oj.uz

Submission #694210

# Submission time Handle Problem Language Result Execution time Memory
694210 2023-02-04T03:38:56 Z Do_you_copy Mergers (JOI19_mergers) C++17
100 / 100
 1302 ms 155652 KB 
//Then
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);

using namespace std;
using ll = long long;
using ld = long double;
using pii = pair <int, int>;
mt19937_64 Rand(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 5e5 + 1;
//const int Mod = 1e9 + 7;
//const int inf =
int n, k;
int id[maxN];
int lab[maxN];
vector <int> S[maxN];
int sum[maxN];
pii e[maxN];
vector <int> adj[maxN], adj1[maxN];
int depth[maxN], lift[maxN][20];
int find_set(int u){
    return lab[u] < 0 ? u : lab[u] = find_set(lab[u]);
}

bool unite(int u, int v){
    u = find_set(u);
    v = find_set(v);
    if (u == v) return 0;
    lab[u] += lab[v];
    lab[v] = u;
    return 1;
}

inline int lca(int u, int v){
    if (depth[u] < depth[v]) swap(u, v);
    int k = depth[u] - depth[v];
    while (k){
        int t = __lg(k);
        u = lift[u][t];
        k ^= 1 << t;
    }
    if (u == v) return u;
    for (int i = 19; i >= 0; --i){
        if (lift[u][i] == lift[v][i]) continue;
        u = lift[u][i];
        v = lift[v][i];
    }
    return lift[u][0];
}

void dfs(int u, int p){
    depth[u] = depth[p] + 1;
    lift[u][0] = p;
    for (int i = 1; i < 20; ++i) lift[u][i] = lift[lift[u][i - 1]][i - 1];
    for (int i: adj[u]){
        if (i == p) continue;
        dfs(i, u);
    }
}

void dfs1(int u, int p){
    for (int i: adj[u]){
        if (i == p) continue;
        dfs1(i, u);
        sum[u] += sum[i];
    }
    if (sum[u] < 0){
        unite(id[u], id[p]);
    }
}

int leaf;
void dfs2(int u, int p){
    if (adj1[u].size() == 1) ++leaf;
    for (int i: adj1[u]){
        if (i == p) continue;
        dfs2(i, u);
    }
}

void Init(){
    cin >> n >> k;
    for (int i = 1; i < n; ++i){
        int u, v;
        cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
        e[i] = {u, v};
    }
    for (int i = 1; i <= n; ++i){
        cin >> id[i];
        S[id[i]].pb(i);
    }
    fill(lab + 1, lab + n + 1, -1);
    dfs(1, 0);
    for (int i = 1; i <= k; ++i){
        int root = S[i][0];
        for (int j = 1; j < signed(S[i].size()); ++j){
            root = lca(root, S[i][j]);
        }
        for (int j: S[i]){
            --sum[j];
        }
        sum[root] += S[i].size();
    }
    dfs1(1, 0);
    for (int i = 1; i < n; ++i){
        int u = find_set(id[e[i].fi]);
        int v = find_set(id[e[i].se]);
        if (u == v) continue;
        adj1[u].pb(v);
        adj1[v].pb(u);
    }
    for (int i = 1; i <= k; ++i){
        if (adj1[i].size()){
            dfs2(i, 0);
            break;
        }
    }
    cout << (leaf + 1) / 2;
}

#define debug
#define taskname "test"
signed main(){
    faster
    if (fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }
    int tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
    if (fopen("timeout.txt", "r")){
        ofstream timeout("timeout.txt");
        timeout << signed(double(clock()) / CLOCKS_PER_SEC * 1000);
        timeout.close();
        #ifndef debug
        cerr << "Time elapsed: " << signed(double(clock()) / CLOCKS_PER_SEC * 1000) << "ms\n";
        #endif // debug
    }
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:131:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  131 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
mergers.cpp:132:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  132 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 35540 KB Output is correct
2 Correct 19 ms 35540 KB Output is correct
3 Correct 21 ms 35540 KB Output is correct
4 Correct 19 ms 35540 KB Output is correct
5 Correct 19 ms 35504 KB Output is correct
6 Correct 18 ms 35572 KB Output is correct
7 Correct 29 ms 35540 KB Output is correct
8 Correct 18 ms 35520 KB Output is correct
9 Correct 19 ms 35588 KB Output is correct
10 Correct 18 ms 35484 KB Output is correct
11 Correct 17 ms 35540 KB Output is correct
12 Correct 17 ms 35540 KB Output is correct
13 Correct 17 ms 35540 KB Output is correct
14 Correct 18 ms 35572 KB Output is correct
15 Correct 19 ms 35540 KB Output is correct
16 Correct 20 ms 35540 KB Output is correct
17 Correct 19 ms 35540 KB Output is correct
18 Correct 17 ms 35540 KB Output is correct
19 Correct 17 ms 35540 KB Output is correct
20 Correct 18 ms 35572 KB Output is correct
21 Correct 17 ms 35540 KB Output is correct
22 Correct 18 ms 35572 KB Output is correct
23 Correct 18 ms 35532 KB Output is correct
24 Correct 26 ms 35572 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 35540 KB Output is correct
2 Correct 19 ms 35540 KB Output is correct
3 Correct 21 ms 35540 KB Output is correct
4 Correct 19 ms 35540 KB Output is correct
5 Correct 19 ms 35504 KB Output is correct
6 Correct 18 ms 35572 KB Output is correct
7 Correct 29 ms 35540 KB Output is correct
8 Correct 18 ms 35520 KB Output is correct
9 Correct 19 ms 35588 KB Output is correct
10 Correct 18 ms 35484 KB Output is correct
11 Correct 17 ms 35540 KB Output is correct
12 Correct 17 ms 35540 KB Output is correct
13 Correct 17 ms 35540 KB Output is correct
14 Correct 18 ms 35572 KB Output is correct
15 Correct 19 ms 35540 KB Output is correct
16 Correct 20 ms 35540 KB Output is correct
17 Correct 19 ms 35540 KB Output is correct
18 Correct 17 ms 35540 KB Output is correct
19 Correct 17 ms 35540 KB Output is correct
20 Correct 18 ms 35572 KB Output is correct
21 Correct 17 ms 35540 KB Output is correct
22 Correct 18 ms 35572 KB Output is correct
23 Correct 18 ms 35532 KB Output is correct
24 Correct 26 ms 35572 KB Output is correct
25 Correct 18 ms 35604 KB Output is correct
26 Correct 21 ms 36052 KB Output is correct
27 Correct 23 ms 35968 KB Output is correct
28 Correct 74 ms 36244 KB Output is correct
29 Correct 20 ms 36144 KB Output is correct
30 Correct 19 ms 35924 KB Output is correct
31 Correct 17 ms 35492 KB Output is correct
32 Correct 26 ms 36236 KB Output is correct
33 Correct 23 ms 35516 KB Output is correct
34 Correct 21 ms 35960 KB Output is correct
35 Correct 22 ms 36180 KB Output is correct
36 Correct 22 ms 35924 KB Output is correct
37 Correct 20 ms 36052 KB Output is correct
38 Correct 41 ms 35532 KB Output is correct
39 Correct 18 ms 36052 KB Output is correct
40 Correct 18 ms 35932 KB Output is correct
41 Correct 18 ms 35924 KB Output is correct
42 Correct 19 ms 36052 KB Output is correct
43 Correct 18 ms 36180 KB Output is correct
44 Correct 17 ms 35512 KB Output is correct
45 Correct 24 ms 36052 KB Output is correct
46 Correct 20 ms 36060 KB Output is correct
47 Correct 18 ms 35552 KB Output is correct
48 Correct 20 ms 35924 KB Output is correct
49 Correct 19 ms 36108 KB Output is correct
50 Correct 18 ms 36196 KB Output is correct
51 Correct 19 ms 35904 KB Output is correct
52 Correct 22 ms 35924 KB Output is correct
53 Correct 22 ms 36024 KB Output is correct
54 Correct 23 ms 35992 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 35540 KB Output is correct
2 Correct 19 ms 35540 KB Output is correct
3 Correct 21 ms 35540 KB Output is correct
4 Correct 19 ms 35540 KB Output is correct
5 Correct 19 ms 35504 KB Output is correct
6 Correct 18 ms 35572 KB Output is correct
7 Correct 29 ms 35540 KB Output is correct
8 Correct 18 ms 35520 KB Output is correct
9 Correct 19 ms 35588 KB Output is correct
10 Correct 18 ms 35484 KB Output is correct
11 Correct 17 ms 35540 KB Output is correct
12 Correct 17 ms 35540 KB Output is correct
13 Correct 17 ms 35540 KB Output is correct
14 Correct 18 ms 35572 KB Output is correct
15 Correct 19 ms 35540 KB Output is correct
16 Correct 20 ms 35540 KB Output is correct
17 Correct 19 ms 35540 KB Output is correct
18 Correct 17 ms 35540 KB Output is correct
19 Correct 17 ms 35540 KB Output is correct
20 Correct 18 ms 35572 KB Output is correct
21 Correct 17 ms 35540 KB Output is correct
22 Correct 18 ms 35572 KB Output is correct
23 Correct 18 ms 35532 KB Output is correct
24 Correct 26 ms 35572 KB Output is correct
25 Correct 17 ms 35540 KB Output is correct
26 Correct 92 ms 49764 KB Output is correct
27 Correct 116 ms 49456 KB Output is correct
28 Correct 26 ms 35924 KB Output is correct
29 Correct 17 ms 35540 KB Output is correct
30 Correct 17 ms 35548 KB Output is correct
31 Correct 109 ms 49460 KB Output is correct
32 Correct 21 ms 35924 KB Output is correct
33 Correct 131 ms 56636 KB Output is correct
34 Correct 122 ms 49688 KB Output is correct
35 Correct 20 ms 35924 KB Output is correct
36 Correct 152 ms 50216 KB Output is correct
37 Correct 39 ms 35908 KB Output is correct
38 Correct 20 ms 36012 KB Output is correct
39 Correct 79 ms 49832 KB Output is correct
40 Correct 20 ms 36144 KB Output is correct
41 Correct 93 ms 49512 KB Output is correct
42 Correct 154 ms 51876 KB Output is correct
43 Correct 19 ms 35540 KB Output is correct
44 Correct 124 ms 56980 KB Output is correct
45 Correct 125 ms 53176 KB Output is correct
46 Correct 19 ms 35924 KB Output is correct
47 Correct 20 ms 35944 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 49856 KB Output is correct
2 Correct 109 ms 55860 KB Output is correct
3 Correct 22 ms 36052 KB Output is correct
4 Correct 20 ms 35964 KB Output is correct
5 Correct 18 ms 35564 KB Output is correct
6 Correct 18 ms 35540 KB Output is correct
7 Correct 19 ms 35952 KB Output is correct
8 Correct 126 ms 50952 KB Output is correct
9 Correct 20 ms 36016 KB Output is correct
10 Correct 95 ms 49552 KB Output is correct
11 Correct 20 ms 35520 KB Output is correct
12 Correct 130 ms 49612 KB Output is correct
13 Correct 112 ms 51124 KB Output is correct
14 Correct 139 ms 55244 KB Output is correct
15 Correct 80 ms 49740 KB Output is correct
16 Correct 20 ms 36052 KB Output is correct
17 Correct 18 ms 35608 KB Output is correct
18 Correct 96 ms 54908 KB Output is correct
19 Correct 158 ms 59420 KB Output is correct
20 Correct 18 ms 36024 KB Output is correct
21 Correct 30 ms 35540 KB Output is correct
22 Correct 101 ms 51536 KB Output is correct
23 Correct 21 ms 35928 KB Output is correct
24 Correct 138 ms 49940 KB Output is correct
25 Correct 135 ms 57832 KB Output is correct
26 Correct 19 ms 36212 KB Output is correct
27 Correct 20 ms 36184 KB Output is correct
28 Correct 19 ms 35924 KB Output is correct
29 Correct 19 ms 35924 KB Output is correct
30 Correct 19 ms 36052 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 35540 KB Output is correct
2 Correct 19 ms 35540 KB Output is correct
3 Correct 21 ms 35540 KB Output is correct
4 Correct 19 ms 35540 KB Output is correct
5 Correct 19 ms 35504 KB Output is correct
6 Correct 18 ms 35572 KB Output is correct
7 Correct 29 ms 35540 KB Output is correct
8 Correct 18 ms 35520 KB Output is correct
9 Correct 19 ms 35588 KB Output is correct
10 Correct 18 ms 35484 KB Output is correct
11 Correct 17 ms 35540 KB Output is correct
12 Correct 17 ms 35540 KB Output is correct
13 Correct 17 ms 35540 KB Output is correct
14 Correct 18 ms 35572 KB Output is correct
15 Correct 19 ms 35540 KB Output is correct
16 Correct 20 ms 35540 KB Output is correct
17 Correct 19 ms 35540 KB Output is correct
18 Correct 17 ms 35540 KB Output is correct
19 Correct 17 ms 35540 KB Output is correct
20 Correct 18 ms 35572 KB Output is correct
21 Correct 17 ms 35540 KB Output is correct
22 Correct 18 ms 35572 KB Output is correct
23 Correct 18 ms 35532 KB Output is correct
24 Correct 26 ms 35572 KB Output is correct
25 Correct 18 ms 35604 KB Output is correct
26 Correct 21 ms 36052 KB Output is correct
27 Correct 23 ms 35968 KB Output is correct
28 Correct 74 ms 36244 KB Output is correct
29 Correct 20 ms 36144 KB Output is correct
30 Correct 19 ms 35924 KB Output is correct
31 Correct 17 ms 35492 KB Output is correct
32 Correct 26 ms 36236 KB Output is correct
33 Correct 23 ms 35516 KB Output is correct
34 Correct 21 ms 35960 KB Output is correct
35 Correct 22 ms 36180 KB Output is correct
36 Correct 22 ms 35924 KB Output is correct
37 Correct 20 ms 36052 KB Output is correct
38 Correct 41 ms 35532 KB Output is correct
39 Correct 18 ms 36052 KB Output is correct
40 Correct 18 ms 35932 KB Output is correct
41 Correct 18 ms 35924 KB Output is correct
42 Correct 19 ms 36052 KB Output is correct
43 Correct 18 ms 36180 KB Output is correct
44 Correct 17 ms 35512 KB Output is correct
45 Correct 24 ms 36052 KB Output is correct
46 Correct 20 ms 36060 KB Output is correct
47 Correct 18 ms 35552 KB Output is correct
48 Correct 20 ms 35924 KB Output is correct
49 Correct 19 ms 36108 KB Output is correct
50 Correct 18 ms 36196 KB Output is correct
51 Correct 19 ms 35904 KB Output is correct
52 Correct 22 ms 35924 KB Output is correct
53 Correct 22 ms 36024 KB Output is correct
54 Correct 23 ms 35992 KB Output is correct
55 Correct 17 ms 35540 KB Output is correct
56 Correct 92 ms 49764 KB Output is correct
57 Correct 116 ms 49456 KB Output is correct
58 Correct 26 ms 35924 KB Output is correct
59 Correct 17 ms 35540 KB Output is correct
60 Correct 17 ms 35548 KB Output is correct
61 Correct 109 ms 49460 KB Output is correct
62 Correct 21 ms 35924 KB Output is correct
63 Correct 131 ms 56636 KB Output is correct
64 Correct 122 ms 49688 KB Output is correct
65 Correct 20 ms 35924 KB Output is correct
66 Correct 152 ms 50216 KB Output is correct
67 Correct 39 ms 35908 KB Output is correct
68 Correct 20 ms 36012 KB Output is correct
69 Correct 79 ms 49832 KB Output is correct
70 Correct 20 ms 36144 KB Output is correct
71 Correct 93 ms 49512 KB Output is correct
72 Correct 154 ms 51876 KB Output is correct
73 Correct 19 ms 35540 KB Output is correct
74 Correct 124 ms 56980 KB Output is correct
75 Correct 125 ms 53176 KB Output is correct
76 Correct 19 ms 35924 KB Output is correct
77 Correct 20 ms 35944 KB Output is correct
78 Correct 74 ms 49856 KB Output is correct
79 Correct 109 ms 55860 KB Output is correct
80 Correct 22 ms 36052 KB Output is correct
81 Correct 20 ms 35964 KB Output is correct
82 Correct 18 ms 35564 KB Output is correct
83 Correct 18 ms 35540 KB Output is correct
84 Correct 19 ms 35952 KB Output is correct
85 Correct 126 ms 50952 KB Output is correct
86 Correct 20 ms 36016 KB Output is correct
87 Correct 95 ms 49552 KB Output is correct
88 Correct 20 ms 35520 KB Output is correct
89 Correct 130 ms 49612 KB Output is correct
90 Correct 112 ms 51124 KB Output is correct
91 Correct 139 ms 55244 KB Output is correct
92 Correct 80 ms 49740 KB Output is correct
93 Correct 20 ms 36052 KB Output is correct
94 Correct 18 ms 35608 KB Output is correct
95 Correct 96 ms 54908 KB Output is correct
96 Correct 158 ms 59420 KB Output is correct
97 Correct 18 ms 36024 KB Output is correct
98 Correct 30 ms 35540 KB Output is correct
99 Correct 101 ms 51536 KB Output is correct
100 Correct 21 ms 35928 KB Output is correct
101 Correct 138 ms 49940 KB Output is correct
102 Correct 135 ms 57832 KB Output is correct
103 Correct 19 ms 36212 KB Output is correct
104 Correct 20 ms 36184 KB Output is correct
105 Correct 19 ms 35924 KB Output is correct
106 Correct 19 ms 35924 KB Output is correct
107 Correct 19 ms 36052 KB Output is correct
108 Correct 554 ms 112044 KB Output is correct
109 Correct 1082 ms 122708 KB Output is correct
110 Correct 806 ms 133816 KB Output is correct
111 Correct 1302 ms 155652 KB Output is correct
112 Correct 1042 ms 141096 KB Output is correct
113 Correct 703 ms 132632 KB Output is correct
114 Correct 599 ms 105108 KB Output is correct
115 Correct 572 ms 105184 KB Output is correct
116 Correct 736 ms 107836 KB Output is correct
117 Correct 981 ms 134936 KB Output is correct
118 Correct 636 ms 104768 KB Output is correct
119 Correct 1008 ms 134688 KB Output is correct
120 Correct 1159 ms 147996 KB Output is correct
121 Correct 960 ms 134492 KB Output is correct
122 Correct 831 ms 115156 KB Output is correct
123 Correct 665 ms 137300 KB Output is correct
124 Correct 1057 ms 126508 KB Output is correct