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답안 #667474

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
667474 2022-12-01T13:43:15 Z Soul234 Mergers (JOI19_mergers) C++14
100 / 100
 562 ms 95588 KB 
#include<bits/stdc++.h>
using namespace std;

void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
    cerr << h; if(sizeof...(t)) cerr << ", ";
    DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL

#define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--)
#define R0F(i,a) ROF(i,0,a)
#define each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pb push_back
#define tcT template<class T
#define nl "\n"
#define fi first
#define se second

using ll = long long;
using vi = vector<int>;
using pi = pair<int,int>;
using str = string;
using db = long double;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;

void setIO(string NAME = "") {
    cin.tie(0)->sync_with_stdio(0);
    if(sz(NAME)) {
        freopen((NAME + ".inp").c_str(),"r",stdin);
        freopen((NAME + ".out").c_str(),"w",stdout);
    }
}

tcT> bool ckmin(T&a, const T&b) {
    return b < a ? a=b,1 : 0; }
tcT> bool ckmax(T&a, const T&b) {
    return b > a ? a=b,1 : 0; }

const int MOD = 1e9 + 7;
const ll INF = 1e18;

struct DSU {
    vi e;
    void init(int N) {
        e.assign(N, -1);
    }
    int find(int x) { return e[x] < 0 ? x : e[x] = find(e[x]); }
    bool join(int a, int b) {
        a = find(a), b = find(b);
        if(a == b) return false;
        e[b] = a;
        return true;
    }
} dsu;

const int MX = 5e5+5;

int N, K;
vi adj[MX];

int par[MX], dep[MX];

void dfs(int u, int p) {
    each(v, adj[u]) if(v != p) {
        dep[v] = dep[u] + 1;
        par[v] = u;
        dfs(v, u);
    }
}

void mergecc(int a, int b) {
    a = dsu.find(a), b = dsu.find(b);
    while(a != b) {
        if(dep[a] < dep[b]) swap(a,b);
        dsu.join(par[a], a);
        a = dsu.find(par[a]);
    }
}

vi lst[MX];

pi eds[MX];

int deg[MX];

void solve() {
    cin >> N >> K;
    dsu.init(N+5);
    F0R(i, N-1) {
        int u, v;
        cin >> u >> v;
        eds[i] = {u, v};
        adj[u].pb(v);
        adj[v].pb(u);
    }
    dfs(1, -1);
    FOR(i,1,N+1) {
        int col;
        cin >> col;
        lst[col].pb(i);
    }
    FOR(i,1,K+1) {
        FOR(j,1,sz(lst[i])) {
            mergecc(lst[i][0], lst[i][j]);
        }
    }

    F0R(i, N-1) {
        int u = dsu.find(eds[i].fi), v = dsu.find(eds[i].se);
        if(u != v) {
            deg[u]++;
            deg[v]++;
        }
    }
    int ans = 0;
    FOR(i,1,N+1) if(dsu.find(i) == i && deg[i] == 1) ans++;
    cout << (ans+1)/2 << nl;
}

int main() {
    setIO();

    int t=1;
    //cin>>t;
    while(t-->0) {
        solve();
    }

    return 0;
}

Compilation message

mergers.cpp: In function 'void setIO(std::string)':
mergers.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mergers.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23832 KB Output is correct
2 Correct 13 ms 23764 KB Output is correct
3 Correct 13 ms 23816 KB Output is correct
4 Correct 12 ms 23804 KB Output is correct
5 Correct 12 ms 23824 KB Output is correct
6 Correct 13 ms 23820 KB Output is correct
7 Correct 13 ms 23804 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 13 ms 23764 KB Output is correct
10 Correct 15 ms 23728 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23764 KB Output is correct
13 Correct 14 ms 23824 KB Output is correct
14 Correct 13 ms 23820 KB Output is correct
15 Correct 12 ms 23764 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23820 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 12 ms 23764 KB Output is correct
20 Correct 12 ms 23764 KB Output is correct
21 Correct 12 ms 23764 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 12 ms 23820 KB Output is correct
24 Correct 12 ms 23764 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23832 KB Output is correct
2 Correct 13 ms 23764 KB Output is correct
3 Correct 13 ms 23816 KB Output is correct
4 Correct 12 ms 23804 KB Output is correct
5 Correct 12 ms 23824 KB Output is correct
6 Correct 13 ms 23820 KB Output is correct
7 Correct 13 ms 23804 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 13 ms 23764 KB Output is correct
10 Correct 15 ms 23728 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23764 KB Output is correct
13 Correct 14 ms 23824 KB Output is correct
14 Correct 13 ms 23820 KB Output is correct
15 Correct 12 ms 23764 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23820 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 12 ms 23764 KB Output is correct
20 Correct 12 ms 23764 KB Output is correct
21 Correct 12 ms 23764 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 12 ms 23820 KB Output is correct
24 Correct 12 ms 23764 KB Output is correct
25 Correct 12 ms 23816 KB Output is correct
26 Correct 14 ms 23996 KB Output is correct
27 Correct 14 ms 24020 KB Output is correct
28 Correct 14 ms 24116 KB Output is correct
29 Correct 14 ms 24100 KB Output is correct
30 Correct 14 ms 24064 KB Output is correct
31 Correct 13 ms 23764 KB Output is correct
32 Correct 14 ms 24148 KB Output is correct
33 Correct 14 ms 23784 KB Output is correct
34 Correct 14 ms 24020 KB Output is correct
35 Correct 14 ms 24020 KB Output is correct
36 Correct 15 ms 24020 KB Output is correct
37 Correct 15 ms 24112 KB Output is correct
38 Correct 14 ms 23828 KB Output is correct
39 Correct 14 ms 24076 KB Output is correct
40 Correct 13 ms 23956 KB Output is correct
41 Correct 13 ms 24060 KB Output is correct
42 Correct 14 ms 24044 KB Output is correct
43 Correct 14 ms 24148 KB Output is correct
44 Correct 13 ms 23816 KB Output is correct
45 Correct 14 ms 24076 KB Output is correct
46 Correct 15 ms 24020 KB Output is correct
47 Correct 14 ms 23820 KB Output is correct
48 Correct 14 ms 24148 KB Output is correct
49 Correct 14 ms 24088 KB Output is correct
50 Correct 14 ms 24080 KB Output is correct
51 Correct 14 ms 23960 KB Output is correct
52 Correct 13 ms 24020 KB Output is correct
53 Correct 14 ms 24024 KB Output is correct
54 Correct 14 ms 24052 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23832 KB Output is correct
2 Correct 13 ms 23764 KB Output is correct
3 Correct 13 ms 23816 KB Output is correct
4 Correct 12 ms 23804 KB Output is correct
5 Correct 12 ms 23824 KB Output is correct
6 Correct 13 ms 23820 KB Output is correct
7 Correct 13 ms 23804 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 13 ms 23764 KB Output is correct
10 Correct 15 ms 23728 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23764 KB Output is correct
13 Correct 14 ms 23824 KB Output is correct
14 Correct 13 ms 23820 KB Output is correct
15 Correct 12 ms 23764 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23820 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 12 ms 23764 KB Output is correct
20 Correct 12 ms 23764 KB Output is correct
21 Correct 12 ms 23764 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 12 ms 23820 KB Output is correct
24 Correct 12 ms 23764 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct
26 Correct 53 ms 31276 KB Output is correct
27 Correct 58 ms 31052 KB Output is correct
28 Correct 14 ms 24020 KB Output is correct
29 Correct 13 ms 23764 KB Output is correct
30 Correct 13 ms 23792 KB Output is correct
31 Correct 61 ms 31068 KB Output is correct
32 Correct 14 ms 23996 KB Output is correct
33 Correct 66 ms 36684 KB Output is correct
34 Correct 61 ms 31052 KB Output is correct
35 Correct 15 ms 23952 KB Output is correct
36 Correct 71 ms 31744 KB Output is correct
37 Correct 14 ms 23956 KB Output is correct
38 Correct 15 ms 23972 KB Output is correct
39 Correct 53 ms 31172 KB Output is correct
40 Correct 14 ms 24188 KB Output is correct
41 Correct 61 ms 30956 KB Output is correct
42 Correct 63 ms 32784 KB Output is correct
43 Correct 13 ms 23764 KB Output is correct
44 Correct 75 ms 37004 KB Output is correct
45 Correct 67 ms 33908 KB Output is correct
46 Correct 15 ms 24020 KB Output is correct
47 Correct 16 ms 24012 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 29768 KB Output is correct
2 Correct 69 ms 32772 KB Output is correct
3 Correct 14 ms 24020 KB Output is correct
4 Correct 15 ms 24060 KB Output is correct
5 Correct 13 ms 23816 KB Output is correct
6 Correct 13 ms 23812 KB Output is correct
7 Correct 15 ms 23960 KB Output is correct
8 Correct 80 ms 32656 KB Output is correct
9 Correct 14 ms 24020 KB Output is correct
10 Correct 72 ms 31440 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 64 ms 31412 KB Output is correct
13 Correct 92 ms 32568 KB Output is correct
14 Correct 78 ms 34256 KB Output is correct
15 Correct 51 ms 31216 KB Output is correct
16 Correct 14 ms 24104 KB Output is correct
17 Correct 13 ms 23764 KB Output is correct
18 Correct 68 ms 34208 KB Output is correct
19 Correct 91 ms 37300 KB Output is correct
20 Correct 15 ms 24060 KB Output is correct
21 Correct 14 ms 23764 KB Output is correct
22 Correct 58 ms 32816 KB Output is correct
23 Correct 13 ms 24020 KB Output is correct
24 Correct 79 ms 31852 KB Output is correct
25 Correct 110 ms 36268 KB Output is correct
26 Correct 15 ms 24084 KB Output is correct
27 Correct 15 ms 24064 KB Output is correct
28 Correct 14 ms 24020 KB Output is correct
29 Correct 15 ms 24020 KB Output is correct
30 Correct 15 ms 24052 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23832 KB Output is correct
2 Correct 13 ms 23764 KB Output is correct
3 Correct 13 ms 23816 KB Output is correct
4 Correct 12 ms 23804 KB Output is correct
5 Correct 12 ms 23824 KB Output is correct
6 Correct 13 ms 23820 KB Output is correct
7 Correct 13 ms 23804 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 13 ms 23764 KB Output is correct
10 Correct 15 ms 23728 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23764 KB Output is correct
13 Correct 14 ms 23824 KB Output is correct
14 Correct 13 ms 23820 KB Output is correct
15 Correct 12 ms 23764 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23820 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 12 ms 23764 KB Output is correct
20 Correct 12 ms 23764 KB Output is correct
21 Correct 12 ms 23764 KB Output is correct
22 Correct 14 ms 23764 KB Output is correct
23 Correct 12 ms 23820 KB Output is correct
24 Correct 12 ms 23764 KB Output is correct
25 Correct 12 ms 23816 KB Output is correct
26 Correct 14 ms 23996 KB Output is correct
27 Correct 14 ms 24020 KB Output is correct
28 Correct 14 ms 24116 KB Output is correct
29 Correct 14 ms 24100 KB Output is correct
30 Correct 14 ms 24064 KB Output is correct
31 Correct 13 ms 23764 KB Output is correct
32 Correct 14 ms 24148 KB Output is correct
33 Correct 14 ms 23784 KB Output is correct
34 Correct 14 ms 24020 KB Output is correct
35 Correct 14 ms 24020 KB Output is correct
36 Correct 15 ms 24020 KB Output is correct
37 Correct 15 ms 24112 KB Output is correct
38 Correct 14 ms 23828 KB Output is correct
39 Correct 14 ms 24076 KB Output is correct
40 Correct 13 ms 23956 KB Output is correct
41 Correct 13 ms 24060 KB Output is correct
42 Correct 14 ms 24044 KB Output is correct
43 Correct 14 ms 24148 KB Output is correct
44 Correct 13 ms 23816 KB Output is correct
45 Correct 14 ms 24076 KB Output is correct
46 Correct 15 ms 24020 KB Output is correct
47 Correct 14 ms 23820 KB Output is correct
48 Correct 14 ms 24148 KB Output is correct
49 Correct 14 ms 24088 KB Output is correct
50 Correct 14 ms 24080 KB Output is correct
51 Correct 14 ms 23960 KB Output is correct
52 Correct 13 ms 24020 KB Output is correct
53 Correct 14 ms 24024 KB Output is correct
54 Correct 14 ms 24052 KB Output is correct
55 Correct 12 ms 23764 KB Output is correct
56 Correct 53 ms 31276 KB Output is correct
57 Correct 58 ms 31052 KB Output is correct
58 Correct 14 ms 24020 KB Output is correct
59 Correct 13 ms 23764 KB Output is correct
60 Correct 13 ms 23792 KB Output is correct
61 Correct 61 ms 31068 KB Output is correct
62 Correct 14 ms 23996 KB Output is correct
63 Correct 66 ms 36684 KB Output is correct
64 Correct 61 ms 31052 KB Output is correct
65 Correct 15 ms 23952 KB Output is correct
66 Correct 71 ms 31744 KB Output is correct
67 Correct 14 ms 23956 KB Output is correct
68 Correct 15 ms 23972 KB Output is correct
69 Correct 53 ms 31172 KB Output is correct
70 Correct 14 ms 24188 KB Output is correct
71 Correct 61 ms 30956 KB Output is correct
72 Correct 63 ms 32784 KB Output is correct
73 Correct 13 ms 23764 KB Output is correct
74 Correct 75 ms 37004 KB Output is correct
75 Correct 67 ms 33908 KB Output is correct
76 Correct 15 ms 24020 KB Output is correct
77 Correct 16 ms 24012 KB Output is correct
78 Correct 49 ms 29768 KB Output is correct
79 Correct 69 ms 32772 KB Output is correct
80 Correct 14 ms 24020 KB Output is correct
81 Correct 15 ms 24060 KB Output is correct
82 Correct 13 ms 23816 KB Output is correct
83 Correct 13 ms 23812 KB Output is correct
84 Correct 15 ms 23960 KB Output is correct
85 Correct 80 ms 32656 KB Output is correct
86 Correct 14 ms 24020 KB Output is correct
87 Correct 72 ms 31440 KB Output is correct
88 Correct 13 ms 23764 KB Output is correct
89 Correct 64 ms 31412 KB Output is correct
90 Correct 92 ms 32568 KB Output is correct
91 Correct 78 ms 34256 KB Output is correct
92 Correct 51 ms 31216 KB Output is correct
93 Correct 14 ms 24104 KB Output is correct
94 Correct 13 ms 23764 KB Output is correct
95 Correct 68 ms 34208 KB Output is correct
96 Correct 91 ms 37300 KB Output is correct
97 Correct 15 ms 24060 KB Output is correct
98 Correct 14 ms 23764 KB Output is correct
99 Correct 58 ms 32816 KB Output is correct
100 Correct 13 ms 24020 KB Output is correct
101 Correct 79 ms 31852 KB Output is correct
102 Correct 110 ms 36268 KB Output is correct
103 Correct 15 ms 24084 KB Output is correct
104 Correct 15 ms 24064 KB Output is correct
105 Correct 14 ms 24020 KB Output is correct
106 Correct 15 ms 24020 KB Output is correct
107 Correct 15 ms 24052 KB Output is correct
108 Correct 353 ms 69492 KB Output is correct
109 Correct 496 ms 73752 KB Output is correct
110 Correct 475 ms 82748 KB Output is correct
111 Correct 562 ms 95588 KB Output is correct
112 Correct 545 ms 87756 KB Output is correct
113 Correct 395 ms 77308 KB Output is correct
114 Correct 414 ms 59568 KB Output is correct
115 Correct 415 ms 59580 KB Output is correct
116 Correct 477 ms 65868 KB Output is correct
117 Correct 507 ms 77336 KB Output is correct
118 Correct 417 ms 62284 KB Output is correct
119 Correct 503 ms 77328 KB Output is correct
120 Correct 541 ms 88396 KB Output is correct
121 Correct 494 ms 77260 KB Output is correct
122 Correct 529 ms 71100 KB Output is correct
123 Correct 353 ms 78780 KB Output is correct
124 Correct 552 ms 75976 KB Output is correct