Submission #114577

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
114577	2019-06-01T20:40:52 Z	tincamatei	Mergers (JOI19_mergers)	C++14	100 / 100	1620 ms	85228 KB

mergers

#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 500000;
const int MAX_K = MAX_N;

vector<int> graph[1+MAX_N];
int color[1+MAX_N], fr[1+MAX_K], subarb[1+MAX_K];
int criticalsubarb[1+MAX_N];
int nrleaves, criticalEdges;
bool intree[1+MAX_N];

void dfs(int nod, int papa = 0) {
	subarb[nod] = 1;
	for(auto it: graph[nod])
		if(it != papa) {
			dfs(it, nod);
			subarb[nod] += subarb[it];
		}
}

struct CriticalEdgeChecker {
	vector<int> nodehistory;
	int freq[1+MAX_K], fullsides, K;

	CriticalEdgeChecker(int _K):K(_K) {
		fullsides = K;
		for(int i = 0; i <= MAX_K; ++i)
			freq[i] = 0;
	}

	void insert(int nod) {
		if(freq[color[nod]] == 0)
			fullsides--;
		freq[color[nod]]++;
		if(freq[color[nod]] == fr[color[nod]])
			++fullsides;
		nodehistory.push_back(nod);
	}
	
	void erase(int nod) {
		if(freq[color[nod]] == fr[color[nod]])
			--fullsides;
		freq[color[nod]]--;
		if(freq[color[nod]] == 0)
			++fullsides;
	}

	void clear() {
		for(auto it: nodehistory)
			erase(it);
		nodehistory.clear();
	}

	bool isCritical() {
		return fullsides == K;
	}
} *criticalEdge;

void pourDfs(int nod, int papa = 0) {
	criticalEdge->insert(nod);
	for(auto it: graph[nod])
		if(it != papa)
			pourDfs(it, nod);
}

void heavyDfs(int nod, int papa = 0) {
	int heavySon = -1;
	for(auto it: graph[nod])
		if(it != papa && (heavySon == -1 || (heavySon != -1 && subarb[it] > subarb[heavySon])))
			heavySon = it;

	if(heavySon != -1) {
		for(auto it: graph[nod])
			if(it != papa && it != heavySon) {
				criticalEdge->clear();
				heavyDfs(it, nod);
				if(criticalEdge->isCritical()) {
					criticalsubarb[nod]++;
					criticalEdges++;
					intree[it] = true;
				}
			}

		criticalEdge->clear();
		heavyDfs(heavySon, nod);
		if(criticalEdge->isCritical()) {
			criticalsubarb[nod]++;
			criticalEdges++;
			intree[heavySon] = true;
		}
		
		for(auto it: graph[nod])
			if(it != papa && it != heavySon)
				pourDfs(it, nod);
	}
	criticalEdge->insert(nod);
}

int buildTree(int nod, int papa = 0) {
	int degree = (papa != 0); // degree from above
	for(auto it: graph[nod])
		if(it != papa)
			degree += buildTree(it, nod);

	if(intree[nod]) {
		if(degree == 1)
			++nrleaves;
		return 1;
	} else
		return degree - (papa != 0);
}

int main() {
	int N, K;
	scanf("%d%d", &N, &K);
	criticalEdge = new CriticalEdgeChecker(K);

	for(int i = 0; i < N - 1; ++i) {
		int a, b;
		scanf("%d%d", &a, &b);
		graph[a].push_back(b);
		graph[b].push_back(a);
	}

	for(int i = 1; i <= N; ++i) {
		scanf("%d", &color[i]);
		fr[color[i]]++;
	}

	dfs(1);
	heavyDfs(1);
	
	intree[1] = true;
	buildTree(1);

	printf("%d", (nrleaves + 1) / 2);

	return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:117:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &K);
  ~~~~~^~~~~~~~~~~~~~~~
mergers.cpp:122:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~
mergers.cpp:128:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &color[i]);
   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	13 ms	14080 KB	Output is correct
2	Correct	13 ms	14080 KB	Output is correct
3	Correct	13 ms	14124 KB	Output is correct
4	Correct	13 ms	14052 KB	Output is correct
5	Correct	13 ms	14080 KB	Output is correct
6	Correct	14 ms	14080 KB	Output is correct
7	Correct	16 ms	14080 KB	Output is correct
8	Correct	13 ms	14080 KB	Output is correct
9	Correct	13 ms	14080 KB	Output is correct
10	Correct	13 ms	14080 KB	Output is correct
11	Correct	16 ms	14080 KB	Output is correct
12	Correct	13 ms	14080 KB	Output is correct
13	Correct	13 ms	14080 KB	Output is correct
14	Correct	13 ms	14052 KB	Output is correct
15	Correct	14 ms	14080 KB	Output is correct
16	Correct	13 ms	14080 KB	Output is correct
17	Correct	12 ms	14052 KB	Output is correct
18	Correct	12 ms	14080 KB	Output is correct
19	Correct	12 ms	14080 KB	Output is correct
20	Correct	14 ms	14080 KB	Output is correct
21	Correct	14 ms	14080 KB	Output is correct
22	Correct	13 ms	14080 KB	Output is correct
23	Correct	13 ms	14080 KB	Output is correct
24	Correct	13 ms	14080 KB	Output is correct

Subtask #2
24.0 / 24.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	13 ms	14080 KB	Output is correct
2	Correct	13 ms	14080 KB	Output is correct
3	Correct	13 ms	14124 KB	Output is correct
4	Correct	13 ms	14052 KB	Output is correct
5	Correct	13 ms	14080 KB	Output is correct
6	Correct	14 ms	14080 KB	Output is correct
7	Correct	16 ms	14080 KB	Output is correct
8	Correct	13 ms	14080 KB	Output is correct
9	Correct	13 ms	14080 KB	Output is correct
10	Correct	13 ms	14080 KB	Output is correct
11	Correct	16 ms	14080 KB	Output is correct
12	Correct	13 ms	14080 KB	Output is correct
13	Correct	13 ms	14080 KB	Output is correct
14	Correct	13 ms	14052 KB	Output is correct
15	Correct	14 ms	14080 KB	Output is correct
16	Correct	13 ms	14080 KB	Output is correct
17	Correct	12 ms	14052 KB	Output is correct
18	Correct	12 ms	14080 KB	Output is correct
19	Correct	12 ms	14080 KB	Output is correct
20	Correct	14 ms	14080 KB	Output is correct
21	Correct	14 ms	14080 KB	Output is correct
22	Correct	13 ms	14080 KB	Output is correct
23	Correct	13 ms	14080 KB	Output is correct
24	Correct	13 ms	14080 KB	Output is correct
25	Correct	13 ms	14080 KB	Output is correct
26	Correct	16 ms	14324 KB	Output is correct
27	Correct	15 ms	14336 KB	Output is correct
28	Correct	16 ms	14336 KB	Output is correct
29	Correct	15 ms	14208 KB	Output is correct
30	Correct	15 ms	14208 KB	Output is correct
31	Correct	13 ms	14080 KB	Output is correct
32	Correct	15 ms	14464 KB	Output is correct
33	Correct	13 ms	14080 KB	Output is correct
34	Correct	14 ms	14208 KB	Output is correct
35	Correct	15 ms	14208 KB	Output is correct
36	Correct	15 ms	14252 KB	Output is correct
37	Correct	16 ms	14208 KB	Output is correct
38	Correct	14 ms	14076 KB	Output is correct
39	Correct	15 ms	14208 KB	Output is correct
40	Correct	14 ms	14208 KB	Output is correct
41	Correct	15 ms	14208 KB	Output is correct
42	Correct	15 ms	14208 KB	Output is correct
43	Correct	15 ms	14464 KB	Output is correct
44	Correct	13 ms	14080 KB	Output is correct
45	Correct	14 ms	14336 KB	Output is correct
46	Correct	15 ms	14208 KB	Output is correct
47	Correct	13 ms	14080 KB	Output is correct
48	Correct	15 ms	14208 KB	Output is correct
49	Correct	15 ms	14208 KB	Output is correct
50	Correct	15 ms	14336 KB	Output is correct
51	Correct	16 ms	14208 KB	Output is correct
52	Correct	14 ms	14208 KB	Output is correct
53	Correct	15 ms	14208 KB	Output is correct
54	Correct	15 ms	14208 KB	Output is correct

Subtask #3
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	13 ms	14080 KB	Output is correct
2	Correct	13 ms	14080 KB	Output is correct
3	Correct	13 ms	14124 KB	Output is correct
4	Correct	13 ms	14052 KB	Output is correct
5	Correct	13 ms	14080 KB	Output is correct
6	Correct	14 ms	14080 KB	Output is correct
7	Correct	16 ms	14080 KB	Output is correct
8	Correct	13 ms	14080 KB	Output is correct
9	Correct	13 ms	14080 KB	Output is correct
10	Correct	13 ms	14080 KB	Output is correct
11	Correct	16 ms	14080 KB	Output is correct
12	Correct	13 ms	14080 KB	Output is correct
13	Correct	13 ms	14080 KB	Output is correct
14	Correct	13 ms	14052 KB	Output is correct
15	Correct	14 ms	14080 KB	Output is correct
16	Correct	13 ms	14080 KB	Output is correct
17	Correct	12 ms	14052 KB	Output is correct
18	Correct	12 ms	14080 KB	Output is correct
19	Correct	12 ms	14080 KB	Output is correct
20	Correct	14 ms	14080 KB	Output is correct
21	Correct	14 ms	14080 KB	Output is correct
22	Correct	13 ms	14080 KB	Output is correct
23	Correct	13 ms	14080 KB	Output is correct
24	Correct	13 ms	14080 KB	Output is correct
25	Correct	12 ms	14080 KB	Output is correct
26	Correct	81 ms	19184 KB	Output is correct
27	Correct	235 ms	18736 KB	Output is correct
28	Correct	15 ms	14336 KB	Output is correct
29	Correct	15 ms	14080 KB	Output is correct
30	Correct	14 ms	14052 KB	Output is correct
31	Correct	152 ms	18936 KB	Output is correct
32	Correct	15 ms	14208 KB	Output is correct
33	Correct	180 ms	28756 KB	Output is correct
34	Correct	163 ms	18680 KB	Output is correct
35	Correct	15 ms	14208 KB	Output is correct
36	Correct	186 ms	19960 KB	Output is correct
37	Correct	18 ms	14208 KB	Output is correct
38	Correct	15 ms	14208 KB	Output is correct
39	Correct	75 ms	18936 KB	Output is correct
40	Correct	41 ms	14588 KB	Output is correct
41	Correct	141 ms	18776 KB	Output is correct
42	Correct	164 ms	22072 KB	Output is correct
43	Correct	13 ms	14208 KB	Output is correct
44	Correct	176 ms	29304 KB	Output is correct
45	Correct	135 ms	23928 KB	Output is correct
46	Correct	14 ms	14208 KB	Output is correct
47	Correct	21 ms	14208 KB	Output is correct

Subtask #4
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	76 ms	19200 KB	Output is correct
2	Correct	84 ms	19668 KB	Output is correct
3	Correct	15 ms	14208 KB	Output is correct
4	Correct	15 ms	14208 KB	Output is correct
5	Correct	13 ms	14080 KB	Output is correct
6	Correct	13 ms	14080 KB	Output is correct
7	Correct	14 ms	14208 KB	Output is correct
8	Correct	141 ms	19528 KB	Output is correct
9	Correct	15 ms	14208 KB	Output is correct
10	Correct	129 ms	19224 KB	Output is correct
11	Correct	13 ms	14080 KB	Output is correct
12	Correct	182 ms	19192 KB	Output is correct
13	Correct	164 ms	19444 KB	Output is correct
14	Correct	144 ms	19704 KB	Output is correct
15	Correct	68 ms	18968 KB	Output is correct
16	Correct	15 ms	14208 KB	Output is correct
17	Correct	13 ms	14080 KB	Output is correct
18	Correct	76 ms	19440 KB	Output is correct
19	Correct	141 ms	25084 KB	Output is correct
20	Correct	15 ms	14252 KB	Output is correct
21	Correct	12 ms	14080 KB	Output is correct
22	Correct	77 ms	19412 KB	Output is correct
23	Correct	14 ms	14208 KB	Output is correct
24	Correct	144 ms	19192 KB	Output is correct
25	Correct	129 ms	23288 KB	Output is correct
26	Correct	15 ms	14208 KB	Output is correct
27	Correct	19 ms	14336 KB	Output is correct
28	Correct	15 ms	14248 KB	Output is correct
29	Correct	14 ms	14208 KB	Output is correct
30	Correct	15 ms	14208 KB	Output is correct

Subtask #5
30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	13 ms	14080 KB	Output is correct
2	Correct	13 ms	14080 KB	Output is correct
3	Correct	13 ms	14124 KB	Output is correct
4	Correct	13 ms	14052 KB	Output is correct
5	Correct	13 ms	14080 KB	Output is correct
6	Correct	14 ms	14080 KB	Output is correct
7	Correct	16 ms	14080 KB	Output is correct
8	Correct	13 ms	14080 KB	Output is correct
9	Correct	13 ms	14080 KB	Output is correct
10	Correct	13 ms	14080 KB	Output is correct
11	Correct	16 ms	14080 KB	Output is correct
12	Correct	13 ms	14080 KB	Output is correct
13	Correct	13 ms	14080 KB	Output is correct
14	Correct	13 ms	14052 KB	Output is correct
15	Correct	14 ms	14080 KB	Output is correct
16	Correct	13 ms	14080 KB	Output is correct
17	Correct	12 ms	14052 KB	Output is correct
18	Correct	12 ms	14080 KB	Output is correct
19	Correct	12 ms	14080 KB	Output is correct
20	Correct	14 ms	14080 KB	Output is correct
21	Correct	14 ms	14080 KB	Output is correct
22	Correct	13 ms	14080 KB	Output is correct
23	Correct	13 ms	14080 KB	Output is correct
24	Correct	13 ms	14080 KB	Output is correct
25	Correct	13 ms	14080 KB	Output is correct
26	Correct	16 ms	14324 KB	Output is correct
27	Correct	15 ms	14336 KB	Output is correct
28	Correct	16 ms	14336 KB	Output is correct
29	Correct	15 ms	14208 KB	Output is correct
30	Correct	15 ms	14208 KB	Output is correct
31	Correct	13 ms	14080 KB	Output is correct
32	Correct	15 ms	14464 KB	Output is correct
33	Correct	13 ms	14080 KB	Output is correct
34	Correct	14 ms	14208 KB	Output is correct
35	Correct	15 ms	14208 KB	Output is correct
36	Correct	15 ms	14252 KB	Output is correct
37	Correct	16 ms	14208 KB	Output is correct
38	Correct	14 ms	14076 KB	Output is correct
39	Correct	15 ms	14208 KB	Output is correct
40	Correct	14 ms	14208 KB	Output is correct
41	Correct	15 ms	14208 KB	Output is correct
42	Correct	15 ms	14208 KB	Output is correct
43	Correct	15 ms	14464 KB	Output is correct
44	Correct	13 ms	14080 KB	Output is correct
45	Correct	14 ms	14336 KB	Output is correct
46	Correct	15 ms	14208 KB	Output is correct
47	Correct	13 ms	14080 KB	Output is correct
48	Correct	15 ms	14208 KB	Output is correct
49	Correct	15 ms	14208 KB	Output is correct
50	Correct	15 ms	14336 KB	Output is correct
51	Correct	16 ms	14208 KB	Output is correct
52	Correct	14 ms	14208 KB	Output is correct
53	Correct	15 ms	14208 KB	Output is correct
54	Correct	15 ms	14208 KB	Output is correct
55	Correct	12 ms	14080 KB	Output is correct
56	Correct	81 ms	19184 KB	Output is correct
57	Correct	235 ms	18736 KB	Output is correct
58	Correct	15 ms	14336 KB	Output is correct
59	Correct	15 ms	14080 KB	Output is correct
60	Correct	14 ms	14052 KB	Output is correct
61	Correct	152 ms	18936 KB	Output is correct
62	Correct	15 ms	14208 KB	Output is correct
63	Correct	180 ms	28756 KB	Output is correct
64	Correct	163 ms	18680 KB	Output is correct
65	Correct	15 ms	14208 KB	Output is correct
66	Correct	186 ms	19960 KB	Output is correct
67	Correct	18 ms	14208 KB	Output is correct
68	Correct	15 ms	14208 KB	Output is correct
69	Correct	75 ms	18936 KB	Output is correct
70	Correct	41 ms	14588 KB	Output is correct
71	Correct	141 ms	18776 KB	Output is correct
72	Correct	164 ms	22072 KB	Output is correct
73	Correct	13 ms	14208 KB	Output is correct
74	Correct	176 ms	29304 KB	Output is correct
75	Correct	135 ms	23928 KB	Output is correct
76	Correct	14 ms	14208 KB	Output is correct
77	Correct	21 ms	14208 KB	Output is correct
78	Correct	76 ms	19200 KB	Output is correct
79	Correct	84 ms	19668 KB	Output is correct
80	Correct	15 ms	14208 KB	Output is correct
81	Correct	15 ms	14208 KB	Output is correct
82	Correct	13 ms	14080 KB	Output is correct
83	Correct	13 ms	14080 KB	Output is correct
84	Correct	14 ms	14208 KB	Output is correct
85	Correct	141 ms	19528 KB	Output is correct
86	Correct	15 ms	14208 KB	Output is correct
87	Correct	129 ms	19224 KB	Output is correct
88	Correct	13 ms	14080 KB	Output is correct
89	Correct	182 ms	19192 KB	Output is correct
90	Correct	164 ms	19444 KB	Output is correct
91	Correct	144 ms	19704 KB	Output is correct
92	Correct	68 ms	18968 KB	Output is correct
93	Correct	15 ms	14208 KB	Output is correct
94	Correct	13 ms	14080 KB	Output is correct
95	Correct	76 ms	19440 KB	Output is correct
96	Correct	141 ms	25084 KB	Output is correct
97	Correct	15 ms	14252 KB	Output is correct
98	Correct	12 ms	14080 KB	Output is correct
99	Correct	77 ms	19412 KB	Output is correct
100	Correct	14 ms	14208 KB	Output is correct
101	Correct	144 ms	19192 KB	Output is correct
102	Correct	129 ms	23288 KB	Output is correct
103	Correct	15 ms	14208 KB	Output is correct
104	Correct	19 ms	14336 KB	Output is correct
105	Correct	15 ms	14248 KB	Output is correct
106	Correct	14 ms	14208 KB	Output is correct
107	Correct	15 ms	14208 KB	Output is correct
108	Correct	591 ms	39888 KB	Output is correct
109	Correct	1182 ms	69392 KB	Output is correct
110	Correct	1127 ms	85228 KB	Output is correct
111	Correct	1464 ms	83272 KB	Output is correct
112	Correct	1289 ms	69560 KB	Output is correct
113	Correct	719 ms	50156 KB	Output is correct
114	Correct	1162 ms	44160 KB	Output is correct
115	Correct	1069 ms	44112 KB	Output is correct
116	Correct	1154 ms	48840 KB	Output is correct
117	Correct	1461 ms	50984 KB	Output is correct
118	Correct	1080 ms	46312 KB	Output is correct
119	Correct	1372 ms	50956 KB	Output is correct
120	Correct	1277 ms	70508 KB	Output is correct
121	Correct	1284 ms	50872 KB	Output is correct
122	Correct	1219 ms	50072 KB	Output is correct
123	Correct	616 ms	51152 KB	Output is correct
124	Correct	1620 ms	50232 KB	Output is correct

Submission #114577

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 24.0 / 24.0

Subtask #3 14.0 / 14.0

Subtask #4 22.0 / 22.0

Subtask #5 30.0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
24.0 / 24.0

Subtask #3
14.0 / 14.0

Subtask #4
22.0 / 22.0

Subtask #5
30.0 / 30.0