Correct 24 ms 23928 KB Output is correct
21 Correct 24 ms 23928 KB Output is correct
22 Correct 23 ms 23800 KB Output is correct
23 Correct 28 ms 23928 KB Output is correct
24 Correct 29 ms 24056 KB Output is correct
25 Correct 24 ms 23800 KB Output is correct
26 Correct 26 ms 24312 KB Output is correct
27 Correct 26 ms 24312 KB Output is correct
28 Correct 26 ms 24440 KB Output is correct
29 Correct 27 ms 24444 KB Output is correct
30 Correct 31 ms 24312 KB Output is correct
31 Correct 29 ms 23800 KB Output is correct
32 Correct 27 ms 24440 KB Output is correct
33 Correct 23 ms 23928 KB Output is correct
34 Correct 29 ms 24312 KB Output is correct
35 Correct 27 ms 24312 KB Output is correct
36 Correct 26 ms 24312 KB Output is correct
37 Correct 27 ms 24312 KB Output is correct
38 Correct 24 ms 23856 KB Output is correct
39 Correct 27 ms 24312 KB Output is correct
40 Correct 26 ms 24312 KB Output is correct
41 Correct 26 ms 24312 KB Output is correct
42 Correct 31 ms 24356 KB Output is correct
43 Correct 27 ms 24440 KB Output is correct
44 Correct 24 ms 23932 KB Output is correct
45 Correct 28 ms 24440 KB Output is correct
46 Correct 26 ms 24312 KB Output is correct
47 Correct 23 ms 23928 KB Output is correct
48 Correct 27 ms 24440 KB Output is correct
49 Correct 26 ms 24448 KB Output is correct
50 Correct 26 ms 24440 KB Output is correct
51 Correct 26 ms 24300 KB Output is correct
52 Correct 25 ms 24312 KB Output is correct
53 Correct 26 ms 24312 KB Output is correct
54 Correct 26 ms 24184 KB Output is correct
55 Correct 24 ms 23840 KB Output is correct
56 Correct 120 ms 37404 KB Output is correct
57 Correct 150 ms 37368 KB Output is correct
58 Correct 26 ms 24312 KB Output is correct
59 Correct 24 ms 23928 KB Output is correct
60 Correct 28 ms 23928 KB Output is correct
61 Correct 148 ms 37624 KB Output is correct
62 Correct 31 ms 24312 KB Output is correct
63 Correct 295 ms 43256 KB Output is correct
64 Correct 184 ms 37460 KB Output is correct
65 Correct 26 ms 24312 KB Output is correct
66 Correct 175 ms 38140 KB Output is correct
67 Correct 26 ms 24316 KB Output is correct
68 Correct 26 ms 24312 KB Output is correct
69 Correct 113 ms 37332 KB Output is correct
70 Correct 27 ms 24440 KB Output is correct
71 Correct 148 ms 37488 KB Output is correct
72 Correct 199 ms 39516 KB Output is correct
73 Correct 23 ms 23800 KB Output is correct
74 Correct 202 ms 43388 KB Output is correct
75 Correct 192 ms 40448 KB Output is correct
76 Correct 26 ms 24312 KB Output is correct
77 Correct 26 ms 24312 KB Output is correct
78 Correct 115 ms 37488 KB Output is correct
79 Correct 135 ms 41128 KB Output is correct
80 Correct 32 ms 24312 KB Output is correct
81 Correct 26 ms 24312 KB Output is correct
82 Correct 27 ms 23928 KB Output is correct
83 Correct 29 ms 23928 KB Output is correct
84 Correct 26 ms 24312 KB Output is correct
85 Correct 189 ms 39304 KB Output is correct
86 Correct 26 ms 24312 KB Output is correct
87 Correct 200 ms 38276 KB Output is correct
88 Correct 30 ms 23800 KB Output is correct
89 Correct 248 ms 38244 KB Output is correct
90 Correct 184 ms 39148 KB Output is correct
91 Correct 252 ms 40784 KB Output is correct
92 Correct 115 ms 37232 KB Output is correct
93 Correct 26 ms 24312 KB Output is correct
94 Correct 24 ms 23800 KB Output is correct
95 Correct 146 ms 40816 KB Output is correct
96 Correct 210 ms 44008 KB Output is correct
97 Correct 27 ms 24312 KB Output is correct
98 Correct 23 ms 23928 KB Output is correct
99 Correct 133 ms 39532 KB Output is correct
100 Correct 26 ms 24440 KB Output is correct
101 Correct 238 ms 38616 KB Output is correct
102 Correct 199 ms 42900 KB Output is correct
103 Correct 26 ms 24312 KB Output is correct
104 Correct 26 ms 24440 KB Output is correct
105 Correct 27 ms 24312 KB Output is correct
106 Correct 25 ms 24312 KB Output is correct
107 Correct 26 ms 24312 KB Output is correct
108 Correct 774 ms 100940 KB Output is correct
109 Correct 1317 ms 105504 KB Output is correct
110 Correct 1494 ms 114552 KB Output is correct
111 Correct 1487 ms 127208 KB Output is correct
112 Correct 1517 ms 119132 KB Output is correct
113 Correct 874 ms 108560 KB Output is correct
114 Correct 890 ms 91280 KB Output is correct
115 Correct 992 ms 97776 KB Output is correct
116 Correct 1089 ms 103804 KB Output is correct
117 Correct 1260 ms 114732 KB Output is correct
118 Correct 1002 ms 100272 KB Output is correct
119 Correct 1394 ms 114768 KB Output is correct
120 Correct 1489 ms 125584 KB Output is correct
121 Correct 1172 ms 114512 KB Output is correct
122 Correct 1152 ms 108512 KB Output is correct
123 Correct 904 ms 115940 KB Output is correct
124 Correct 1268 ms 112728 KB Output is correct