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답안 #120637

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
120637 2019-06-25T06:41:44 Z 임유진(#2961) Mergers (JOI19_mergers) C++14
100 / 100
 1433 ms 145784 KB 
#include<stdio.h>
#include<queue>
#include<vector>
#include<algorithm>

using namespace std;

#define MAXN 500005

int A[MAXN], B[MAXN], S[MAXN];
vector<int> e[MAXN];
int par[20][MAXN], dep[MAXN];
vector<int> ss[MAXN];
bool chkn[MAXN], chks[MAXN];
queue<int> q;
vector<int> ge[MAXN];
int r[MAXN];

void dfs(int x){
	for(auto a:e[x]) if(a!=par[0][x]){
		par[0][a]=x;
		dep[a]=dep[x]+1;
		dfs(a);
	}
}

int anc(int x, int d){
	if(d>dep[x]) return 0;
	for(int i=19; i>=0; i--) if((dep[x]-d)&(1<<i)) x=par[i][x];
	return x;
}

int lca(int x, int y){
	if(dep[x]>dep[y]) x=anc(x, dep[y]);
	else y=anc(y, dep[x]);
	if(x==y) return x;
	for(int i=19; i>=0; i--) if(par[i][x]!=par[i][y]){
		x=par[i][x];
		y=par[i][y];
	}
	return par[0][x];
}

int uni(int x){
	if(r[x]==x) return x;
	return r[x]=uni(r[x]);
}

int main(){
	int N, K;
	int ans=0;

	scanf("%d%d", &N, &K);
	for(int i=0; i<N-1; i++) scanf("%d%d", A+i, B+i);
	for(int i=1; i<=N; i++) scanf("%d", S+i);

	for(int i=0; i<N-1; i++){
		e[A[i]].push_back(B[i]);
		e[B[i]].push_back(A[i]);
	}
	par[0][1]=1;
	dfs(1);
	for(int i=1; i<20; i++) for(int j=1; j<=N; j++) par[i][j]=par[i-1][par[i-1][j]];
	//for(int i=1; i<=N; i++) printf("%d %d %d\n", par[0][i], par[1][i], par[2][i]);
	for(int i=1; i<=N; i++) ss[S[i]].push_back(i);
	//for(int i=1; i<=K; i++) printf("%d\n", ss[i].size());
	
	for(int i=1; i<=N; i++) r[i]=i;
	for(int i=1; i<=K; i++) if(!chks[i]){
		chks[i]=true;
		q.push(i);
		//printf("[%d]\n", i);
		while(!q.empty()){
			int t=q.front();
			q.pop();
			int l=ss[t][0];
			for(auto a:ss[t]) l=lca(l, a);
			//printf("lca=%d\n", l);
			for(auto a:ss[t]){
				chkn[a]=true;
				for(int j=uni(a); dep[j]>dep[l]; j=uni(j)){
					chkn[par[0][j]]=true;
					r[uni(j)]=uni(par[0][uni(j)]);
				}
			}
		}
	}

	//for(int i=1; i<=K; i++) printf("%d ", gs[i]);

	for(int i=0; i<N-1; i++) if(uni(A[i])!=uni(B[i])){
		ge[uni(A[i])].push_back(uni(B[i]));
		ge[uni(B[i])].push_back(uni(A[i]));
		//printf("(%d %d)\n", S[A[i]], S[B[i]]);
	}
	for(int i=1; i<=N; i++){
		sort(ge[i].begin(), ge[i].end());
		if(distance(ge[i].begin(), unique(ge[i].begin(), ge[i].end()))==1) ans++;
	}

	//printf("\n%d\n", ans);
	printf("%d", (ans+1)/2);
	return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:53:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &K);
  ~~~~~^~~~~~~~~~~~~~~~
mergers.cpp:54:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0; i<N-1; i++) scanf("%d%d", A+i, B+i);
                           ~~~~~^~~~~~~~~~~~~~~~~~
mergers.cpp:55:31: 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);
                          ~~~~~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 35712 KB Output is correct
2 Correct 32 ms 35712 KB Output is correct
3 Correct 32 ms 35712 KB Output is correct
4 Correct 33 ms 35684 KB Output is correct
5 Correct 32 ms 35712 KB Output is correct
6 Correct 32 ms 35704 KB Output is correct
7 Correct 32 ms 35708 KB Output is correct
8 Correct 34 ms 35684 KB Output is correct
9 Correct 33 ms 35704 KB Output is correct
10 Correct 32 ms 35808 KB Output is correct
11 Correct 30 ms 35712 KB Output is correct
12 Correct 31 ms 35684 KB Output is correct
13 Correct 33 ms 35684 KB Output is correct
14 Correct 33 ms 35712 KB Output is correct
15 Correct 32 ms 35704 KB Output is correct
16 Correct 32 ms 35772 KB Output is correct
17 Correct 32 ms 35704 KB Output is correct
18 Correct 32 ms 35704 KB Output is correct
19 Correct 31 ms 35712 KB Output is correct
20 Correct 31 ms 35768 KB Output is correct
21 Correct 31 ms 35704 KB Output is correct
22 Correct 32 ms 35712 KB Output is correct
23 Correct 31 ms 35712 KB Output is correct
24 Correct 30 ms 35712 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 35712 KB Output is correct
2 Correct 32 ms 35712 KB Output is correct
3 Correct 32 ms 35712 KB Output is correct
4 Correct 33 ms 35684 KB Output is correct
5 Correct 32 ms 35712 KB Output is correct
6 Correct 32 ms 35704 KB Output is correct
7 Correct 32 ms 35708 KB Output is correct
8 Correct 34 ms 35684 KB Output is correct
9 Correct 33 ms 35704 KB Output is correct
10 Correct 32 ms 35808 KB Output is correct
11 Correct 30 ms 35712 KB Output is correct
12 Correct 31 ms 35684 KB Output is correct
13 Correct 33 ms 35684 KB Output is correct
14 Correct 33 ms 35712 KB Output is correct
15 Correct 32 ms 35704 KB Output is correct
16 Correct 32 ms 35772 KB Output is correct
17 Correct 32 ms 35704 KB Output is correct
18 Correct 32 ms 35704 KB Output is correct
19 Correct 31 ms 35712 KB Output is correct
20 Correct 31 ms 35768 KB Output is correct
21 Correct 31 ms 35704 KB Output is correct
22 Correct 32 ms 35712 KB Output is correct
23 Correct 31 ms 35712 KB Output is correct
24 Correct 30 ms 35712 KB Output is correct
25 Correct 31 ms 35704 KB Output is correct
26 Correct 33 ms 36224 KB Output is correct
27 Correct 35 ms 36120 KB Output is correct
28 Correct 36 ms 36316 KB Output is correct
29 Correct 35 ms 36304 KB Output is correct
30 Correct 39 ms 36168 KB Output is correct
31 Correct 33 ms 35712 KB Output is correct
32 Correct 34 ms 36352 KB Output is correct
33 Correct 32 ms 35816 KB Output is correct
34 Correct 33 ms 36132 KB Output is correct
35 Correct 35 ms 36312 KB Output is correct
36 Correct 35 ms 36224 KB Output is correct
37 Correct 36 ms 36268 KB Output is correct
38 Correct 33 ms 35804 KB Output is correct
39 Correct 36 ms 36196 KB Output is correct
40 Correct 35 ms 36204 KB Output is correct
41 Correct 34 ms 36224 KB Output is correct
42 Correct 35 ms 36188 KB Output is correct
43 Correct 35 ms 36344 KB Output is correct
44 Correct 32 ms 35704 KB Output is correct
45 Correct 34 ms 36216 KB Output is correct
46 Correct 35 ms 36216 KB Output is correct
47 Correct 31 ms 35712 KB Output is correct
48 Correct 36 ms 36216 KB Output is correct
49 Correct 34 ms 36344 KB Output is correct
50 Correct 36 ms 36344 KB Output is correct
51 Correct 34 ms 36224 KB Output is correct
52 Correct 34 ms 36152 KB Output is correct
53 Correct 33 ms 36216 KB Output is correct
54 Correct 34 ms 36216 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 35712 KB Output is correct
2 Correct 32 ms 35712 KB Output is correct
3 Correct 32 ms 35712 KB Output is correct
4 Correct 33 ms 35684 KB Output is correct
5 Correct 32 ms 35712 KB Output is correct
6 Correct 32 ms 35704 KB Output is correct
7 Correct 32 ms 35708 KB Output is correct
8 Correct 34 ms 35684 KB Output is correct
9 Correct 33 ms 35704 KB Output is correct
10 Correct 32 ms 35808 KB Output is correct
11 Correct 30 ms 35712 KB Output is correct
12 Correct 31 ms 35684 KB Output is correct
13 Correct 33 ms 35684 KB Output is correct
14 Correct 33 ms 35712 KB Output is correct
15 Correct 32 ms 35704 KB Output is correct
16 Correct 32 ms 35772 KB Output is correct
17 Correct 32 ms 35704 KB Output is correct
18 Correct 32 ms 35704 KB Output is correct
19 Correct 31 ms 35712 KB Output is correct
20 Correct 31 ms 35768 KB Output is correct
21 Correct 31 ms 35704 KB Output is correct
22 Correct 32 ms 35712 KB Output is correct
23 Correct 31 ms 35712 KB Output is correct
24 Correct 30 ms 35712 KB Output is correct
25 Correct 32 ms 35708 KB Output is correct
26 Correct 91 ms 49904 KB Output is correct
27 Correct 122 ms 49528 KB Output is correct
28 Correct 33 ms 36144 KB Output is correct
29 Correct 31 ms 35712 KB Output is correct
30 Correct 31 ms 35712 KB Output is correct
31 Correct 118 ms 49532 KB Output is correct
32 Correct 35 ms 36216 KB Output is correct
33 Correct 170 ms 54000 KB Output is correct
34 Correct 126 ms 49528 KB Output is correct
35 Correct 34 ms 36216 KB Output is correct
36 Correct 148 ms 49784 KB Output is correct
37 Correct 36 ms 36216 KB Output is correct
38 Correct 35 ms 36224 KB Output is correct
39 Correct 97 ms 49776 KB Output is correct
40 Correct 41 ms 36344 KB Output is correct
41 Correct 115 ms 49524 KB Output is correct
42 Correct 158 ms 50780 KB Output is correct
43 Correct 31 ms 35704 KB Output is correct
44 Correct 167 ms 54084 KB Output is correct
45 Correct 138 ms 51832 KB Output is correct
46 Correct 38 ms 36224 KB Output is correct
47 Correct 33 ms 36216 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 146 ms 49776 KB Output is correct
2 Correct 148 ms 55916 KB Output is correct
3 Correct 34 ms 36216 KB Output is correct
4 Correct 34 ms 36216 KB Output is correct
5 Correct 31 ms 35704 KB Output is correct
6 Correct 32 ms 35712 KB Output is correct
7 Correct 35 ms 36344 KB Output is correct
8 Correct 153 ms 51064 KB Output is correct
9 Correct 35 ms 36216 KB Output is correct
10 Correct 118 ms 49656 KB Output is correct
11 Correct 34 ms 35748 KB Output is correct
12 Correct 152 ms 49696 KB Output is correct
13 Correct 164 ms 51528 KB Output is correct
14 Correct 189 ms 55672 KB Output is correct
15 Correct 99 ms 50032 KB Output is correct
16 Correct 35 ms 36272 KB Output is correct
17 Correct 32 ms 35704 KB Output is correct
18 Correct 157 ms 55248 KB Output is correct
19 Correct 204 ms 57800 KB Output is correct
20 Correct 34 ms 36216 KB Output is correct
21 Correct 31 ms 35704 KB Output is correct
22 Correct 126 ms 51756 KB Output is correct
23 Correct 34 ms 36216 KB Output is correct
24 Correct 147 ms 50296 KB Output is correct
25 Correct 181 ms 57080 KB Output is correct
26 Correct 36 ms 36344 KB Output is correct
27 Correct 35 ms 36344 KB Output is correct
28 Correct 37 ms 36260 KB Output is correct
29 Correct 36 ms 36216 KB Output is correct
30 Correct 78 ms 36216 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 35712 KB Output is correct
2 Correct 32 ms 35712 KB Output is correct
3 Correct 32 ms 35712 KB Output is correct
4 Correct 33 ms 35684 KB Output is correct
5 Correct 32 ms 35712 KB Output is correct
6 Correct 32 ms 35704 KB Output is correct
7 Correct 32 ms 35708 KB Output is correct
8 Correct 34 ms 35684 KB Output is correct
9 Correct 33 ms 35704 KB Output is correct
10 Correct 32 ms 35808 KB Output is correct
11 Correct 30 ms 35712 KB Output is correct
12 Correct 31 ms 35684 KB Output is correct
13 Correct 33 ms 35684 KB Output is correct
14 Correct 33 ms 35712 KB Output is correct
15 Correct 32 ms 35704 KB Output is correct
16 Correct 32 ms 35772 KB Output is correct
17 Correct 32 ms 35704 KB Output is correct
18 Correct 32 ms 35704 KB Output is correct
19 Correct 31 ms 35712 KB Output is correct
20 Correct 31 ms 35768 KB Output is correct
21 Correct 31 ms 35704 KB Output is correct
22 Correct 32 ms 35712 KB Output is correct
23 Correct 31 ms 35712 KB Output is correct
24 Correct 30 ms 35712 KB Output is correct
25 Correct 31 ms 35704 KB Output is correct
26 Correct 33 ms 36224 KB Output is correct
27 Correct 35 ms 36120 KB Output is correct
28 Correct 36 ms 36316 KB Output is correct
29 Correct 35 ms 36304 KB Output is correct
30 Correct 39 ms 36168 KB Output is correct
31 Correct 33 ms 35712 KB Output is correct
32 Correct 34 ms 36352 KB Output is correct
33 Correct 32 ms 35816 KB Output is correct
34 Correct 33 ms 36132 KB Output is correct
35 Correct 35 ms 36312 KB Output is correct
36 Correct 35 ms 36224 KB Output is correct
37 Correct 36 ms 36268 KB Output is correct
38 Correct 33 ms 35804 KB Output is correct
39 Correct 36 ms 36196 KB Output is correct
40 Correct 35 ms 36204 KB Output is correct
41 Correct 34 ms 36224 KB Output is correct
42 Correct 35 ms 36188 KB Output is correct
43 Correct 35 ms 36344 KB Output is correct
44 Correct 32 ms 35704 KB Output is correct
45 Correct 34 ms 36216 KB Output is correct
46 Correct 35 ms 36216 KB Output is correct
47 Correct 31 ms 35712 KB Output is correct
48 Correct 36 ms 36216 KB Output is correct
49 Correct 34 ms 36344 KB Output is correct
50 Correct 36 ms 36344 KB Output is correct
51 Correct 34 ms 36224 KB Output is correct
52 Correct 34 ms 36152 KB Output is correct
53 Correct 33 ms 36216 KB Output is correct
54 Correct 34 ms 36216 KB Output is correct
55 Correct 32 ms 35708 KB Output is correct
56 Correct 91 ms 49904 KB Output is correct
57 Correct 122 ms 49528 KB Output is correct
58 Correct 33 ms 36144 KB Output is correct
59 Correct 31 ms 35712 KB Output is correct
60 Correct 31 ms 35712 KB Output is correct
61 Correct 118 ms 49532 KB Output is correct
62 Correct 35 ms 36216 KB Output is correct
63 Correct 170 ms 54000 KB Output is correct
64 Correct 126 ms 49528 KB Output is correct
65 Correct 34 ms 36216 KB Output is correct
66 Correct 148 ms 49784 KB Output is correct
67 Correct 36 ms 36216 KB Output is correct
68 Correct 35 ms 36224 KB Output is correct
69 Correct 97 ms 49776 KB Output is correct
70 Correct 41 ms 36344 KB Output is correct
71 Correct 115 ms 49524 KB Output is correct
72 Correct 158 ms 50780 KB Output is correct
73 Correct 31 ms 35704 KB Output is correct
74 Correct 167 ms 54084 KB Output is correct
75 Correct 138 ms 51832 KB Output is correct
76 Correct 38 ms 36224 KB Output is correct
77 Correct 33 ms 36216 KB Output is correct
78 Correct 146 ms 49776 KB Output is correct
79 Correct 148 ms 55916 KB Output is correct
80 Correct 34 ms 36216 KB Output is correct
81 Correct 34 ms 36216 KB Output is correct
82 Correct 31 ms 35704 KB Output is correct
83 Correct 32 ms 35712 KB Output is correct
84 Correct 35 ms 36344 KB Output is correct
85 Correct 153 ms 51064 KB Output is correct
86 Correct 35 ms 36216 KB Output is correct
87 Correct 118 ms 49656 KB Output is correct
88 Correct 34 ms 35748 KB Output is correct
89 Correct 152 ms 49696 KB Output is correct
90 Correct 164 ms 51528 KB Output is correct
91 Correct 189 ms 55672 KB Output is correct
92 Correct 99 ms 50032 KB Output is correct
93 Correct 35 ms 36272 KB Output is correct
94 Correct 32 ms 35704 KB Output is correct
95 Correct 157 ms 55248 KB Output is correct
96 Correct 204 ms 57800 KB Output is correct
97 Correct 34 ms 36216 KB Output is correct
98 Correct 31 ms 35704 KB Output is correct
99 Correct 126 ms 51756 KB Output is correct
100 Correct 34 ms 36216 KB Output is correct
101 Correct 147 ms 50296 KB Output is correct
102 Correct 181 ms 57080 KB Output is correct
103 Correct 36 ms 36344 KB Output is correct
104 Correct 35 ms 36344 KB Output is correct
105 Correct 37 ms 36260 KB Output is correct
106 Correct 36 ms 36216 KB Output is correct
107 Correct 78 ms 36216 KB Output is correct
108 Correct 824 ms 111132 KB Output is correct
109 Correct 1109 ms 114152 KB Output is correct
110 Correct 1241 ms 120944 KB Output is correct
111 Correct 1433 ms 145784 KB Output is correct
112 Correct 1298 ms 134716 KB Output is correct
113 Correct 940 ms 131888 KB Output is correct
114 Correct 657 ms 103632 KB Output is correct
115 Correct 681 ms 103656 KB Output is correct
116 Correct 1110 ms 106592 KB Output is correct
117 Correct 1324 ms 133868 KB Output is correct
118 Correct 796 ms 103360 KB Output is correct
119 Correct 1299 ms 133952 KB Output is correct
120 Correct 1363 ms 141400 KB Output is correct
121 Correct 1304 ms 133824 KB Output is correct
122 Correct 1138 ms 114144 KB Output is correct
123 Correct 907 ms 136644 KB Output is correct
124 Correct 1340 ms 125964 KB Output is correct