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답안 #949246

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
949246 2024-03-19T04:08:13 Z Tuanlinh123 Mergers (JOI19_mergers) C++17
70 / 100
 219 ms 262144 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=1000005;
pll sp[20][maxn];
vector <pll> euler;
vector <ll> leaf, A[maxn], C[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], C[col[i]].pb(i), dsu[i]=-1;
    for (ll i=1; i<=n; i++)
        for (ll j=0; j+1<sz(C[i]); j++)
        {
            ll u=C[i][j], v=C[i][j+1];
            cnt[u]++, cnt[v]++, cnt[LCA(u, v)]-=2;
        }
    dfs1(1);
    for (ll i=1; i<=n; i++)
        if (pa[i] && cnt[i])
            Union(i, pa[i]);
    for (ll i=1; i<=n; i++) P[i]=0;
    for (ll i=1; i<=n; i++)
        if (!cnt[i] && pa[i])
            P[Find(i)]++, P[Find(pa[i])]++;
    ll cnt=0;
    for (ll i=1; i<=n; i++)
        cnt+=P[i]==1;
    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 14 ms 61788 KB Output is correct
2 Correct 19 ms 70236 KB Output is correct
3 Correct 15 ms 70236 KB Output is correct
4 Correct 14 ms 64004 KB Output is correct
5 Correct 13 ms 61788 KB Output is correct
6 Correct 13 ms 70236 KB Output is correct
7 Correct 12 ms 57692 KB Output is correct
8 Correct 13 ms 70236 KB Output is correct
9 Correct 13 ms 63836 KB Output is correct
10 Correct 13 ms 59740 KB Output is correct
11 Correct 13 ms 70236 KB Output is correct
12 Correct 13 ms 70236 KB Output is correct
13 Correct 12 ms 64092 KB Output is correct
14 Correct 13 ms 70256 KB Output is correct
15 Correct 13 ms 70236 KB Output is correct
16 Correct 12 ms 63836 KB Output is correct
17 Correct 13 ms 61788 KB Output is correct
18 Correct 14 ms 70236 KB Output is correct
19 Correct 14 ms 63836 KB Output is correct
20 Correct 15 ms 64080 KB Output is correct
21 Correct 13 ms 70236 KB Output is correct
22 Correct 13 ms 70236 KB Output is correct
23 Correct 14 ms 64088 KB Output is correct
24 Correct 12 ms 63836 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 61788 KB Output is correct
2 Correct 19 ms 70236 KB Output is correct
3 Correct 15 ms 70236 KB Output is correct
4 Correct 14 ms 64004 KB Output is correct
5 Correct 13 ms 61788 KB Output is correct
6 Correct 13 ms 70236 KB Output is correct
7 Correct 12 ms 57692 KB Output is correct
8 Correct 13 ms 70236 KB Output is correct
9 Correct 13 ms 63836 KB Output is correct
10 Correct 13 ms 59740 KB Output is correct
11 Correct 13 ms 70236 KB Output is correct
12 Correct 13 ms 70236 KB Output is correct
13 Correct 12 ms 64092 KB Output is correct
14 Correct 13 ms 70256 KB Output is correct
15 Correct 13 ms 70236 KB Output is correct
16 Correct 12 ms 63836 KB Output is correct
17 Correct 13 ms 61788 KB Output is correct
18 Correct 14 ms 70236 KB Output is correct
19 Correct 14 ms 63836 KB Output is correct
20 Correct 15 ms 64080 KB Output is correct
21 Correct 13 ms 70236 KB Output is correct
22 Correct 13 ms 70236 KB Output is correct
23 Correct 14 ms 64088 KB Output is correct
24 Correct 12 ms 63836 KB Output is correct
25 Correct 14 ms 68188 KB Output is correct
26 Correct 20 ms 82780 KB Output is correct
27 Correct 16 ms 82780 KB Output is correct
28 Correct 18 ms 83036 KB Output is correct
29 Correct 17 ms 82940 KB Output is correct
30 Correct 20 ms 82780 KB Output is correct
31 Correct 14 ms 68080 KB Output is correct
32 Correct 17 ms 83036 KB Output is correct
33 Correct 13 ms 68188 KB Output is correct
34 Correct 16 ms 82968 KB Output is correct
35 Correct 18 ms 84828 KB Output is correct
36 Correct 17 ms 82780 KB Output is correct
37 Correct 20 ms 82776 KB Output is correct
38 Correct 14 ms 70232 KB Output is correct
39 Correct 19 ms 82780 KB Output is correct
40 Correct 16 ms 82780 KB Output is correct
41 Correct 19 ms 82780 KB Output is correct
42 Correct 16 ms 82780 KB Output is correct
43 Correct 16 ms 83192 KB Output is correct
44 Correct 15 ms 70236 KB Output is correct
45 Correct 18 ms 82972 KB Output is correct
46 Correct 17 ms 82864 KB Output is correct
47 Correct 14 ms 70236 KB Output is correct
48 Correct 16 ms 82968 KB Output is correct
49 Correct 16 ms 84828 KB Output is correct
50 Correct 18 ms 85084 KB Output is correct
51 Correct 17 ms 82956 KB Output is correct
52 Correct 16 ms 82780 KB Output is correct
53 Correct 17 ms 82780 KB Output is correct
54 Correct 17 ms 82900 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 61788 KB Output is correct
2 Correct 19 ms 70236 KB Output is correct
3 Correct 15 ms 70236 KB Output is correct
4 Correct 14 ms 64004 KB Output is correct
5 Correct 13 ms 61788 KB Output is correct
6 Correct 13 ms 70236 KB Output is correct
7 Correct 12 ms 57692 KB Output is correct
8 Correct 13 ms 70236 KB Output is correct
9 Correct 13 ms 63836 KB Output is correct
10 Correct 13 ms 59740 KB Output is correct
11 Correct 13 ms 70236 KB Output is correct
12 Correct 13 ms 70236 KB Output is correct
13 Correct 12 ms 64092 KB Output is correct
14 Correct 13 ms 70256 KB Output is correct
15 Correct 13 ms 70236 KB Output is correct
16 Correct 12 ms 63836 KB Output is correct
17 Correct 13 ms 61788 KB Output is correct
18 Correct 14 ms 70236 KB Output is correct
19 Correct 14 ms 63836 KB Output is correct
20 Correct 15 ms 64080 KB Output is correct
21 Correct 13 ms 70236 KB Output is correct
22 Correct 13 ms 70236 KB Output is correct
23 Correct 14 ms 64088 KB Output is correct
24 Correct 12 ms 63836 KB Output is correct
25 Correct 14 ms 68188 KB Output is correct
26 Correct 86 ms 156708 KB Output is correct
27 Correct 100 ms 157036 KB Output is correct
28 Correct 16 ms 82900 KB Output is correct
29 Correct 13 ms 68200 KB Output is correct
30 Correct 14 ms 68196 KB Output is correct
31 Correct 92 ms 156156 KB Output is correct
32 Correct 17 ms 82940 KB Output is correct
33 Correct 111 ms 165308 KB Output is correct
34 Correct 84 ms 156092 KB Output is correct
35 Correct 16 ms 82780 KB Output is correct
36 Correct 112 ms 156120 KB Output is correct
37 Correct 16 ms 82780 KB Output is correct
38 Correct 16 ms 82924 KB Output is correct
39 Correct 70 ms 156724 KB Output is correct
40 Correct 17 ms 83192 KB Output is correct
41 Correct 94 ms 156764 KB Output is correct
42 Correct 88 ms 158600 KB Output is correct
43 Correct 15 ms 70236 KB Output is correct
44 Correct 102 ms 167184 KB Output is correct
45 Correct 92 ms 161972 KB Output is correct
46 Correct 16 ms 82892 KB Output is correct
47 Correct 17 ms 82780 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 70 ms 157752 KB Output is correct
2 Correct 84 ms 159760 KB Output is correct
3 Correct 17 ms 82960 KB Output is correct
4 Correct 19 ms 82780 KB Output is correct
5 Correct 14 ms 68184 KB Output is correct
6 Correct 14 ms 68188 KB Output is correct
7 Correct 18 ms 82780 KB Output is correct
8 Correct 97 ms 157420 KB Output is correct
9 Correct 17 ms 82780 KB Output is correct
10 Correct 85 ms 156088 KB Output is correct
11 Correct 14 ms 70236 KB Output is correct
12 Correct 89 ms 155408 KB Output is correct
13 Correct 112 ms 157484 KB Output is correct
14 Correct 101 ms 159928 KB Output is correct
15 Correct 71 ms 156980 KB Output is correct
16 Correct 17 ms 82780 KB Output is correct
17 Correct 15 ms 70144 KB Output is correct
18 Correct 78 ms 158776 KB Output is correct
19 Correct 105 ms 164704 KB Output is correct
20 Correct 16 ms 82780 KB Output is correct
21 Correct 13 ms 70128 KB Output is correct
22 Correct 76 ms 157480 KB Output is correct
23 Correct 16 ms 82776 KB Output is correct
24 Correct 115 ms 156896 KB Output is correct
25 Correct 96 ms 164020 KB Output is correct
26 Correct 16 ms 84824 KB Output is correct
27 Correct 17 ms 85080 KB Output is correct
28 Correct 20 ms 83068 KB Output is correct
29 Correct 16 ms 82780 KB Output is correct
30 Correct 16 ms 82780 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 61788 KB Output is correct
2 Correct 19 ms 70236 KB Output is correct
3 Correct 15 ms 70236 KB Output is correct
4 Correct 14 ms 64004 KB Output is correct
5 Correct 13 ms 61788 KB Output is correct
6 Correct 13 ms 70236 KB Output is correct
7 Correct 12 ms 57692 KB Output is correct
8 Correct 13 ms 70236 KB Output is correct
9 Correct 13 ms 63836 KB Output is correct
10 Correct 13 ms 59740 KB Output is correct
11 Correct 13 ms 70236 KB Output is correct
12 Correct 13 ms 70236 KB Output is correct
13 Correct 12 ms 64092 KB Output is correct
14 Correct 13 ms 70256 KB Output is correct
15 Correct 13 ms 70236 KB Output is correct
16 Correct 12 ms 63836 KB Output is correct
17 Correct 13 ms 61788 KB Output is correct
18 Correct 14 ms 70236 KB Output is correct
19 Correct 14 ms 63836 KB Output is correct
20 Correct 15 ms 64080 KB Output is correct
21 Correct 13 ms 70236 KB Output is correct
22 Correct 13 ms 70236 KB Output is correct
23 Correct 14 ms 64088 KB Output is correct
24 Correct 12 ms 63836 KB Output is correct
25 Correct 14 ms 68188 KB Output is correct
26 Correct 20 ms 82780 KB Output is correct
27 Correct 16 ms 82780 KB Output is correct
28 Correct 18 ms 83036 KB Output is correct
29 Correct 17 ms 82940 KB Output is correct
30 Correct 20 ms 82780 KB Output is correct
31 Correct 14 ms 68080 KB Output is correct
32 Correct 17 ms 83036 KB Output is correct
33 Correct 13 ms 68188 KB Output is correct
34 Correct 16 ms 82968 KB Output is correct
35 Correct 18 ms 84828 KB Output is correct
36 Correct 17 ms 82780 KB Output is correct
37 Correct 20 ms 82776 KB Output is correct
38 Correct 14 ms 70232 KB Output is correct
39 Correct 19 ms 82780 KB Output is correct
40 Correct 16 ms 82780 KB Output is correct
41 Correct 19 ms 82780 KB Output is correct
42 Correct 16 ms 82780 KB Output is correct
43 Correct 16 ms 83192 KB Output is correct
44 Correct 15 ms 70236 KB Output is correct
45 Correct 18 ms 82972 KB Output is correct
46 Correct 17 ms 82864 KB Output is correct
47 Correct 14 ms 70236 KB Output is correct
48 Correct 16 ms 82968 KB Output is correct
49 Correct 16 ms 84828 KB Output is correct
50 Correct 18 ms 85084 KB Output is correct
51 Correct 17 ms 82956 KB Output is correct
52 Correct 16 ms 82780 KB Output is correct
53 Correct 17 ms 82780 KB Output is correct
54 Correct 17 ms 82900 KB Output is correct
55 Correct 14 ms 68188 KB Output is correct
56 Correct 86 ms 156708 KB Output is correct
57 Correct 100 ms 157036 KB Output is correct
58 Correct 16 ms 82900 KB Output is correct
59 Correct 13 ms 68200 KB Output is correct
60 Correct 14 ms 68196 KB Output is correct
61 Correct 92 ms 156156 KB Output is correct
62 Correct 17 ms 82940 KB Output is correct
63 Correct 111 ms 165308 KB Output is correct
64 Correct 84 ms 156092 KB Output is correct
65 Correct 16 ms 82780 KB Output is correct
66 Correct 112 ms 156120 KB Output is correct
67 Correct 16 ms 82780 KB Output is correct
68 Correct 16 ms 82924 KB Output is correct
69 Correct 70 ms 156724 KB Output is correct
70 Correct 17 ms 83192 KB Output is correct
71 Correct 94 ms 156764 KB Output is correct
72 Correct 88 ms 158600 KB Output is correct
73 Correct 15 ms 70236 KB Output is correct
74 Correct 102 ms 167184 KB Output is correct
75 Correct 92 ms 161972 KB Output is correct
76 Correct 16 ms 82892 KB Output is correct
77 Correct 17 ms 82780 KB Output is correct
78 Correct 70 ms 157752 KB Output is correct
79 Correct 84 ms 159760 KB Output is correct
80 Correct 17 ms 82960 KB Output is correct
81 Correct 19 ms 82780 KB Output is correct
82 Correct 14 ms 68184 KB Output is correct
83 Correct 14 ms 68188 KB Output is correct
84 Correct 18 ms 82780 KB Output is correct
85 Correct 97 ms 157420 KB Output is correct
86 Correct 17 ms 82780 KB Output is correct
87 Correct 85 ms 156088 KB Output is correct
88 Correct 14 ms 70236 KB Output is correct
89 Correct 89 ms 155408 KB Output is correct
90 Correct 112 ms 157484 KB Output is correct
91 Correct 101 ms 159928 KB Output is correct
92 Correct 71 ms 156980 KB Output is correct
93 Correct 17 ms 82780 KB Output is correct
94 Correct 15 ms 70144 KB Output is correct
95 Correct 78 ms 158776 KB Output is correct
96 Correct 105 ms 164704 KB Output is correct
97 Correct 16 ms 82780 KB Output is correct
98 Correct 13 ms 70128 KB Output is correct
99 Correct 76 ms 157480 KB Output is correct
100 Correct 16 ms 82776 KB Output is correct
101 Correct 115 ms 156896 KB Output is correct
102 Correct 96 ms 164020 KB Output is correct
103 Correct 16 ms 84824 KB Output is correct
104 Correct 17 ms 85080 KB Output is correct
105 Correct 20 ms 83068 KB Output is correct
106 Correct 16 ms 82780 KB Output is correct
107 Correct 16 ms 82780 KB Output is correct
108 Runtime error 219 ms 262144 KB Execution killed with signal 9
109 Halted 0 ms 0 KB -