답안 #128979

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
128979	2019-07-11T11:43:58 Z	PeppaPig	Mergers (JOI19_mergers)	C++14	100 / 100	2067 ms	127060 KB

mergers

#include <bits/stdc++.h>
 
using namespace std;
 
const int N = 5e5+5;
 
int n, k, ans;
int qs[N], col[N], deg[N];
vector<int> g[N], st[N];
vector<pair<int, int> > E;
 
int par[N][20], dep[N];
 
void init_lca(int u, int p) {
    par[u][0] = p, dep[u] = dep[p] + 1;
    for(int i = 1; i < 20; i++) par[u][i] = par[par[u][i-1]][i-1];
    for(int v : g[u]) if(v != p) init_lca(v, u);
}
 
int lca(int a, int b) {
    if(dep[a] < dep[b]) swap(a, b);
    for(int i = 19; ~i; i--) if(dep[par[a][i]] >= dep[b]) a = par[a][i];
    if(a == b) return a;
    for(int i = 19; ~i; i--) if(par[a][i] != par[b][i]) a = par[a][i], b = par[b][i];
    return par[a][0];
}
 
 
void solve_qs(int u, int p) {
    for(int v : g[u]) if(v != p) {
        solve_qs(v, u);
        qs[u] += qs[v];
    }
}
 
void flood(int u, int c) {
    col[u] = c;
    for(int v : g[u]) {
        if((!qs[v] && par[v][0] == u) || (par[u][0] == v && !qs[u])) continue;
        if(!col[v]) flood(v, c);
    }
}
 
 
int main() {
    scanf("%d %d", &n, &k);
    for(int i = 1, a, b; i < n; i++) {
        scanf("%d %d", &a, &b);
        g[a].emplace_back(b);
        g[b].emplace_back(a);
        E.emplace_back(a, b);
    }
    init_lca(1, 0);
    for(int i = 1, a; i <= n; i++) {
        scanf("%d", &a);
        st[a].emplace_back(i);
    }
    for(int i = 1; i <= k; i++) for(int j = 1; j < st[i].size(); j++) {
        int l = lca(st[i][j-1], st[i][j]);
        ++qs[st[i][j-1]];
        ++qs[st[i][j]];
        qs[l] -= 2;
    }
    solve_qs(1, 0);
    for(int i = 1, ptr = 0; i <= n; i++) if(!col[i]) flood(i, ++ptr);
    for(pair<int, int> p : E) {
        int a, b; tie(a, b) = p;
        if(col[a] != col[b]) ++deg[col[a]], ++deg[col[b]];
    }
    for(int i = 1; i <= n; i++) if(deg[i] == 1) ++ans;
    printf("%d\n", (ans + 1) / 2);
 
    return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:58:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 1; i <= k; i++) for(int j = 1; j < st[i].size(); j++) {
                                                ~~^~~~~~~~~~~~~~
mergers.cpp:46:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:48:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:55:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a);
         ~~~~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	23 ms	23800 KB	Output is correct
3	Correct	24 ms	23900 KB	Output is correct
4	Correct	28 ms	23804 KB	Output is correct
5	Correct	23 ms	23800 KB	Output is correct
6	Correct	23 ms	23800 KB	Output is correct
7	Correct	24 ms	23800 KB	Output is correct
8	Correct	23 ms	23800 KB	Output is correct
9	Correct	23 ms	23800 KB	Output is correct
10	Correct	23 ms	23800 KB	Output is correct
11	Correct	24 ms	23800 KB	Output is correct
12	Correct	24 ms	23800 KB	Output is correct
13	Correct	23 ms	23928 KB	Output is correct
14	Correct	24 ms	23800 KB	Output is correct
15	Correct	24 ms	23928 KB	Output is correct
16	Correct	23 ms	23800 KB	Output is correct
17	Correct	24 ms	23800 KB	Output is correct
18	Correct	23 ms	23928 KB	Output is correct
19	Correct	23 ms	23840 KB	Output is correct
20	Correct	23 ms	23800 KB	Output is correct
21	Correct	23 ms	23900 KB	Output is correct
22	Correct	23 ms	23804 KB	Output is correct
23	Correct	23 ms	23800 KB	Output is correct
24	Correct	23 ms	23800 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	23 ms	23800 KB	Output is correct
3	Correct	24 ms	23900 KB	Output is correct
4	Correct	28 ms	23804 KB	Output is correct
5	Correct	23 ms	23800 KB	Output is correct
6	Correct	23 ms	23800 KB	Output is correct
7	Correct	24 ms	23800 KB	Output is correct
8	Correct	23 ms	23800 KB	Output is correct
9	Correct	23 ms	23800 KB	Output is correct
10	Correct	23 ms	23800 KB	Output is correct
11	Correct	24 ms	23800 KB	Output is correct
12	Correct	24 ms	23800 KB	Output is correct
13	Correct	23 ms	23928 KB	Output is correct
14	Correct	24 ms	23800 KB	Output is correct
15	Correct	24 ms	23928 KB	Output is correct
16	Correct	23 ms	23800 KB	Output is correct
17	Correct	24 ms	23800 KB	Output is correct
18	Correct	23 ms	23928 KB	Output is correct
19	Correct	23 ms	23840 KB	Output is correct
20	Correct	23 ms	23800 KB	Output is correct
21	Correct	23 ms	23900 KB	Output is correct
22	Correct	23 ms	23804 KB	Output is correct
23	Correct	23 ms	23800 KB	Output is correct
24	Correct	23 ms	23800 KB	Output is correct
25	Correct	24 ms	23928 KB	Output is correct
26	Correct	27 ms	24312 KB	Output is correct
27	Correct	27 ms	24312 KB	Output is correct
28	Correct	27 ms	24440 KB	Output is correct
29	Correct	26 ms	24440 KB	Output is correct
30	Correct	27 ms	24312 KB	Output is correct
31	Correct	24 ms	23800 KB	Output is correct
32	Correct	26 ms	24572 KB	Output is correct
33	Correct	24 ms	23928 KB	Output is correct
34	Correct	26 ms	24312 KB	Output is correct
35	Correct	26 ms	24440 KB	Output is correct
36	Correct	26 ms	24312 KB	Output is correct
37	Correct	26 ms	24440 KB	Output is correct
38	Correct	24 ms	23928 KB	Output is correct
39	Correct	27 ms	24312 KB	Output is correct
40	Correct	27 ms	24284 KB	Output is correct
41	Correct	27 ms	24312 KB	Output is correct
42	Correct	27 ms	24312 KB	Output is correct
43	Correct	27 ms	24404 KB	Output is correct
44	Correct	24 ms	23800 KB	Output is correct
45	Correct	26 ms	24444 KB	Output is correct
46	Correct	27 ms	24312 KB	Output is correct
47	Correct	25 ms	23928 KB	Output is correct
48	Correct	27 ms	24312 KB	Output is correct
49	Correct	26 ms	24312 KB	Output is correct
50	Correct	27 ms	24440 KB	Output is correct
51	Correct	27 ms	24312 KB	Output is correct
52	Correct	26 ms	24312 KB	Output is correct
53	Correct	26 ms	24312 KB	Output is correct
54	Correct	27 ms	24440 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	23 ms	23800 KB	Output is correct
3	Correct	24 ms	23900 KB	Output is correct
4	Correct	28 ms	23804 KB	Output is correct
5	Correct	23 ms	23800 KB	Output is correct
6	Correct	23 ms	23800 KB	Output is correct
7	Correct	24 ms	23800 KB	Output is correct
8	Correct	23 ms	23800 KB	Output is correct
9	Correct	23 ms	23800 KB	Output is correct
10	Correct	23 ms	23800 KB	Output is correct
11	Correct	24 ms	23800 KB	Output is correct
12	Correct	24 ms	23800 KB	Output is correct
13	Correct	23 ms	23928 KB	Output is correct
14	Correct	24 ms	23800 KB	Output is correct
15	Correct	24 ms	23928 KB	Output is correct
16	Correct	23 ms	23800 KB	Output is correct
17	Correct	24 ms	23800 KB	Output is correct
18	Correct	23 ms	23928 KB	Output is correct
19	Correct	23 ms	23840 KB	Output is correct
20	Correct	23 ms	23800 KB	Output is correct
21	Correct	23 ms	23900 KB	Output is correct
22	Correct	23 ms	23804 KB	Output is correct
23	Correct	23 ms	23800 KB	Output is correct
24	Correct	23 ms	23800 KB	Output is correct
25	Correct	23 ms	23928 KB	Output is correct
26	Correct	128 ms	38592 KB	Output is correct
27	Correct	199 ms	38352 KB	Output is correct
28	Correct	27 ms	24224 KB	Output is correct
29	Correct	28 ms	23928 KB	Output is correct
30	Correct	24 ms	23928 KB	Output is correct
31	Correct	172 ms	38252 KB	Output is correct
32	Correct	27 ms	24312 KB	Output is correct
33	Correct	291 ms	44012 KB	Output is correct
34	Correct	169 ms	38664 KB	Output is correct
35	Correct	30 ms	24216 KB	Output is correct
36	Correct	261 ms	39148 KB	Output is correct
37	Correct	27 ms	24312 KB	Output is correct
38	Correct	31 ms	24312 KB	Output is correct
39	Correct	149 ms	38912 KB	Output is correct
40	Correct	26 ms	24440 KB	Output is correct
41	Correct	188 ms	39132 KB	Output is correct
42	Correct	247 ms	41068 KB	Output is correct
43	Correct	24 ms	23800 KB	Output is correct
44	Correct	282 ms	44908 KB	Output is correct
45	Correct	260 ms	41496 KB	Output is correct
46	Correct	26 ms	24312 KB	Output is correct
47	Correct	27 ms	24312 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	154 ms	38112 KB	Output is correct
2	Correct	129 ms	40676 KB	Output is correct
3	Correct	26 ms	24312 KB	Output is correct
4	Correct	26 ms	24312 KB	Output is correct
5	Correct	23 ms	23928 KB	Output is correct
6	Correct	23 ms	23928 KB	Output is correct
7	Correct	25 ms	24312 KB	Output is correct
8	Correct	208 ms	39444 KB	Output is correct
9	Correct	32 ms	24312 KB	Output is correct
10	Correct	178 ms	38380 KB	Output is correct
11	Correct	24 ms	23928 KB	Output is correct
12	Correct	271 ms	38384 KB	Output is correct
13	Correct	203 ms	39388 KB	Output is correct
14	Correct	172 ms	41456 KB	Output is correct
15	Correct	135 ms	38552 KB	Output is correct
16	Correct	26 ms	24312 KB	Output is correct
17	Correct	23 ms	23800 KB	Output is correct
18	Correct	147 ms	41196 KB	Output is correct
19	Correct	187 ms	44552 KB	Output is correct
20	Correct	27 ms	24312 KB	Output is correct
21	Correct	23 ms	23800 KB	Output is correct
22	Correct	136 ms	39832 KB	Output is correct
23	Correct	27 ms	24316 KB	Output is correct
24	Correct	192 ms	38784 KB	Output is correct
25	Correct	182 ms	43412 KB	Output is correct
26	Correct	92 ms	24440 KB	Output is correct
27	Correct	26 ms	24568 KB	Output is correct
28	Correct	27 ms	24312 KB	Output is correct
29	Correct	25 ms	24312 KB	Output is correct
30	Correct	27 ms	24440 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	23 ms	23800 KB	Output is correct
3	Correct	24 ms	23900 KB	Output is correct
4	Correct	28 ms	23804 KB	Output is correct
5	Correct	23 ms	23800 KB	Output is correct
6	Correct	23 ms	23800 KB	Output is correct
7	Correct	24 ms	23800 KB	Output is correct
8	Correct	23 ms	23800 KB	Output is correct
9	Correct	23 ms	23800 KB	Output is correct
10	Correct	23 ms	23800 KB	Output is correct
11	Correct	24 ms	23800 KB	Output is correct
12	Correct	24 ms	23800 KB	Output is correct
13	Correct	23 ms	23928 KB	Output is correct
14	Correct	24 ms	23800 KB	Output is correct
15	Correct	24 ms	23928 KB	Output is correct
16	Correct	23 ms	23800 KB	Output is correct
17	Correct	24 ms	23800 KB	Output is correct
18	Correct	23 ms	23928 KB	Output is correct
19	Correct	23 ms	23840 KB	Output is correct
20	Correct	23 ms	23800 KB	Output is correct
21	Correct	23 ms	23900 KB	Output is correct
22	Correct	23 ms	23804 KB	Output is correct
23	Correct	23 ms	23800 KB	Output is correct
24	Correct	23 ms	23800 KB	Output is correct
25	Correct	24 ms	23928 KB	Output is correct
26	Correct	27 ms	24312 KB	Output is correct
27	Correct	27 ms	24312 KB	Output is correct
28	Correct	27 ms	24440 KB	Output is correct
29	Correct	26 ms	24440 KB	Output is correct
30	Correct	27 ms	24312 KB	Output is correct
31	Correct	24 ms	23800 KB	Output is correct
32	Correct	26 ms	24572 KB	Output is correct
33	Correct	24 ms	23928 KB	Output is correct
34	Correct	26 ms	24312 KB	Output is correct
35	Correct	26 ms	24440 KB	Output is correct
36	Correct	26 ms	24312 KB	Output is correct
37	Correct	26 ms	24440 KB	Output is correct
38	Correct	24 ms	23928 KB	Output is correct
39	Correct	27 ms	24312 KB	Output is correct
40	Correct	27 ms	24284 KB	Output is correct
41	Correct	27 ms	24312 KB	Output is correct
42	Correct	27 ms	24312 KB	Output is correct
43	Correct	27 ms	24404 KB	Output is correct
44	Correct	24 ms	23800 KB	Output is correct
45	Correct	26 ms	24444 KB	Output is correct
46	Correct	27 ms	24312 KB	Output is correct
47	Correct	25 ms	23928 KB	Output is correct
48	Correct	27 ms	24312 KB	Output is correct
49	Correct	26 ms	24312 KB	Output is correct
50	Correct	27 ms	24440 KB	Output is correct
51	Correct	27 ms	24312 KB	Output is correct
52	Correct	26 ms	24312 KB	Output is correct
53	Correct	26 ms	24312 KB	Output is correct
54	Correct	27 ms	24440 KB	Output is correct
55	Correct	23 ms	23928 KB	Output is correct
56	Correct	128 ms	38592 KB	Output is correct
57	Correct	199 ms	38352 KB	Output is correct
58	Correct	27 ms	24224 KB	Output is correct
59	Correct	28 ms	23928 KB	Output is correct
60	Correct	24 ms	23928 KB	Output is correct
61	Correct	172 ms	38252 KB	Output is correct
62	Correct	27 ms	24312 KB	Output is correct
63	Correct	291 ms	44012 KB	Output is correct
64	Correct	169 ms	38664 KB	Output is correct
65	Correct	30 ms	24216 KB	Output is correct
66	Correct	261 ms	39148 KB	Output is correct
67	Correct	27 ms	24312 KB	Output is correct
68	Correct	31 ms	24312 KB	Output is correct
69	Correct	149 ms	38912 KB	Output is correct
70	Correct	26 ms	24440 KB	Output is correct
71	Correct	188 ms	39132 KB	Output is correct
72	Correct	247 ms	41068 KB	Output is correct
73	Correct	24 ms	23800 KB	Output is correct
74	Correct	282 ms	44908 KB	Output is correct
75	Correct	260 ms	41496 KB	Output is correct
76	Correct	26 ms	24312 KB	Output is correct
77	Correct	27 ms	24312 KB	Output is correct
78	Correct	154 ms	38112 KB	Output is correct
79	Correct	129 ms	40676 KB	Output is correct
80	Correct	26 ms	24312 KB	Output is correct
81	Correct	26 ms	24312 KB	Output is correct
82	Correct	23 ms	23928 KB	Output is correct
83	Correct	23 ms	23928 KB	Output is correct
84	Correct	25 ms	24312 KB	Output is correct
85	Correct	208 ms	39444 KB	Output is correct
86	Correct	32 ms	24312 KB	Output is correct
87	Correct	178 ms	38380 KB	Output is correct
88	Correct	24 ms	23928 KB	Output is correct
89	Correct	271 ms	38384 KB	Output is correct
90	Correct	203 ms	39388 KB	Output is correct
91	Correct	172 ms	41456 KB	Output is correct
92	Correct	135 ms	38552 KB	Output is correct
93	Correct	26 ms	24312 KB	Output is correct
94	Correct	23 ms	23800 KB	Output is correct
95	Correct	147 ms	41196 KB	Output is correct
96	Correct	187 ms	44552 KB	Output is correct
97	Correct	27 ms	24312 KB	Output is correct
98	Correct	23 ms	23800 KB	Output is correct
99	Correct	136 ms	39832 KB	Output is correct
100	Correct	27 ms	24316 KB	Output is correct
101	Correct	192 ms	38784 KB	Output is correct
102	Correct	182 ms	43412 KB	Output is correct
103	Correct	92 ms	24440 KB	Output is correct
104	Correct	26 ms	24568 KB	Output is correct
105	Correct	27 ms	24312 KB	Output is correct
106	Correct	25 ms	24312 KB	Output is correct
107	Correct	27 ms	24440 KB	Output is correct
108	Correct	825 ms	99160 KB	Output is correct
109	Correct	1997 ms	109080 KB	Output is correct
110	Correct	2067 ms	118260 KB	Output is correct
111	Correct	1220 ms	127060 KB	Output is correct
112	Correct	1226 ms	118492 KB	Output is correct
113	Correct	888 ms	108212 KB	Output is correct
114	Correct	1094 ms	94556 KB	Output is correct
115	Correct	1106 ms	95060 KB	Output is correct
116	Correct	1286 ms	96116 KB	Output is correct
117	Correct	1014 ms	108800 KB	Output is correct
118	Correct	1066 ms	93036 KB	Output is correct
119	Correct	999 ms	108832 KB	Output is correct
120	Correct	1244 ms	119816 KB	Output is correct
121	Correct	1028 ms	108736 KB	Output is correct
122	Correct	1185 ms	100916 KB	Output is correct
123	Correct	720 ms	108208 KB	Output is correct
124	Correct	1205 ms	106240 KB	Output is correct

답안 #128979

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