답안 #227202

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
227202	2020-04-26T13:39:26 Z	MKopchev	Mergers (JOI19_mergers)	C++14	100 / 100	1176 ms	75176 KB

mergers

#include <bits/stdc++.h>
using namespace std;

const int nmax=5e5+42;

int n,k;

int colour[nmax],cnt[nmax];

vector<int> adj[nmax];

int wrong=0;

int seen[nmax];

void add(int val)
{
    val=colour[val];

    if(seen[val]==0)wrong++;
    seen[val]++;
    if(seen[val]==cnt[val])wrong--;
}

void sub(int val)
{
    val=colour[val];

    if(seen[val]==cnt[val])wrong++;
    seen[val]--;
    if(seen[val]==0)wrong--;
}

int SZ[nmax];

void dfs_sz(int node,int par)
{
    SZ[node]=1;
    for(auto k:adj[node])
        if(k!=par)
        {
            dfs_sz(k,node);
            SZ[node]+=SZ[k];
        }
}

int can_divide=0;

void dfs_clean(int node,int par)
{
    sub(node);

    for(auto k:adj[node])
        if(k!=par)
        {
            dfs_clean(k,node);
        }
}

void dfs_add(int node,int par)
{
    add(node);

    for(auto k:adj[node])
        if(k!=par)
        {
            dfs_add(k,node);
        }
}

int ROOT;
int dfs(int node,int par)
{
    int found=0;

    int big=0;

    for(auto k:adj[node])
        if(k!=par&&SZ[big]<SZ[k])big=k;

    for(auto k:adj[node])
        if(k!=par&&big!=k)
        {
            found=dfs(k,node)+found;

            dfs_clean(k,node);
        }
    /*
    cout<<node<<" -> "<<big<<" "<<found<<" "<<wrong<<endl;

    cout<<"seen(should be empty): ";for(int i=1;i<=k;i++)cout<<seen[i]<<" ";cout<<endl;
    */
    if(big)found=found+dfs(big,node);


    for(auto k:adj[node])
        if(k!=par&&big!=k)
            dfs_add(k,node);

    add(node);

    //cout<<node<<" -> "<<big<<" "<<found<<" "<<wrong<<endl;

    //cout<<"seen: ";for(int i=1;i<=k;i++)cout<<seen[i]<<" ";cout<<endl;

    if(wrong==0)
    {
        if(node!=ROOT)found++;

        if(found==1)can_divide++;

        return 1;
    }

    return found;
}
int main()
{
    scanf("%i%i",&n,&k);

    int u,v;
    for(int i=1;i<n;i++)
    {
        scanf("%i%i",&u,&v);
        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    for(int i=1;i<=n;i++)
    {
        scanf("%i",&colour[i]);
        cnt[colour[i]]++;
    }

    ROOT=1;

    dfs_sz(ROOT,0);

    dfs(ROOT,0);

    printf("%i\n",(can_divide+1)/2);

    return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:119:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i",&n,&k);
     ~~~~~^~~~~~~~~~~~~~
mergers.cpp:124:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i%i",&u,&v);
         ~~~~~^~~~~~~~~~~~~~
mergers.cpp:131:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i",&colour[i]);
         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	12032 KB	Output is correct
2	Correct	11 ms	12032 KB	Output is correct
3	Correct	11 ms	12160 KB	Output is correct
4	Correct	11 ms	12160 KB	Output is correct
5	Correct	11 ms	12016 KB	Output is correct
6	Correct	13 ms	12160 KB	Output is correct
7	Correct	11 ms	12032 KB	Output is correct
8	Correct	11 ms	12160 KB	Output is correct
9	Correct	11 ms	12032 KB	Output is correct
10	Correct	11 ms	12032 KB	Output is correct
11	Correct	11 ms	12032 KB	Output is correct
12	Correct	11 ms	12160 KB	Output is correct
13	Correct	11 ms	12032 KB	Output is correct
14	Correct	11 ms	12160 KB	Output is correct
15	Correct	11 ms	12032 KB	Output is correct
16	Correct	11 ms	12032 KB	Output is correct
17	Correct	11 ms	12160 KB	Output is correct
18	Correct	11 ms	12032 KB	Output is correct
19	Correct	11 ms	12032 KB	Output is correct
20	Correct	11 ms	12032 KB	Output is correct
21	Correct	11 ms	12032 KB	Output is correct
22	Correct	11 ms	12032 KB	Output is correct
23	Correct	10 ms	12032 KB	Output is correct
24	Correct	11 ms	12160 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	12032 KB	Output is correct
2	Correct	11 ms	12032 KB	Output is correct
3	Correct	11 ms	12160 KB	Output is correct
4	Correct	11 ms	12160 KB	Output is correct
5	Correct	11 ms	12016 KB	Output is correct
6	Correct	13 ms	12160 KB	Output is correct
7	Correct	11 ms	12032 KB	Output is correct
8	Correct	11 ms	12160 KB	Output is correct
9	Correct	11 ms	12032 KB	Output is correct
10	Correct	11 ms	12032 KB	Output is correct
11	Correct	11 ms	12032 KB	Output is correct
12	Correct	11 ms	12160 KB	Output is correct
13	Correct	11 ms	12032 KB	Output is correct
14	Correct	11 ms	12160 KB	Output is correct
15	Correct	11 ms	12032 KB	Output is correct
16	Correct	11 ms	12032 KB	Output is correct
17	Correct	11 ms	12160 KB	Output is correct
18	Correct	11 ms	12032 KB	Output is correct
19	Correct	11 ms	12032 KB	Output is correct
20	Correct	11 ms	12032 KB	Output is correct
21	Correct	11 ms	12032 KB	Output is correct
22	Correct	11 ms	12032 KB	Output is correct
23	Correct	10 ms	12032 KB	Output is correct
24	Correct	11 ms	12160 KB	Output is correct
25	Correct	11 ms	12160 KB	Output is correct
26	Correct	13 ms	12288 KB	Output is correct
27	Correct	13 ms	12160 KB	Output is correct
28	Correct	13 ms	12416 KB	Output is correct
29	Correct	13 ms	12160 KB	Output is correct
30	Correct	13 ms	12160 KB	Output is correct
31	Correct	11 ms	12032 KB	Output is correct
32	Correct	13 ms	12416 KB	Output is correct
33	Correct	11 ms	12032 KB	Output is correct
34	Correct	12 ms	12160 KB	Output is correct
35	Correct	13 ms	12288 KB	Output is correct
36	Correct	13 ms	12288 KB	Output is correct
37	Correct	13 ms	12288 KB	Output is correct
38	Correct	14 ms	12032 KB	Output is correct
39	Correct	13 ms	12288 KB	Output is correct
40	Correct	13 ms	12288 KB	Output is correct
41	Correct	13 ms	12212 KB	Output is correct
42	Correct	12 ms	12288 KB	Output is correct
43	Correct	13 ms	12544 KB	Output is correct
44	Correct	11 ms	12160 KB	Output is correct
45	Correct	13 ms	12288 KB	Output is correct
46	Correct	13 ms	12288 KB	Output is correct
47	Correct	11 ms	12032 KB	Output is correct
48	Correct	13 ms	12288 KB	Output is correct
49	Correct	12 ms	12288 KB	Output is correct
50	Correct	13 ms	12288 KB	Output is correct
51	Correct	13 ms	12288 KB	Output is correct
52	Correct	12 ms	12416 KB	Output is correct
53	Correct	12 ms	12288 KB	Output is correct
54	Correct	13 ms	12288 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	12032 KB	Output is correct
2	Correct	11 ms	12032 KB	Output is correct
3	Correct	11 ms	12160 KB	Output is correct
4	Correct	11 ms	12160 KB	Output is correct
5	Correct	11 ms	12016 KB	Output is correct
6	Correct	13 ms	12160 KB	Output is correct
7	Correct	11 ms	12032 KB	Output is correct
8	Correct	11 ms	12160 KB	Output is correct
9	Correct	11 ms	12032 KB	Output is correct
10	Correct	11 ms	12032 KB	Output is correct
11	Correct	11 ms	12032 KB	Output is correct
12	Correct	11 ms	12160 KB	Output is correct
13	Correct	11 ms	12032 KB	Output is correct
14	Correct	11 ms	12160 KB	Output is correct
15	Correct	11 ms	12032 KB	Output is correct
16	Correct	11 ms	12032 KB	Output is correct
17	Correct	11 ms	12160 KB	Output is correct
18	Correct	11 ms	12032 KB	Output is correct
19	Correct	11 ms	12032 KB	Output is correct
20	Correct	11 ms	12032 KB	Output is correct
21	Correct	11 ms	12032 KB	Output is correct
22	Correct	11 ms	12032 KB	Output is correct
23	Correct	10 ms	12032 KB	Output is correct
24	Correct	11 ms	12160 KB	Output is correct
25	Correct	11 ms	12160 KB	Output is correct
26	Correct	65 ms	16372 KB	Output is correct
27	Correct	112 ms	16120 KB	Output is correct
28	Correct	13 ms	12160 KB	Output is correct
29	Correct	11 ms	12032 KB	Output is correct
30	Correct	11 ms	12160 KB	Output is correct
31	Correct	117 ms	16120 KB	Output is correct
32	Correct	12 ms	12160 KB	Output is correct
33	Correct	103 ms	24696 KB	Output is correct
34	Correct	112 ms	16120 KB	Output is correct
35	Correct	13 ms	12288 KB	Output is correct
36	Correct	113 ms	18424 KB	Output is correct
37	Correct	13 ms	12288 KB	Output is correct
38	Correct	13 ms	12288 KB	Output is correct
39	Correct	67 ms	17776 KB	Output is correct
40	Correct	13 ms	12544 KB	Output is correct
41	Correct	119 ms	17528 KB	Output is correct
42	Correct	112 ms	20344 KB	Output is correct
43	Correct	11 ms	12160 KB	Output is correct
44	Correct	104 ms	26580 KB	Output is correct
45	Correct	96 ms	22008 KB	Output is correct
46	Correct	12 ms	12288 KB	Output is correct
47	Correct	13 ms	12288 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	65 ms	16368 KB	Output is correct
2	Correct	75 ms	17396 KB	Output is correct
3	Correct	13 ms	12288 KB	Output is correct
4	Correct	13 ms	12160 KB	Output is correct
5	Correct	14 ms	12140 KB	Output is correct
6	Correct	11 ms	12032 KB	Output is correct
7	Correct	12 ms	12160 KB	Output is correct
8	Correct	122 ms	16548 KB	Output is correct
9	Correct	13 ms	12264 KB	Output is correct
10	Correct	122 ms	17656 KB	Output is correct
11	Correct	11 ms	12160 KB	Output is correct
12	Correct	128 ms	17656 KB	Output is correct
13	Correct	135 ms	18168 KB	Output is correct
14	Correct	127 ms	18680 KB	Output is correct
15	Correct	75 ms	17964 KB	Output is correct
16	Correct	12 ms	12288 KB	Output is correct
17	Correct	11 ms	12032 KB	Output is correct
18	Correct	72 ms	18800 KB	Output is correct
19	Correct	124 ms	23288 KB	Output is correct
20	Correct	13 ms	12288 KB	Output is correct
21	Correct	11 ms	12032 KB	Output is correct
22	Correct	74 ms	18540 KB	Output is correct
23	Correct	14 ms	12288 KB	Output is correct
24	Correct	137 ms	17784 KB	Output is correct
25	Correct	107 ms	21752 KB	Output is correct
26	Correct	13 ms	12288 KB	Output is correct
27	Correct	13 ms	12288 KB	Output is correct
28	Correct	13 ms	12288 KB	Output is correct
29	Correct	12 ms	12288 KB	Output is correct
30	Correct	13 ms	12288 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	12032 KB	Output is correct
2	Correct	11 ms	12032 KB	Output is correct
3	Correct	11 ms	12160 KB	Output is correct
4	Correct	11 ms	12160 KB	Output is correct
5	Correct	11 ms	12016 KB	Output is correct
6	Correct	13 ms	12160 KB	Output is correct
7	Correct	11 ms	12032 KB	Output is correct
8	Correct	11 ms	12160 KB	Output is correct
9	Correct	11 ms	12032 KB	Output is correct
10	Correct	11 ms	12032 KB	Output is correct
11	Correct	11 ms	12032 KB	Output is correct
12	Correct	11 ms	12160 KB	Output is correct
13	Correct	11 ms	12032 KB	Output is correct
14	Correct	11 ms	12160 KB	Output is correct
15	Correct	11 ms	12032 KB	Output is correct
16	Correct	11 ms	12032 KB	Output is correct
17	Correct	11 ms	12160 KB	Output is correct
18	Correct	11 ms	12032 KB	Output is correct
19	Correct	11 ms	12032 KB	Output is correct
20	Correct	11 ms	12032 KB	Output is correct
21	Correct	11 ms	12032 KB	Output is correct
22	Correct	11 ms	12032 KB	Output is correct
23	Correct	10 ms	12032 KB	Output is correct
24	Correct	11 ms	12160 KB	Output is correct
25	Correct	11 ms	12160 KB	Output is correct
26	Correct	13 ms	12288 KB	Output is correct
27	Correct	13 ms	12160 KB	Output is correct
28	Correct	13 ms	12416 KB	Output is correct
29	Correct	13 ms	12160 KB	Output is correct
30	Correct	13 ms	12160 KB	Output is correct
31	Correct	11 ms	12032 KB	Output is correct
32	Correct	13 ms	12416 KB	Output is correct
33	Correct	11 ms	12032 KB	Output is correct
34	Correct	12 ms	12160 KB	Output is correct
35	Correct	13 ms	12288 KB	Output is correct
36	Correct	13 ms	12288 KB	Output is correct
37	Correct	13 ms	12288 KB	Output is correct
38	Correct	14 ms	12032 KB	Output is correct
39	Correct	13 ms	12288 KB	Output is correct
40	Correct	13 ms	12288 KB	Output is correct
41	Correct	13 ms	12212 KB	Output is correct
42	Correct	12 ms	12288 KB	Output is correct
43	Correct	13 ms	12544 KB	Output is correct
44	Correct	11 ms	12160 KB	Output is correct
45	Correct	13 ms	12288 KB	Output is correct
46	Correct	13 ms	12288 KB	Output is correct
47	Correct	11 ms	12032 KB	Output is correct
48	Correct	13 ms	12288 KB	Output is correct
49	Correct	12 ms	12288 KB	Output is correct
50	Correct	13 ms	12288 KB	Output is correct
51	Correct	13 ms	12288 KB	Output is correct
52	Correct	12 ms	12416 KB	Output is correct
53	Correct	12 ms	12288 KB	Output is correct
54	Correct	13 ms	12288 KB	Output is correct
55	Correct	11 ms	12160 KB	Output is correct
56	Correct	65 ms	16372 KB	Output is correct
57	Correct	112 ms	16120 KB	Output is correct
58	Correct	13 ms	12160 KB	Output is correct
59	Correct	11 ms	12032 KB	Output is correct
60	Correct	11 ms	12160 KB	Output is correct
61	Correct	117 ms	16120 KB	Output is correct
62	Correct	12 ms	12160 KB	Output is correct
63	Correct	103 ms	24696 KB	Output is correct
64	Correct	112 ms	16120 KB	Output is correct
65	Correct	13 ms	12288 KB	Output is correct
66	Correct	113 ms	18424 KB	Output is correct
67	Correct	13 ms	12288 KB	Output is correct
68	Correct	13 ms	12288 KB	Output is correct
69	Correct	67 ms	17776 KB	Output is correct
70	Correct	13 ms	12544 KB	Output is correct
71	Correct	119 ms	17528 KB	Output is correct
72	Correct	112 ms	20344 KB	Output is correct
73	Correct	11 ms	12160 KB	Output is correct
74	Correct	104 ms	26580 KB	Output is correct
75	Correct	96 ms	22008 KB	Output is correct
76	Correct	12 ms	12288 KB	Output is correct
77	Correct	13 ms	12288 KB	Output is correct
78	Correct	65 ms	16368 KB	Output is correct
79	Correct	75 ms	17396 KB	Output is correct
80	Correct	13 ms	12288 KB	Output is correct
81	Correct	13 ms	12160 KB	Output is correct
82	Correct	14 ms	12140 KB	Output is correct
83	Correct	11 ms	12032 KB	Output is correct
84	Correct	12 ms	12160 KB	Output is correct
85	Correct	122 ms	16548 KB	Output is correct
86	Correct	13 ms	12264 KB	Output is correct
87	Correct	122 ms	17656 KB	Output is correct
88	Correct	11 ms	12160 KB	Output is correct
89	Correct	128 ms	17656 KB	Output is correct
90	Correct	135 ms	18168 KB	Output is correct
91	Correct	127 ms	18680 KB	Output is correct
92	Correct	75 ms	17964 KB	Output is correct
93	Correct	12 ms	12288 KB	Output is correct
94	Correct	11 ms	12032 KB	Output is correct
95	Correct	72 ms	18800 KB	Output is correct
96	Correct	124 ms	23288 KB	Output is correct
97	Correct	13 ms	12288 KB	Output is correct
98	Correct	11 ms	12032 KB	Output is correct
99	Correct	74 ms	18540 KB	Output is correct
100	Correct	14 ms	12288 KB	Output is correct
101	Correct	137 ms	17784 KB	Output is correct
102	Correct	107 ms	21752 KB	Output is correct
103	Correct	13 ms	12288 KB	Output is correct
104	Correct	13 ms	12288 KB	Output is correct
105	Correct	13 ms	12288 KB	Output is correct
106	Correct	12 ms	12288 KB	Output is correct
107	Correct	13 ms	12288 KB	Output is correct
108	Correct	430 ms	45028 KB	Output is correct
109	Correct	892 ms	61560 KB	Output is correct
110	Correct	829 ms	75176 KB	Output is correct
111	Correct	890 ms	73976 KB	Output is correct
112	Correct	817 ms	62200 KB	Output is correct
113	Correct	458 ms	47196 KB	Output is correct
114	Correct	912 ms	39800 KB	Output is correct
115	Correct	897 ms	39928 KB	Output is correct
116	Correct	987 ms	42616 KB	Output is correct
117	Correct	1030 ms	46200 KB	Output is correct
118	Correct	889 ms	40312 KB	Output is correct
119	Correct	997 ms	46264 KB	Output is correct
120	Correct	798 ms	62896 KB	Output is correct
121	Correct	980 ms	46200 KB	Output is correct
122	Correct	1016 ms	44408 KB	Output is correct
123	Correct	447 ms	47588 KB	Output is correct
124	Correct	1176 ms	45432 KB	Output is correct

답안 #227202

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