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답안 #949217

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
949217 2024-03-19T03:52:05 Z Tuanlinh123 Mergers (JOI19_mergers) C++17
70 / 100
 627 ms 242336 KB 
#include<bits/stdc++.h>
#define ll long long
#define pll pair<ll, ll>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define ld long double
#define sz(a) ((ll)(a).size())
using namespace std;
 
const ll maxn=500005;
pll sp[20][maxn];
vector <pll> euler;
vector <ll> leaf, A[maxn];
ll P[maxn], col[maxn], lca[maxn], pa[maxn], dsu[maxn], cnt[maxn];
 
void dfs(ll u)
{
    lca[u]=sz(euler)+1, euler.pb({lca[u], u});
    for (ll v:A[u])
        if (v!=pa[u])
            pa[v]=u, dfs(v), euler.pb({lca[u], u});
    if (sz(A[u])==1) leaf.pb(u);
}
 
void initlca()
{
    ll n=sz(euler);
    for (ll i=0; i<n; i++)
        sp[0][i+1]=euler[i];
    for (ll i=1; i<20; i++)
        for (ll j=1; j+(1<<i)<=n+1; j++)
            sp[i][j]=min(sp[i-1][j], sp[i-1][j+(1<<i-1)]);
}
 
ll LCA(ll u, ll v)
{
    if (!u || !v) return u+v;
    ll l=lca[u], r=lca[v];
    if (l>r) swap(l, r);
    ll j=__lg(r-l+1);
    return min(sp[j][l], sp[j][r-(1<<j)+1]).se;
}
 
ll Find(ll i)
{
    if (dsu[i]<0) return i;
    return dsu[i]=Find(dsu[i]);
}
 
void Union(ll a, ll b)
{
    a=Find(a), b=Find(b);
    if (a==b) return;
    if (dsu[a]>dsu[b]) swap(a, b);
    P[a]=LCA(P[a], P[b]), dsu[a]+=dsu[b], dsu[b]=a;
}

void dfs1(ll u)
{
    for (ll v:A[u])
        if (v!=pa[u])
            dfs1(v), cnt[u]+=cnt[v];
}
 
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    ll n, k; cin >> n >> k;
    for (ll i=1; i<n; i++)
    {
        ll u, v; cin >> u >> v;
        A[u].pb(v), A[v].pb(u);
    }
    dfs(1), initlca();
    for (ll i=1; i<=n; i++)
        cin >> col[i], P[col[i]]=LCA(P[col[i]], i), dsu[col[i]]=-1;
    for (ll i=1; i<=n; i++)
        cnt[i]++, cnt[P[col[i]]]--;
    dfs1(1);
    for (ll i=1; i<=n; i++)
        if (pa[i] && cnt[i])
            Union(col[i], col[pa[i]]);
    for (ll i=1; i<=n; i++) col[i]=Find(col[i]);
    for (ll i=1; i<=k; i++) P[i]=0;
    for (ll i=1; i<=n; i++)
        for (ll j:A[i])
            if (col[i]!=col[j])
            {
                if (P[col[i]]==0) P[col[i]]=col[j];
                else if (P[col[i]]!=col[j]) P[col[i]]=-1;
            }
    ll cnt=0;
    for (ll i=1; i<=k; i++)
        cnt+=P[i]>0;
    cout << (cnt+1)/2;
 
}

Compilation message

mergers.cpp: In function 'void initlca()':
mergers.cpp:34:53: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   34 |             sp[i][j]=min(sp[i-1][j], sp[i-1][j+(1<<i-1)]);
      |                                                    ~^~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 26968 KB Output is correct
2 Correct 9 ms 35164 KB Output is correct
3 Correct 5 ms 35160 KB Output is correct
4 Correct 6 ms 29020 KB Output is correct
5 Correct 5 ms 26972 KB Output is correct
6 Correct 6 ms 35160 KB Output is correct
7 Correct 4 ms 20828 KB Output is correct
8 Correct 6 ms 35160 KB Output is correct
9 Correct 5 ms 29020 KB Output is correct
10 Correct 4 ms 24924 KB Output is correct
11 Correct 6 ms 35164 KB Output is correct
12 Correct 6 ms 35164 KB Output is correct
13 Correct 6 ms 29020 KB Output is correct
14 Correct 6 ms 35164 KB Output is correct
15 Correct 5 ms 35164 KB Output is correct
16 Correct 5 ms 26972 KB Output is correct
17 Correct 5 ms 27056 KB Output is correct
18 Correct 6 ms 35160 KB Output is correct
19 Correct 5 ms 26968 KB Output is correct
20 Correct 5 ms 26972 KB Output is correct
21 Correct 7 ms 35164 KB Output is correct
22 Correct 5 ms 35164 KB Output is correct
23 Correct 5 ms 29020 KB Output is correct
24 Correct 5 ms 29020 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 26968 KB Output is correct
2 Correct 9 ms 35164 KB Output is correct
3 Correct 5 ms 35160 KB Output is correct
4 Correct 6 ms 29020 KB Output is correct
5 Correct 5 ms 26972 KB Output is correct
6 Correct 6 ms 35160 KB Output is correct
7 Correct 4 ms 20828 KB Output is correct
8 Correct 6 ms 35160 KB Output is correct
9 Correct 5 ms 29020 KB Output is correct
10 Correct 4 ms 24924 KB Output is correct
11 Correct 6 ms 35164 KB Output is correct
12 Correct 6 ms 35164 KB Output is correct
13 Correct 6 ms 29020 KB Output is correct
14 Correct 6 ms 35164 KB Output is correct
15 Correct 5 ms 35164 KB Output is correct
16 Correct 5 ms 26972 KB Output is correct
17 Correct 5 ms 27056 KB Output is correct
18 Correct 6 ms 35160 KB Output is correct
19 Correct 5 ms 26968 KB Output is correct
20 Correct 5 ms 26972 KB Output is correct
21 Correct 7 ms 35164 KB Output is correct
22 Correct 5 ms 35164 KB Output is correct
23 Correct 5 ms 29020 KB Output is correct
24 Correct 5 ms 29020 KB Output is correct
25 Correct 5 ms 33116 KB Output is correct
26 Correct 10 ms 47960 KB Output is correct
27 Correct 9 ms 47964 KB Output is correct
28 Correct 9 ms 48216 KB Output is correct
29 Correct 9 ms 47960 KB Output is correct
30 Correct 8 ms 47964 KB Output is correct
31 Correct 5 ms 33292 KB Output is correct
32 Correct 9 ms 48200 KB Output is correct
33 Correct 6 ms 33116 KB Output is correct
34 Correct 8 ms 47984 KB Output is correct
35 Correct 9 ms 47964 KB Output is correct
36 Correct 8 ms 47872 KB Output is correct
37 Correct 9 ms 47964 KB Output is correct
38 Correct 6 ms 35336 KB Output is correct
39 Correct 9 ms 47996 KB Output is correct
40 Correct 8 ms 47960 KB Output is correct
41 Correct 8 ms 47964 KB Output is correct
42 Correct 8 ms 47964 KB Output is correct
43 Correct 9 ms 48284 KB Output is correct
44 Correct 6 ms 35164 KB Output is correct
45 Correct 9 ms 48064 KB Output is correct
46 Correct 9 ms 47964 KB Output is correct
47 Correct 6 ms 35164 KB Output is correct
48 Correct 9 ms 47820 KB Output is correct
49 Correct 8 ms 47964 KB Output is correct
50 Correct 9 ms 47964 KB Output is correct
51 Correct 9 ms 48056 KB Output is correct
52 Correct 8 ms 47964 KB Output is correct
53 Correct 8 ms 47960 KB Output is correct
54 Correct 8 ms 47960 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 26968 KB Output is correct
2 Correct 9 ms 35164 KB Output is correct
3 Correct 5 ms 35160 KB Output is correct
4 Correct 6 ms 29020 KB Output is correct
5 Correct 5 ms 26972 KB Output is correct
6 Correct 6 ms 35160 KB Output is correct
7 Correct 4 ms 20828 KB Output is correct
8 Correct 6 ms 35160 KB Output is correct
9 Correct 5 ms 29020 KB Output is correct
10 Correct 4 ms 24924 KB Output is correct
11 Correct 6 ms 35164 KB Output is correct
12 Correct 6 ms 35164 KB Output is correct
13 Correct 6 ms 29020 KB Output is correct
14 Correct 6 ms 35164 KB Output is correct
15 Correct 5 ms 35164 KB Output is correct
16 Correct 5 ms 26972 KB Output is correct
17 Correct 5 ms 27056 KB Output is correct
18 Correct 6 ms 35160 KB Output is correct
19 Correct 5 ms 26968 KB Output is correct
20 Correct 5 ms 26972 KB Output is correct
21 Correct 7 ms 35164 KB Output is correct
22 Correct 5 ms 35164 KB Output is correct
23 Correct 5 ms 29020 KB Output is correct
24 Correct 5 ms 29020 KB Output is correct
25 Correct 5 ms 33112 KB Output is correct
26 Correct 97 ms 124852 KB Output is correct
27 Correct 69 ms 123832 KB Output is correct
28 Correct 8 ms 47964 KB Output is correct
29 Correct 5 ms 33116 KB Output is correct
30 Correct 5 ms 33116 KB Output is correct
31 Correct 71 ms 124268 KB Output is correct
32 Correct 8 ms 47964 KB Output is correct
33 Correct 89 ms 133452 KB Output is correct
34 Correct 75 ms 124604 KB Output is correct
35 Correct 9 ms 47964 KB Output is correct
36 Correct 71 ms 123512 KB Output is correct
37 Correct 8 ms 47964 KB Output is correct
38 Correct 8 ms 47964 KB Output is correct
39 Correct 59 ms 124992 KB Output is correct
40 Correct 9 ms 48220 KB Output is correct
41 Correct 87 ms 123708 KB Output is correct
42 Correct 90 ms 125796 KB Output is correct
43 Correct 6 ms 35164 KB Output is correct
44 Correct 97 ms 133104 KB Output is correct
45 Correct 79 ms 129652 KB Output is correct
46 Correct 9 ms 47964 KB Output is correct
47 Correct 8 ms 47960 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 53 ms 124968 KB Output is correct
2 Correct 55 ms 127676 KB Output is correct
3 Correct 10 ms 47964 KB Output is correct
4 Correct 8 ms 48040 KB Output is correct
5 Correct 5 ms 33116 KB Output is correct
6 Correct 6 ms 33116 KB Output is correct
7 Correct 8 ms 47964 KB Output is correct
8 Correct 81 ms 126332 KB Output is correct
9 Correct 8 ms 47964 KB Output is correct
10 Correct 76 ms 123780 KB Output is correct
11 Correct 6 ms 35160 KB Output is correct
12 Correct 75 ms 123332 KB Output is correct
13 Correct 81 ms 126004 KB Output is correct
14 Correct 73 ms 126908 KB Output is correct
15 Correct 62 ms 125580 KB Output is correct
16 Correct 8 ms 47964 KB Output is correct
17 Correct 6 ms 35164 KB Output is correct
18 Correct 58 ms 127540 KB Output is correct
19 Correct 85 ms 130936 KB Output is correct
20 Correct 8 ms 47960 KB Output is correct
21 Correct 6 ms 35160 KB Output is correct
22 Correct 61 ms 127416 KB Output is correct
23 Correct 8 ms 47964 KB Output is correct
24 Correct 86 ms 123860 KB Output is correct
25 Correct 75 ms 131652 KB Output is correct
26 Correct 8 ms 47964 KB Output is correct
27 Correct 9 ms 47964 KB Output is correct
28 Correct 9 ms 47964 KB Output is correct
29 Correct 8 ms 47964 KB Output is correct
30 Correct 8 ms 47964 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 26968 KB Output is correct
2 Correct 9 ms 35164 KB Output is correct
3 Correct 5 ms 35160 KB Output is correct
4 Correct 6 ms 29020 KB Output is correct
5 Correct 5 ms 26972 KB Output is correct
6 Correct 6 ms 35160 KB Output is correct
7 Correct 4 ms 20828 KB Output is correct
8 Correct 6 ms 35160 KB Output is correct
9 Correct 5 ms 29020 KB Output is correct
10 Correct 4 ms 24924 KB Output is correct
11 Correct 6 ms 35164 KB Output is correct
12 Correct 6 ms 35164 KB Output is correct
13 Correct 6 ms 29020 KB Output is correct
14 Correct 6 ms 35164 KB Output is correct
15 Correct 5 ms 35164 KB Output is correct
16 Correct 5 ms 26972 KB Output is correct
17 Correct 5 ms 27056 KB Output is correct
18 Correct 6 ms 35160 KB Output is correct
19 Correct 5 ms 26968 KB Output is correct
20 Correct 5 ms 26972 KB Output is correct
21 Correct 7 ms 35164 KB Output is correct
22 Correct 5 ms 35164 KB Output is correct
23 Correct 5 ms 29020 KB Output is correct
24 Correct 5 ms 29020 KB Output is correct
25 Correct 5 ms 33116 KB Output is correct
26 Correct 10 ms 47960 KB Output is correct
27 Correct 9 ms 47964 KB Output is correct
28 Correct 9 ms 48216 KB Output is correct
29 Correct 9 ms 47960 KB Output is correct
30 Correct 8 ms 47964 KB Output is correct
31 Correct 5 ms 33292 KB Output is correct
32 Correct 9 ms 48200 KB Output is correct
33 Correct 6 ms 33116 KB Output is correct
34 Correct 8 ms 47984 KB Output is correct
35 Correct 9 ms 47964 KB Output is correct
36 Correct 8 ms 47872 KB Output is correct
37 Correct 9 ms 47964 KB Output is correct
38 Correct 6 ms 35336 KB Output is correct
39 Correct 9 ms 47996 KB Output is correct
40 Correct 8 ms 47960 KB Output is correct
41 Correct 8 ms 47964 KB Output is correct
42 Correct 8 ms 47964 KB Output is correct
43 Correct 9 ms 48284 KB Output is correct
44 Correct 6 ms 35164 KB Output is correct
45 Correct 9 ms 48064 KB Output is correct
46 Correct 9 ms 47964 KB Output is correct
47 Correct 6 ms 35164 KB Output is correct
48 Correct 9 ms 47820 KB Output is correct
49 Correct 8 ms 47964 KB Output is correct
50 Correct 9 ms 47964 KB Output is correct
51 Correct 9 ms 48056 KB Output is correct
52 Correct 8 ms 47964 KB Output is correct
53 Correct 8 ms 47960 KB Output is correct
54 Correct 8 ms 47960 KB Output is correct
55 Correct 5 ms 33112 KB Output is correct
56 Correct 97 ms 124852 KB Output is correct
57 Correct 69 ms 123832 KB Output is correct
58 Correct 8 ms 47964 KB Output is correct
59 Correct 5 ms 33116 KB Output is correct
60 Correct 5 ms 33116 KB Output is correct
61 Correct 71 ms 124268 KB Output is correct
62 Correct 8 ms 47964 KB Output is correct
63 Correct 89 ms 133452 KB Output is correct
64 Correct 75 ms 124604 KB Output is correct
65 Correct 9 ms 47964 KB Output is correct
66 Correct 71 ms 123512 KB Output is correct
67 Correct 8 ms 47964 KB Output is correct
68 Correct 8 ms 47964 KB Output is correct
69 Correct 59 ms 124992 KB Output is correct
70 Correct 9 ms 48220 KB Output is correct
71 Correct 87 ms 123708 KB Output is correct
72 Correct 90 ms 125796 KB Output is correct
73 Correct 6 ms 35164 KB Output is correct
74 Correct 97 ms 133104 KB Output is correct
75 Correct 79 ms 129652 KB Output is correct
76 Correct 9 ms 47964 KB Output is correct
77 Correct 8 ms 47960 KB Output is correct
78 Correct 53 ms 124968 KB Output is correct
79 Correct 55 ms 127676 KB Output is correct
80 Correct 10 ms 47964 KB Output is correct
81 Correct 8 ms 48040 KB Output is correct
82 Correct 5 ms 33116 KB Output is correct
83 Correct 6 ms 33116 KB Output is correct
84 Correct 8 ms 47964 KB Output is correct
85 Correct 81 ms 126332 KB Output is correct
86 Correct 8 ms 47964 KB Output is correct
87 Correct 76 ms 123780 KB Output is correct
88 Correct 6 ms 35160 KB Output is correct
89 Correct 75 ms 123332 KB Output is correct
90 Correct 81 ms 126004 KB Output is correct
91 Correct 73 ms 126908 KB Output is correct
92 Correct 62 ms 125580 KB Output is correct
93 Correct 8 ms 47964 KB Output is correct
94 Correct 6 ms 35164 KB Output is correct
95 Correct 58 ms 127540 KB Output is correct
96 Correct 85 ms 130936 KB Output is correct
97 Correct 8 ms 47960 KB Output is correct
98 Correct 6 ms 35160 KB Output is correct
99 Correct 61 ms 127416 KB Output is correct
100 Correct 8 ms 47964 KB Output is correct
101 Correct 86 ms 123860 KB Output is correct
102 Correct 75 ms 131652 KB Output is correct
103 Correct 8 ms 47964 KB Output is correct
104 Correct 9 ms 47964 KB Output is correct
105 Correct 9 ms 47964 KB Output is correct
106 Correct 8 ms 47964 KB Output is correct
107 Correct 8 ms 47964 KB Output is correct
108 Correct 488 ms 232360 KB Output is correct
109 Incorrect 627 ms 242336 KB Output isn't correct
110 Halted 0 ms 0 KB -