oj.uz

Submission #374718

# Submission time Handle Problem Language Result Execution time Memory
374718 2021-03-08T02:11:46 Z guka415 Mergers (JOI19_mergers) C++14
100 / 100
 810 ms 98540 KB 
#define fast ios::sync_with_stdio(false); cin.tie(0)
#define foru(i, k, n) for (int i = k; i < n; i++)
#define ford(i, k, n) for (int i = k; i >= n; i--)
#define pb push_back
#define mp make_pair

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <bitset>

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int sz = 6e5;
vector<int> adj[sz], reglst[sz];
int n, k;
int ufp[sz], reg[sz], dep[sz], treepar[sz], deg[sz];

void dfs(int src, int prv) {
	for (int x : adj[src]) {
		if (x != prv) {
			treepar[x] = src;
			dep[x] = dep[src] + 1;
			dfs(x, src);
		}
	}
}

int getpar(int x) {
	while (x != ufp[x]) {
		x = ufp[x] = ufp[ufp[x]];
	}
	return x;
}

void unite(int a, int b) {
	int para = getpar(a), parb = getpar(b);
	if (para != parb) {
		if (dep[para] < dep[parb])swap(para, parb);
		ufp[para] = parb;
	}
}

int main() {
	fast;
	cin >> n >> k;
	foru(i, 0, n - 1) {
		int x, y;
		cin >> x >> y;
		adj[--x].pb(--y);
		adj[y].pb(x);
	}
	foru(i, 0, n) {
		cin >> reg[i]; reglst[reg[i]].pb(i);
		ufp[i] = i;
	}
	treepar[0] = -1;
	dfs(0, -1);
	for (int r = 1; r <= k; r++) {
		for (int j = 1; j < reglst[r].size(); j++) {
			int x = getpar(reglst[r][0]), y = getpar(reglst[r][j]);
			while (x != y) {
				if (dep[x] < dep[y]) {
					unite(y, treepar[y]);
					y = getpar(y);
				}
				else {
					unite(x, treepar[x]);
					x = getpar(x);
				}
			}
		}
	}
	foru(i, 0, n) {
		for (int x : adj[i]) {
			if (dep[x] > dep[i] && getpar(x)!=getpar(i))
				deg[getpar(x)]++, deg[getpar(i)]++;
		}
	}
	int ret = 0;
	foru(i, 0, n)
		ret += (deg[i] == 1 && getpar(i) == i);
	cout << (ret + 1) / 2 << '\n';
	return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:66:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |   for (int j = 1; j < reglst[r].size(); j++) {
      |                   ~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28524 KB Output is correct
2 Correct 18 ms 28652 KB Output is correct
3 Correct 18 ms 28524 KB Output is correct
4 Correct 18 ms 28524 KB Output is correct
5 Correct 18 ms 28524 KB Output is correct
6 Correct 18 ms 28524 KB Output is correct
7 Correct 18 ms 28524 KB Output is correct
8 Correct 18 ms 28524 KB Output is correct
9 Correct 18 ms 28524 KB Output is correct
10 Correct 20 ms 28652 KB Output is correct
11 Correct 18 ms 28524 KB Output is correct
12 Correct 18 ms 28544 KB Output is correct
13 Correct 18 ms 28524 KB Output is correct
14 Correct 18 ms 28524 KB Output is correct
15 Correct 18 ms 28544 KB Output is correct
16 Correct 18 ms 28524 KB Output is correct
17 Correct 18 ms 28524 KB Output is correct
18 Correct 19 ms 28524 KB Output is correct
19 Correct 18 ms 28524 KB Output is correct
20 Correct 18 ms 28524 KB Output is correct
21 Correct 18 ms 28536 KB Output is correct
22 Correct 18 ms 28524 KB Output is correct
23 Correct 18 ms 28524 KB Output is correct
24 Correct 18 ms 28524 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28524 KB Output is correct
2 Correct 18 ms 28652 KB Output is correct
3 Correct 18 ms 28524 KB Output is correct
4 Correct 18 ms 28524 KB Output is correct
5 Correct 18 ms 28524 KB Output is correct
6 Correct 18 ms 28524 KB Output is correct
7 Correct 18 ms 28524 KB Output is correct
8 Correct 18 ms 28524 KB Output is correct
9 Correct 18 ms 28524 KB Output is correct
10 Correct 20 ms 28652 KB Output is correct
11 Correct 18 ms 28524 KB Output is correct
12 Correct 18 ms 28544 KB Output is correct
13 Correct 18 ms 28524 KB Output is correct
14 Correct 18 ms 28524 KB Output is correct
15 Correct 18 ms 28544 KB Output is correct
16 Correct 18 ms 28524 KB Output is correct
17 Correct 18 ms 28524 KB Output is correct
18 Correct 19 ms 28524 KB Output is correct
19 Correct 18 ms 28524 KB Output is correct
20 Correct 18 ms 28524 KB Output is correct
21 Correct 18 ms 28536 KB Output is correct
22 Correct 18 ms 28524 KB Output is correct
23 Correct 18 ms 28524 KB Output is correct
24 Correct 18 ms 28524 KB Output is correct
25 Correct 18 ms 28524 KB Output is correct
26 Correct 19 ms 28780 KB Output is correct
27 Correct 20 ms 28800 KB Output is correct
28 Correct 20 ms 28908 KB Output is correct
29 Correct 20 ms 28780 KB Output is correct
30 Correct 19 ms 28780 KB Output is correct
31 Correct 18 ms 28524 KB Output is correct
32 Correct 20 ms 28908 KB Output is correct
33 Correct 18 ms 28524 KB Output is correct
34 Correct 19 ms 28780 KB Output is correct
35 Correct 20 ms 28780 KB Output is correct
36 Correct 20 ms 28780 KB Output is correct
37 Correct 20 ms 28780 KB Output is correct
38 Correct 18 ms 28524 KB Output is correct
39 Correct 20 ms 28780 KB Output is correct
40 Correct 20 ms 28780 KB Output is correct
41 Correct 20 ms 28780 KB Output is correct
42 Correct 21 ms 28908 KB Output is correct
43 Correct 20 ms 28908 KB Output is correct
44 Correct 18 ms 28524 KB Output is correct
45 Correct 21 ms 28908 KB Output is correct
46 Correct 20 ms 28780 KB Output is correct
47 Correct 18 ms 28524 KB Output is correct
48 Correct 20 ms 28780 KB Output is correct
49 Correct 23 ms 29088 KB Output is correct
50 Correct 20 ms 29036 KB Output is correct
51 Correct 21 ms 28780 KB Output is correct
52 Correct 19 ms 28780 KB Output is correct
53 Correct 20 ms 28780 KB Output is correct
54 Correct 20 ms 28780 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28524 KB Output is correct
2 Correct 18 ms 28652 KB Output is correct
3 Correct 18 ms 28524 KB Output is correct
4 Correct 18 ms 28524 KB Output is correct
5 Correct 18 ms 28524 KB Output is correct
6 Correct 18 ms 28524 KB Output is correct
7 Correct 18 ms 28524 KB Output is correct
8 Correct 18 ms 28524 KB Output is correct
9 Correct 18 ms 28524 KB Output is correct
10 Correct 20 ms 28652 KB Output is correct
11 Correct 18 ms 28524 KB Output is correct
12 Correct 18 ms 28544 KB Output is correct
13 Correct 18 ms 28524 KB Output is correct
14 Correct 18 ms 28524 KB Output is correct
15 Correct 18 ms 28544 KB Output is correct
16 Correct 18 ms 28524 KB Output is correct
17 Correct 18 ms 28524 KB Output is correct
18 Correct 19 ms 28524 KB Output is correct
19 Correct 18 ms 28524 KB Output is correct
20 Correct 18 ms 28524 KB Output is correct
21 Correct 18 ms 28536 KB Output is correct
22 Correct 18 ms 28524 KB Output is correct
23 Correct 18 ms 28524 KB Output is correct
24 Correct 18 ms 28524 KB Output is correct
25 Correct 20 ms 28524 KB Output is correct
26 Correct 66 ms 34148 KB Output is correct
27 Correct 92 ms 33900 KB Output is correct
28 Correct 19 ms 28780 KB Output is correct
29 Correct 18 ms 28524 KB Output is correct
30 Correct 18 ms 28524 KB Output is correct
31 Correct 85 ms 34028 KB Output is correct
32 Correct 20 ms 28800 KB Output is correct
33 Correct 118 ms 39532 KB Output is correct
34 Correct 88 ms 33900 KB Output is correct
35 Correct 19 ms 28780 KB Output is correct
36 Correct 101 ms 35948 KB Output is correct
37 Correct 20 ms 28780 KB Output is correct
38 Correct 20 ms 28780 KB Output is correct
39 Correct 72 ms 35556 KB Output is correct
40 Correct 20 ms 28908 KB Output is correct
41 Correct 94 ms 35172 KB Output is correct
42 Correct 113 ms 37228 KB Output is correct
43 Correct 18 ms 28524 KB Output is correct
44 Correct 117 ms 41188 KB Output is correct
45 Correct 105 ms 38252 KB Output is correct
46 Correct 20 ms 28800 KB Output is correct
47 Correct 20 ms 28780 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 34276 KB Output is correct
2 Correct 81 ms 37092 KB Output is correct
3 Correct 20 ms 28780 KB Output is correct
4 Correct 20 ms 28780 KB Output is correct
5 Correct 18 ms 28524 KB Output is correct
6 Correct 18 ms 28524 KB Output is correct
7 Correct 19 ms 28780 KB Output is correct
8 Correct 102 ms 35308 KB Output is correct
9 Correct 19 ms 28780 KB Output is correct
10 Correct 94 ms 35820 KB Output is correct
11 Correct 18 ms 28524 KB Output is correct
12 Correct 107 ms 35820 KB Output is correct
13 Correct 117 ms 37100 KB Output is correct
14 Correct 99 ms 38676 KB Output is correct
15 Correct 70 ms 35576 KB Output is correct
16 Correct 20 ms 28908 KB Output is correct
17 Correct 18 ms 28524 KB Output is correct
18 Correct 87 ms 38628 KB Output is correct
19 Correct 115 ms 41708 KB Output is correct
20 Correct 20 ms 28780 KB Output is correct
21 Correct 18 ms 28524 KB Output is correct
22 Correct 81 ms 37220 KB Output is correct
23 Correct 20 ms 28780 KB Output is correct
24 Correct 111 ms 36204 KB Output is correct
25 Correct 115 ms 40668 KB Output is correct
26 Correct 21 ms 28908 KB Output is correct
27 Correct 20 ms 28908 KB Output is correct
28 Correct 20 ms 28780 KB Output is correct
29 Correct 20 ms 28772 KB Output is correct
30 Correct 20 ms 28780 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28524 KB Output is correct
2 Correct 18 ms 28652 KB Output is correct
3 Correct 18 ms 28524 KB Output is correct
4 Correct 18 ms 28524 KB Output is correct
5 Correct 18 ms 28524 KB Output is correct
6 Correct 18 ms 28524 KB Output is correct
7 Correct 18 ms 28524 KB Output is correct
8 Correct 18 ms 28524 KB Output is correct
9 Correct 18 ms 28524 KB Output is correct
10 Correct 20 ms 28652 KB Output is correct
11 Correct 18 ms 28524 KB Output is correct
12 Correct 18 ms 28544 KB Output is correct
13 Correct 18 ms 28524 KB Output is correct
14 Correct 18 ms 28524 KB Output is correct
15 Correct 18 ms 28544 KB Output is correct
16 Correct 18 ms 28524 KB Output is correct
17 Correct 18 ms 28524 KB Output is correct
18 Correct 19 ms 28524 KB Output is correct
19 Correct 18 ms 28524 KB Output is correct
20 Correct 18 ms 28524 KB Output is correct
21 Correct 18 ms 28536 KB Output is correct
22 Correct 18 ms 28524 KB Output is correct
23 Correct 18 ms 28524 KB Output is correct
24 Correct 18 ms 28524 KB Output is correct
25 Correct 18 ms 28524 KB Output is correct
26 Correct 19 ms 28780 KB Output is correct
27 Correct 20 ms 28800 KB Output is correct
28 Correct 20 ms 28908 KB Output is correct
29 Correct 20 ms 28780 KB Output is correct
30 Correct 19 ms 28780 KB Output is correct
31 Correct 18 ms 28524 KB Output is correct
32 Correct 20 ms 28908 KB Output is correct
33 Correct 18 ms 28524 KB Output is correct
34 Correct 19 ms 28780 KB Output is correct
35 Correct 20 ms 28780 KB Output is correct
36 Correct 20 ms 28780 KB Output is correct
37 Correct 20 ms 28780 KB Output is correct
38 Correct 18 ms 28524 KB Output is correct
39 Correct 20 ms 28780 KB Output is correct
40 Correct 20 ms 28780 KB Output is correct
41 Correct 20 ms 28780 KB Output is correct
42 Correct 21 ms 28908 KB Output is correct
43 Correct 20 ms 28908 KB Output is correct
44 Correct 18 ms 28524 KB Output is correct
45 Correct 21 ms 28908 KB Output is correct
46 Correct 20 ms 28780 KB Output is correct
47 Correct 18 ms 28524 KB Output is correct
48 Correct 20 ms 28780 KB Output is correct
49 Correct 23 ms 29088 KB Output is correct
50 Correct 20 ms 29036 KB Output is correct
51 Correct 21 ms 28780 KB Output is correct
52 Correct 19 ms 28780 KB Output is correct
53 Correct 20 ms 28780 KB Output is correct
54 Correct 20 ms 28780 KB Output is correct
55 Correct 20 ms 28524 KB Output is correct
56 Correct 66 ms 34148 KB Output is correct
57 Correct 92 ms 33900 KB Output is correct
58 Correct 19 ms 28780 KB Output is correct
59 Correct 18 ms 28524 KB Output is correct
60 Correct 18 ms 28524 KB Output is correct
61 Correct 85 ms 34028 KB Output is correct
62 Correct 20 ms 28800 KB Output is correct
63 Correct 118 ms 39532 KB Output is correct
64 Correct 88 ms 33900 KB Output is correct
65 Correct 19 ms 28780 KB Output is correct
66 Correct 101 ms 35948 KB Output is correct
67 Correct 20 ms 28780 KB Output is correct
68 Correct 20 ms 28780 KB Output is correct
69 Correct 72 ms 35556 KB Output is correct
70 Correct 20 ms 28908 KB Output is correct
71 Correct 94 ms 35172 KB Output is correct
72 Correct 113 ms 37228 KB Output is correct
73 Correct 18 ms 28524 KB Output is correct
74 Correct 117 ms 41188 KB Output is correct
75 Correct 105 ms 38252 KB Output is correct
76 Correct 20 ms 28800 KB Output is correct
77 Correct 20 ms 28780 KB Output is correct
78 Correct 67 ms 34276 KB Output is correct
79 Correct 81 ms 37092 KB Output is correct
80 Correct 20 ms 28780 KB Output is correct
81 Correct 20 ms 28780 KB Output is correct
82 Correct 18 ms 28524 KB Output is correct
83 Correct 18 ms 28524 KB Output is correct
84 Correct 19 ms 28780 KB Output is correct
85 Correct 102 ms 35308 KB Output is correct
86 Correct 19 ms 28780 KB Output is correct
87 Correct 94 ms 35820 KB Output is correct
88 Correct 18 ms 28524 KB Output is correct
89 Correct 107 ms 35820 KB Output is correct
90 Correct 117 ms 37100 KB Output is correct
91 Correct 99 ms 38676 KB Output is correct
92 Correct 70 ms 35576 KB Output is correct
93 Correct 20 ms 28908 KB Output is correct
94 Correct 18 ms 28524 KB Output is correct
95 Correct 87 ms 38628 KB Output is correct
96 Correct 115 ms 41708 KB Output is correct
97 Correct 20 ms 28780 KB Output is correct
98 Correct 18 ms 28524 KB Output is correct
99 Correct 81 ms 37220 KB Output is correct
100 Correct 20 ms 28780 KB Output is correct
101 Correct 111 ms 36204 KB Output is correct
102 Correct 115 ms 40668 KB Output is correct
103 Correct 21 ms 28908 KB Output is correct
104 Correct 20 ms 28908 KB Output is correct
105 Correct 20 ms 28780 KB Output is correct
106 Correct 20 ms 28772 KB Output is correct
107 Correct 20 ms 28780 KB Output is correct
108 Correct 516 ms 72284 KB Output is correct
109 Correct 699 ms 76676 KB Output is correct
110 Correct 735 ms 85724 KB Output is correct
111 Correct 810 ms 98540 KB Output is correct
112 Correct 799 ms 90860 KB Output is correct
113 Correct 514 ms 80084 KB Output is correct
114 Correct 581 ms 62472 KB Output is correct
115 Correct 578 ms 62560 KB Output is correct
116 Correct 696 ms 68716 KB Output is correct
117 Correct 716 ms 80236 KB Output is correct
118 Correct 611 ms 65132 KB Output is correct
119 Correct 721 ms 80364 KB Output is correct
120 Correct 752 ms 91372 KB Output is correct
121 Correct 730 ms 80264 KB Output is correct
122 Correct 765 ms 73836 KB Output is correct
123 Correct 513 ms 81756 KB Output is correct
124 Correct 794 ms 78828 KB Output is correct