oj.uz

Submission #128985

# Submission time Handle Problem Language Result Execution time Memory
128985 2019-07-11T11:50:30 Z PeppaPig Mergers (JOI19_mergers) C++14
100 / 100
 2041 ms 123016 KB 
#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, int &cnt) {
    col[u] = c;
    for(int v : g[u]) {
        if((!qs[v] && par[v][0] == u) || (par[u][0] == v && !qs[u])) {
            ++cnt;
            continue;
        }
        if(!col[v]) flood(v, c, cnt);
    }
}
 
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]) {
        int cnt = 0;
        flood(i, ++ptr, cnt);
        if(cnt == 1) ++ans;
    }
    printf("%d\n", (ans + 1) / 2);
 
    return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:59:50: 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:47:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:56:14: 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

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23804 KB Output is correct
2 Correct 24 ms 23928 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 23 ms 23800 KB Output is correct
5 Correct 24 ms 23800 KB Output is correct
6 Correct 23 ms 23928 KB Output is correct
7 Correct 24 ms 23800 KB Output is correct
8 Correct 24 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 28 ms 23800 KB Output is correct
12 Correct 29 ms 23800 KB Output is correct
13 Correct 25 ms 23800 KB Output is correct
14 Correct 23 ms 23800 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 23 ms 23812 KB Output is correct
17 Correct 23 ms 23800 KB Output is correct
18 Correct 23 ms 23820 KB Output is correct
19 Correct 24 ms 23772 KB Output is correct
20 Correct 24 ms 23800 KB Output is correct
21 Correct 23 ms 23804 KB Output is correct
22 Correct 24 ms 23928 KB Output is correct
23 Correct 23 ms 23800 KB Output is correct
24 Correct 23 ms 23928 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23804 KB Output is correct
2 Correct 24 ms 23928 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 23 ms 23800 KB Output is correct
5 Correct 24 ms 23800 KB Output is correct
6 Correct 23 ms 23928 KB Output is correct
7 Correct 24 ms 23800 KB Output is correct
8 Correct 24 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 28 ms 23800 KB Output is correct
12 Correct 29 ms 23800 KB Output is correct
13 Correct 25 ms 23800 KB Output is correct
14 Correct 23 ms 23800 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 23 ms 23812 KB Output is correct
17 Correct 23 ms 23800 KB Output is correct
18 Correct 23 ms 23820 KB Output is correct
19 Correct 24 ms 23772 KB Output is correct
20 Correct 24 ms 23800 KB Output is correct
21 Correct 23 ms 23804 KB Output is correct
22 Correct 24 ms 23928 KB Output is correct
23 Correct 23 ms 23800 KB Output is correct
24 Correct 23 ms 23928 KB Output is correct
25 Correct 23 ms 23800 KB Output is correct
26 Correct 26 ms 24312 KB Output is correct
27 Correct 26 ms 24284 KB Output is correct
28 Correct 26 ms 24432 KB Output is correct
29 Correct 26 ms 24252 KB Output is correct
30 Correct 27 ms 24312 KB Output is correct
31 Correct 24 ms 23928 KB Output is correct
32 Correct 28 ms 24440 KB Output is correct
33 Correct 25 ms 23800 KB Output is correct
34 Correct 26 ms 24312 KB Output is correct
35 Correct 26 ms 24312 KB Output is correct
36 Correct 26 ms 24312 KB Output is correct
37 Correct 26 ms 24312 KB Output is correct
38 Correct 23 ms 23928 KB Output is correct
39 Correct 27 ms 24312 KB Output is correct
40 Correct 26 ms 24184 KB Output is correct
41 Correct 26 ms 24184 KB Output is correct
42 Correct 26 ms 24312 KB Output is correct
43 Correct 27 ms 24444 KB Output is correct
44 Correct 23 ms 23928 KB Output is correct
45 Correct 26 ms 24284 KB Output is correct
46 Correct 26 ms 24276 KB Output is correct
47 Correct 23 ms 23800 KB Output is correct
48 Correct 26 ms 24184 KB Output is correct
49 Correct 26 ms 24312 KB Output is correct
50 Correct 26 ms 24312 KB Output is correct
51 Correct 27 ms 24312 KB Output is correct
52 Correct 26 ms 24312 KB Output is correct
53 Correct 27 ms 24312 KB Output is correct
54 Correct 27 ms 24184 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23804 KB Output is correct
2 Correct 24 ms 23928 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 23 ms 23800 KB Output is correct
5 Correct 24 ms 23800 KB Output is correct
6 Correct 23 ms 23928 KB Output is correct
7 Correct 24 ms 23800 KB Output is correct
8 Correct 24 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 28 ms 23800 KB Output is correct
12 Correct 29 ms 23800 KB Output is correct
13 Correct 25 ms 23800 KB Output is correct
14 Correct 23 ms 23800 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 23 ms 23812 KB Output is correct
17 Correct 23 ms 23800 KB Output is correct
18 Correct 23 ms 23820 KB Output is correct
19 Correct 24 ms 23772 KB Output is correct
20 Correct 24 ms 23800 KB Output is correct
21 Correct 23 ms 23804 KB Output is correct
22 Correct 24 ms 23928 KB Output is correct
23 Correct 23 ms 23800 KB Output is correct
24 Correct 23 ms 23928 KB Output is correct
25 Correct 23 ms 23800 KB Output is correct
26 Correct 132 ms 37732 KB Output is correct
27 Correct 188 ms 37524 KB Output is correct
28 Correct 26 ms 24204 KB Output is correct
29 Correct 23 ms 23800 KB Output is correct
30 Correct 23 ms 23800 KB Output is correct
31 Correct 172 ms 37288 KB Output is correct
32 Correct 26 ms 24368 KB Output is correct
33 Correct 279 ms 44544 KB Output is correct
34 Correct 182 ms 37440 KB Output is correct
35 Correct 26 ms 24312 KB Output is correct
36 Correct 211 ms 37868 KB Output is correct
37 Correct 27 ms 24188 KB Output is correct
38 Correct 27 ms 24312 KB Output is correct
39 Correct 139 ms 37736 KB Output is correct
40 Correct 27 ms 24440 KB Output is correct
41 Correct 178 ms 37788 KB Output is correct
42 Correct 262 ms 40528 KB Output is correct
43 Correct 23 ms 23804 KB Output is correct
44 Correct 291 ms 45324 KB Output is correct
45 Correct 237 ms 41192 KB Output is correct
46 Correct 26 ms 24312 KB Output is correct
47 Correct 26 ms 24184 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 131 ms 37740 KB Output is correct
2 Correct 136 ms 39908 KB Output is correct
3 Correct 27 ms 24312 KB Output is correct
4 Correct 27 ms 24300 KB Output is correct
5 Correct 24 ms 23928 KB Output is correct
6 Correct 23 ms 23800 KB Output is correct
7 Correct 31 ms 24312 KB Output is correct
8 Correct 191 ms 38504 KB Output is correct
9 Correct 26 ms 24312 KB Output is correct
10 Correct 167 ms 37484 KB Output is correct
11 Correct 23 ms 23928 KB Output is correct
12 Correct 202 ms 37324 KB Output is correct
13 Correct 181 ms 38508 KB Output is correct
14 Correct 162 ms 40044 KB Output is correct
15 Correct 164 ms 37736 KB Output is correct
16 Correct 26 ms 24316 KB Output is correct
17 Correct 23 ms 23928 KB Output is correct
18 Correct 146 ms 39916 KB Output is correct
19 Correct 186 ms 43176 KB Output is correct
20 Correct 26 ms 24312 KB Output is correct
21 Correct 23 ms 23800 KB Output is correct
22 Correct 145 ms 38728 KB Output is correct
23 Correct 26 ms 24312 KB Output is correct
24 Correct 196 ms 37740 KB Output is correct
25 Correct 171 ms 42112 KB Output is correct
26 Correct 26 ms 24312 KB Output is correct
27 Correct 26 ms 24312 KB Output is correct
28 Correct 26 ms 24184 KB Output is correct
29 Correct 26 ms 24312 KB Output is correct
30 Correct 26 ms 24316 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23804 KB Output is correct
2 Correct 24 ms 23928 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 23 ms 23800 KB Output is correct
5 Correct 24 ms 23800 KB Output is correct
6 Correct 23 ms 23928 KB Output is correct
7 Correct 24 ms 23800 KB Output is correct
8 Correct 24 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 28 ms 23800 KB Output is correct
12 Correct 29 ms 23800 KB Output is correct
13 Correct 25 ms 23800 KB Output is correct
14 Correct 23 ms 23800 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 23 ms 23812 KB Output is correct
17 Correct 23 ms 23800 KB Output is correct
18 Correct 23 ms 23820 KB Output is correct
19 Correct 24 ms 23772 KB Output is correct
20 Correct 24 ms 23800 KB Output is correct
21 Correct 23 ms 23804 KB Output is correct
22 Correct 24 ms 23928 KB Output is correct
23 Correct 23 ms 23800 KB Output is correct
24 Correct 23 ms 23928 KB Output is correct
25 Correct 23 ms 23800 KB Output is correct
26 Correct 26 ms 24312 KB Output is correct
27 Correct 26 ms 24284 KB Output is correct
28 Correct 26 ms 24432 KB Output is correct
29 Correct 26 ms 24252 KB Output is correct
30 Correct 27 ms 24312 KB Output is correct
31 Correct 24 ms 23928 KB Output is correct
32 Correct 28 ms 24440 KB Output is correct
33 Correct 25 ms 23800 KB Output is correct
34 Correct 26 ms 24312 KB Output is correct
35 Correct 26 ms 24312 KB Output is correct
36 Correct 26 ms 24312 KB Output is correct
37 Correct 26 ms 24312 KB Output is correct
38 Correct 23 ms 23928 KB Output is correct
39 Correct 27 ms 24312 KB Output is correct
40 Correct 26 ms 24184 KB Output is correct
41 Correct 26 ms 24184 KB Output is correct
42 Correct 26 ms 24312 KB Output is correct
43 Correct 27 ms 24444 KB Output is correct
44 Correct 23 ms 23928 KB Output is correct
45 Correct 26 ms 24284 KB Output is correct
46 Correct 26 ms 24276 KB Output is correct
47 Correct 23 ms 23800 KB Output is correct
48 Correct 26 ms 24184 KB Output is correct
49 Correct 26 ms 24312 KB Output is correct
50 Correct 26 ms 24312 KB Output is correct
51 Correct 27 ms 24312 KB Output is correct
52 Correct 26 ms 24312 KB Output is correct
53 Correct 27 ms 24312 KB Output is correct
54 Correct 27 ms 24184 KB Output is correct
55 Correct 23 ms 23800 KB Output is correct
56 Correct 132 ms 37732 KB Output is correct
57 Correct 188 ms 37524 KB Output is correct
58 Correct 26 ms 24204 KB Output is correct
59 Correct 23 ms 23800 KB Output is correct
60 Correct 23 ms 23800 KB Output is correct
61 Correct 172 ms 37288 KB Output is correct
62 Correct 26 ms 24368 KB Output is correct
63 Correct 279 ms 44544 KB Output is correct
64 Correct 182 ms 37440 KB Output is correct
65 Correct 26 ms 24312 KB Output is correct
66 Correct 211 ms 37868 KB Output is correct
67 Correct 27 ms 24188 KB Output is correct
68 Correct 27 ms 24312 KB Output is correct
69 Correct 139 ms 37736 KB Output is correct
70 Correct 27 ms 24440 KB Output is correct
71 Correct 178 ms 37788 KB Output is correct
72 Correct 262 ms 40528 KB Output is correct
73 Correct 23 ms 23804 KB Output is correct
74 Correct 291 ms 45324 KB Output is correct
75 Correct 237 ms 41192 KB Output is correct
76 Correct 26 ms 24312 KB Output is correct
77 Correct 26 ms 24184 KB Output is correct
78 Correct 131 ms 37740 KB Output is correct
79 Correct 136 ms 39908 KB Output is correct
80 Correct 27 ms 24312 KB Output is correct
81 Correct 27 ms 24300 KB Output is correct
82 Correct 24 ms 23928 KB Output is correct
83 Correct 23 ms 23800 KB Output is correct
84 Correct 31 ms 24312 KB Output is correct
85 Correct 191 ms 38504 KB Output is correct
86 Correct 26 ms 24312 KB Output is correct
87 Correct 167 ms 37484 KB Output is correct
88 Correct 23 ms 23928 KB Output is correct
89 Correct 202 ms 37324 KB Output is correct
90 Correct 181 ms 38508 KB Output is correct
91 Correct 162 ms 40044 KB Output is correct
92 Correct 164 ms 37736 KB Output is correct
93 Correct 26 ms 24316 KB Output is correct
94 Correct 23 ms 23928 KB Output is correct
95 Correct 146 ms 39916 KB Output is correct
96 Correct 186 ms 43176 KB Output is correct
97 Correct 26 ms 24312 KB Output is correct
98 Correct 23 ms 23800 KB Output is correct
99 Correct 145 ms 38728 KB Output is correct
100 Correct 26 ms 24312 KB Output is correct
101 Correct 196 ms 37740 KB Output is correct
102 Correct 171 ms 42112 KB Output is correct
103 Correct 26 ms 24312 KB Output is correct
104 Correct 26 ms 24312 KB Output is correct
105 Correct 26 ms 24184 KB Output is correct
106 Correct 26 ms 24312 KB Output is correct
107 Correct 26 ms 24316 KB Output is correct
108 Correct 843 ms 97028 KB Output is correct
109 Correct 2021 ms 110640 KB Output is correct
110 Correct 2041 ms 122300 KB Output is correct
111 Correct 1238 ms 123016 KB Output is correct
112 Correct 1194 ms 116572 KB Output is correct
113 Correct 851 ms 104912 KB Output is correct
114 Correct 1100 ms 93604 KB Output is correct
115 Correct 1107 ms 94200 KB Output is correct
116 Correct 1286 ms 95072 KB Output is correct
117 Correct 984 ms 105880 KB Output is correct
118 Correct 1066 ms 92208 KB Output is correct
119 Correct 976 ms 105896 KB Output is correct
120 Correct 1203 ms 117100 KB Output is correct
121 Correct 986 ms 105948 KB Output is correct
122 Correct 1167 ms 99732 KB Output is correct
123 Correct 714 ms 105380 KB Output is correct
124 Correct 1097 ms 104284 KB Output is correct