oj.uz

Submission #138094

# Submission time Handle Problem Language Result Execution time Memory
138094 2019-07-29T10:25:38 Z Mahmoud_Adel Mergers (JOI19_mergers) C++14
70 / 100
 2158 ms 125756 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) 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 72 ms 72824 KB Output is correct
3 Correct 73 ms 72696 KB Output is correct
4 Correct 73 ms 72952 KB Output is correct
5 Correct 72 ms 72696 KB Output is correct
6 Correct 57 ms 62968 KB Output is correct
7 Correct 57 ms 62968 KB Output is correct
8 Correct 72 ms 72696 KB Output is correct
9 Correct 73 ms 72740 KB Output is correct
10 Correct 72 ms 72696 KB Output is correct
11 Correct 72 ms 72696 KB Output is correct
12 Correct 73 ms 72680 KB Output is correct
13 Correct 73 ms 72696 KB Output is correct
14 Correct 72 ms 72696 KB Output is correct
15 Correct 80 ms 72724 KB Output is correct
16 Correct 72 ms 72752 KB Output is correct
17 Correct 73 ms 72696 KB Output is correct
18 Correct 73 ms 72824 KB Output is correct
19 Correct 74 ms 72800 KB Output is correct
20 Correct 72 ms 72824 KB Output is correct
21 Correct 72 ms 72696 KB Output is correct
22 Correct 75 ms 72828 KB Output is correct
23 Correct 73 ms 72704 KB Output is correct
24 Correct 73 ms 72760 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 72 ms 72824 KB Output is correct
3 Correct 73 ms 72696 KB Output is correct
4 Correct 73 ms 72952 KB Output is correct
5 Correct 72 ms 72696 KB Output is correct
6 Correct 57 ms 62968 KB Output is correct
7 Correct 57 ms 62968 KB Output is correct
8 Correct 72 ms 72696 KB Output is correct
9 Correct 73 ms 72740 KB Output is correct
10 Correct 72 ms 72696 KB Output is correct
11 Correct 72 ms 72696 KB Output is correct
12 Correct 73 ms 72680 KB Output is correct
13 Correct 73 ms 72696 KB Output is correct
14 Correct 72 ms 72696 KB Output is correct
15 Correct 80 ms 72724 KB Output is correct
16 Correct 72 ms 72752 KB Output is correct
17 Correct 73 ms 72696 KB Output is correct
18 Correct 73 ms 72824 KB Output is correct
19 Correct 74 ms 72800 KB Output is correct
20 Correct 72 ms 72824 KB Output is correct
21 Correct 72 ms 72696 KB Output is correct
22 Correct 75 ms 72828 KB Output is correct
23 Correct 73 ms 72704 KB Output is correct
24 Correct 73 ms 72760 KB Output is correct
25 Correct 73 ms 72768 KB Output is correct
26 Correct 76 ms 72924 KB Output is correct
27 Correct 76 ms 72928 KB Output is correct
28 Correct 75 ms 72952 KB Output is correct
29 Correct 76 ms 72952 KB Output is correct
30 Correct 76 ms 72824 KB Output is correct
31 Correct 72 ms 72696 KB Output is correct
32 Correct 78 ms 73116 KB Output is correct
33 Correct 72 ms 72824 KB Output is correct
34 Correct 75 ms 72952 KB Output is correct
35 Correct 75 ms 72952 KB Output is correct
36 Correct 76 ms 72840 KB Output is correct
37 Correct 77 ms 73012 KB Output is correct
38 Correct 73 ms 72828 KB Output is correct
39 Correct 76 ms 72952 KB Output is correct
40 Correct 59 ms 63224 KB Output is correct
41 Correct 76 ms 72952 KB Output is correct
42 Correct 75 ms 72952 KB Output is correct
43 Correct 59 ms 63352 KB Output is correct
44 Correct 73 ms 72824 KB Output is correct
45 Correct 76 ms 73052 KB Output is correct
46 Correct 76 ms 72952 KB Output is correct
47 Correct 84 ms 72752 KB Output is correct
48 Correct 93 ms 72952 KB Output is correct
49 Correct 75 ms 72952 KB Output is correct
50 Correct 77 ms 73080 KB Output is correct
51 Correct 76 ms 72856 KB Output is correct
52 Correct 74 ms 72988 KB Output is correct
53 Correct 75 ms 72916 KB Output is correct
54 Correct 76 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 72 ms 72824 KB Output is correct
3 Correct 73 ms 72696 KB Output is correct
4 Correct 73 ms 72952 KB Output is correct
5 Correct 72 ms 72696 KB Output is correct
6 Correct 57 ms 62968 KB Output is correct
7 Correct 57 ms 62968 KB Output is correct
8 Correct 72 ms 72696 KB Output is correct
9 Correct 73 ms 72740 KB Output is correct
10 Correct 72 ms 72696 KB Output is correct
11 Correct 72 ms 72696 KB Output is correct
12 Correct 73 ms 72680 KB Output is correct
13 Correct 73 ms 72696 KB Output is correct
14 Correct 72 ms 72696 KB Output is correct
15 Correct 80 ms 72724 KB Output is correct
16 Correct 72 ms 72752 KB Output is correct
17 Correct 73 ms 72696 KB Output is correct
18 Correct 73 ms 72824 KB Output is correct
19 Correct 74 ms 72800 KB Output is correct
20 Correct 72 ms 72824 KB Output is correct
21 Correct 72 ms 72696 KB Output is correct
22 Correct 75 ms 72828 KB Output is correct
23 Correct 73 ms 72704 KB Output is correct
24 Correct 73 ms 72760 KB Output is correct
25 Correct 74 ms 72816 KB Output is correct
26 Correct 185 ms 77280 KB Output is correct
27 Correct 233 ms 76916 KB Output is correct
28 Correct 76 ms 72828 KB Output is correct
29 Correct 72 ms 72824 KB Output is correct
30 Correct 72 ms 72744 KB Output is correct
31 Correct 236 ms 76940 KB Output is correct
32 Correct 74 ms 73080 KB Output is correct
33 Correct 326 ms 82524 KB Output is correct
34 Correct 260 ms 77060 KB Output is correct
35 Correct 75 ms 72828 KB Output is correct
36 Correct 297 ms 77928 KB Output is correct
37 Correct 60 ms 63224 KB Output is correct
38 Correct 75 ms 72952 KB Output is correct
39 Correct 180 ms 77712 KB Output is correct
40 Correct 60 ms 63352 KB Output is correct
41 Correct 179 ms 69092 KB Output is correct
42 Correct 310 ms 80120 KB Output is correct
43 Correct 74 ms 72696 KB Output is correct
44 Correct 222 ms 75096 KB Output is correct
45 Correct 288 ms 80376 KB Output is correct
46 Correct 75 ms 72952 KB Output is correct
47 Correct 77 ms 72952 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 177 ms 77252 KB Output is correct
2 Correct 219 ms 80120 KB Output is correct
3 Correct 76 ms 72932 KB Output is correct
4 Correct 83 ms 72896 KB Output is correct
5 Correct 72 ms 72824 KB Output is correct
6 Correct 72 ms 72680 KB Output is correct
7 Correct 75 ms 72952 KB Output is correct
8 Correct 284 ms 78392 KB Output is correct
9 Correct 76 ms 72952 KB Output is correct
10 Correct 243 ms 77304 KB Output is correct
11 Correct 73 ms 72700 KB Output is correct
12 Correct 299 ms 77708 KB Output is correct
13 Correct 396 ms 78712 KB Output is correct
14 Correct 267 ms 80376 KB Output is correct
15 Correct 182 ms 77552 KB Output is correct
16 Correct 76 ms 72952 KB Output is correct
17 Correct 73 ms 72824 KB Output is correct
18 Correct 210 ms 80192 KB Output is correct
19 Correct 337 ms 85496 KB Output is correct
20 Correct 90 ms 72952 KB Output is correct
21 Correct 78 ms 72568 KB Output is correct
22 Correct 205 ms 78960 KB Output is correct
23 Correct 92 ms 72924 KB Output is correct
24 Correct 304 ms 78120 KB Output is correct
25 Correct 297 ms 82428 KB Output is correct
26 Correct 76 ms 73080 KB Output is correct
27 Correct 76 ms 73080 KB Output is correct
28 Correct 77 ms 72924 KB Output is correct
29 Correct 88 ms 73076 KB Output is correct
30 Correct 75 ms 72924 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 72 ms 72824 KB Output is correct
3 Correct 73 ms 72696 KB Output is correct
4 Correct 73 ms 72952 KB Output is correct
5 Correct 72 ms 72696 KB Output is correct
6 Correct 57 ms 62968 KB Output is correct
7 Correct 57 ms 62968 KB Output is correct
8 Correct 72 ms 72696 KB Output is correct
9 Correct 73 ms 72740 KB Output is correct
10 Correct 72 ms 72696 KB Output is correct
11 Correct 72 ms 72696 KB Output is correct
12 Correct 73 ms 72680 KB Output is correct
13 Correct 73 ms 72696 KB Output is correct
14 Correct 72 ms 72696 KB Output is correct
15 Correct 80 ms 72724 KB Output is correct
16 Correct 72 ms 72752 KB Output is correct
17 Correct 73 ms 72696 KB Output is correct
18 Correct 73 ms 72824 KB Output is correct
19 Correct 74 ms 72800 KB Output is correct
20 Correct 72 ms 72824 KB Output is correct
21 Correct 72 ms 72696 KB Output is correct
22 Correct 75 ms 72828 KB Output is correct
23 Correct 73 ms 72704 KB Output is correct
24 Correct 73 ms 72760 KB Output is correct
25 Correct 73 ms 72768 KB Output is correct
26 Correct 76 ms 72924 KB Output is correct
27 Correct 76 ms 72928 KB Output is correct
28 Correct 75 ms 72952 KB Output is correct
29 Correct 76 ms 72952 KB Output is correct
30 Correct 76 ms 72824 KB Output is correct
31 Correct 72 ms 72696 KB Output is correct
32 Correct 78 ms 73116 KB Output is correct
33 Correct 72 ms 72824 KB Output is correct
34 Correct 75 ms 72952 KB Output is correct
35 Correct 75 ms 72952 KB Output is correct
36 Correct 76 ms 72840 KB Output is correct
37 Correct 77 ms 73012 KB Output is correct
38 Correct 73 ms 72828 KB Output is correct
39 Correct 76 ms 72952 KB Output is correct
40 Correct 59 ms 63224 KB Output is correct
41 Correct 76 ms 72952 KB Output is correct
42 Correct 75 ms 72952 KB Output is correct
43 Correct 59 ms 63352 KB Output is correct
44 Correct 73 ms 72824 KB Output is correct
45 Correct 76 ms 73052 KB Output is correct
46 Correct 76 ms 72952 KB Output is correct
47 Correct 84 ms 72752 KB Output is correct
48 Correct 93 ms 72952 KB Output is correct
49 Correct 75 ms 72952 KB Output is correct
50 Correct 77 ms 73080 KB Output is correct
51 Correct 76 ms 72856 KB Output is correct
52 Correct 74 ms 72988 KB Output is correct
53 Correct 75 ms 72916 KB Output is correct
54 Correct 76 ms 72952 KB Output is correct
55 Correct 74 ms 72816 KB Output is correct
56 Correct 185 ms 77280 KB Output is correct
57 Correct 233 ms 76916 KB Output is correct
58 Correct 76 ms 72828 KB Output is correct
59 Correct 72 ms 72824 KB Output is correct
60 Correct 72 ms 72744 KB Output is correct
61 Correct 236 ms 76940 KB Output is correct
62 Correct 74 ms 73080 KB Output is correct
63 Correct 326 ms 82524 KB Output is correct
64 Correct 260 ms 77060 KB Output is correct
65 Correct 75 ms 72828 KB Output is correct
66 Correct 297 ms 77928 KB Output is correct
67 Correct 60 ms 63224 KB Output is correct
68 Correct 75 ms 72952 KB Output is correct
69 Correct 180 ms 77712 KB Output is correct
70 Correct 60 ms 63352 KB Output is correct
71 Correct 179 ms 69092 KB Output is correct
72 Correct 310 ms 80120 KB Output is correct
73 Correct 74 ms 72696 KB Output is correct
74 Correct 222 ms 75096 KB Output is correct
75 Correct 288 ms 80376 KB Output is correct
76 Correct 75 ms 72952 KB Output is correct
77 Correct 77 ms 72952 KB Output is correct
78 Correct 177 ms 77252 KB Output is correct
79 Correct 219 ms 80120 KB Output is correct
80 Correct 76 ms 72932 KB Output is correct
81 Correct 83 ms 72896 KB Output is correct
82 Correct 72 ms 72824 KB Output is correct
83 Correct 72 ms 72680 KB Output is correct
84 Correct 75 ms 72952 KB Output is correct
85 Correct 284 ms 78392 KB Output is correct
86 Correct 76 ms 72952 KB Output is correct
87 Correct 243 ms 77304 KB Output is correct
88 Correct 73 ms 72700 KB Output is correct
89 Correct 299 ms 77708 KB Output is correct
90 Correct 396 ms 78712 KB Output is correct
91 Correct 267 ms 80376 KB Output is correct
92 Correct 182 ms 77552 KB Output is correct
93 Correct 76 ms 72952 KB Output is correct
94 Correct 73 ms 72824 KB Output is correct
95 Correct 210 ms 80192 KB Output is correct
96 Correct 337 ms 85496 KB Output is correct
97 Correct 90 ms 72952 KB Output is correct
98 Correct 78 ms 72568 KB Output is correct
99 Correct 205 ms 78960 KB Output is correct
100 Correct 92 ms 72924 KB Output is correct
101 Correct 304 ms 78120 KB Output is correct
102 Correct 297 ms 82428 KB Output is correct
103 Correct 76 ms 73080 KB Output is correct
104 Correct 76 ms 73080 KB Output is correct
105 Correct 77 ms 72924 KB Output is correct
106 Correct 88 ms 73076 KB Output is correct
107 Correct 75 ms 72924 KB Output is correct
108 Correct 1101 ms 101504 KB Output is correct
109 Correct 2151 ms 109620 KB Output is correct
110 Correct 1392 ms 115208 KB Output is correct
111 Correct 2158 ms 125756 KB Output is correct
112 Correct 2118 ms 122984 KB Output is correct
113 Correct 1151 ms 109004 KB Output is correct
114 Incorrect 1290 ms 93988 KB Output isn't correct
115 Halted 0 ms 0 KB -