답안 #786703

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
786703	2023-07-18T11:29:35 Z	winter0101	Mergers (JOI19_mergers)	C++14	100 / 100	849 ms	114084 KB

mergers

#include<bits/stdc++.h>
using namespace std;
#define all(fl) fl.begin(),fl.end()
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define lb lower_bound
#define ub upper_bound
#define sz(a) (int)a.size()
#define pii pair<int,int>
#define pli pair<long long,int>
#define gcd __gcd
#define lcm(x,y) x*y/__gcd(x,y)
#define pil pair<int,long long>
const int maxn=5e5+9;
int st[maxn][20];
int dep[maxn];
vector<int>a[maxn];
int s[maxn];
int last[maxn];
int anc[maxn];
int in[maxn];
int ans=0,tme=0;
void dfs(int u,int par){
in[u]=++tme;
for (auto v:a[u]){
    if (v==par)continue;
    dep[v]=dep[u]+1;
    st[v][0]=u;
    for1(i,1,19)st[v][i]=st[st[v][i-1]][i-1];
    dfs(v,u);
}
}
int lca(int u,int v){
if (u==0)return v;
if (v==0)return u;
if (dep[u]<dep[v])swap(u,v);
int k=dep[u]-dep[v];
for1(i,0,19){
if (k>>i&1)u=st[u][i];
}
if(u==v)return u;
for2(i,19,0){
if (!st[u][i]||!st[v][i])continue;
if (st[u][i]!=st[v][i]){
    u=st[u][i];
    v=st[v][i];
}
}
return st[u][0];
}
int f[maxn];
int findset(int u){
if (f[u]<0)return u;
return f[u]=findset(f[u]);
}
void unite(int u,int v){
u=findset(u),v=findset(v);
if (u==v)return ;
if (f[u]>f[v])swap(u,v);
f[u]+=f[v];
f[v]=u;
}
void redfs(int u,int par){
anc[u]=last[s[u]];
for (auto v:a[u]){
    if (v==par)continue;
    redfs(v,u);
    anc[u]=lca(anc[u],anc[v]);
}
if (anc[u]==u&&u!=1){
    return;
}
else {
    //cerr<<u<<" "<<par<<'\n';
    if (par!=0)unite(u,par);
}
}
int deg[maxn];
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("temp.INP","r",stdin);
    //freopen("temp.OUT","w",stdout);
    int n,k;
    cin>>n>>k;
    for1(i,1,n)f[i]=-1;
    for1(i,1,n-1){
    int u,v;
    cin>>u>>v;
    a[u].pb(v);
    a[v].pb(u);
    }
    dfs(1,0);
    for1(i,1,n){
    cin>>s[i];
    last[s[i]]=lca(last[s[i]],i);
    }
    redfs(1,0);
    for1(i,2,n){
    if (anc[i]==i){
        deg[findset(i)]++;
        deg[findset(st[i][0])]++;
    }
    }
    for1(i,1,n){
    if (f[i]<0&&deg[i]==1)ans++;
    }
    cout<<(ans+1)/2;
}

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	12116 KB	Output is correct
2	Correct	6 ms	12264 KB	Output is correct
3	Correct	5 ms	12116 KB	Output is correct
4	Correct	5 ms	12116 KB	Output is correct
5	Correct	5 ms	12116 KB	Output is correct
6	Correct	5 ms	12116 KB	Output is correct
7	Correct	5 ms	12116 KB	Output is correct
8	Correct	6 ms	12116 KB	Output is correct
9	Correct	5 ms	12116 KB	Output is correct
10	Correct	6 ms	12116 KB	Output is correct
11	Correct	5 ms	12116 KB	Output is correct
12	Correct	5 ms	12116 KB	Output is correct
13	Correct	5 ms	12116 KB	Output is correct
14	Correct	5 ms	12116 KB	Output is correct
15	Correct	5 ms	12116 KB	Output is correct
16	Correct	5 ms	12116 KB	Output is correct
17	Correct	5 ms	12116 KB	Output is correct
18	Correct	5 ms	12116 KB	Output is correct
19	Correct	5 ms	12116 KB	Output is correct
20	Correct	5 ms	12116 KB	Output is correct
21	Correct	5 ms	12116 KB	Output is correct
22	Correct	5 ms	12116 KB	Output is correct
23	Correct	5 ms	12116 KB	Output is correct
24	Correct	6 ms	12116 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	12116 KB	Output is correct
2	Correct	6 ms	12264 KB	Output is correct
3	Correct	5 ms	12116 KB	Output is correct
4	Correct	5 ms	12116 KB	Output is correct
5	Correct	5 ms	12116 KB	Output is correct
6	Correct	5 ms	12116 KB	Output is correct
7	Correct	5 ms	12116 KB	Output is correct
8	Correct	6 ms	12116 KB	Output is correct
9	Correct	5 ms	12116 KB	Output is correct
10	Correct	6 ms	12116 KB	Output is correct
11	Correct	5 ms	12116 KB	Output is correct
12	Correct	5 ms	12116 KB	Output is correct
13	Correct	5 ms	12116 KB	Output is correct
14	Correct	5 ms	12116 KB	Output is correct
15	Correct	5 ms	12116 KB	Output is correct
16	Correct	5 ms	12116 KB	Output is correct
17	Correct	5 ms	12116 KB	Output is correct
18	Correct	5 ms	12116 KB	Output is correct
19	Correct	5 ms	12116 KB	Output is correct
20	Correct	5 ms	12116 KB	Output is correct
21	Correct	5 ms	12116 KB	Output is correct
22	Correct	5 ms	12116 KB	Output is correct
23	Correct	5 ms	12116 KB	Output is correct
24	Correct	6 ms	12116 KB	Output is correct
25	Correct	5 ms	12116 KB	Output is correct
26	Correct	7 ms	12424 KB	Output is correct
27	Correct	7 ms	12500 KB	Output is correct
28	Correct	7 ms	12628 KB	Output is correct
29	Correct	6 ms	12500 KB	Output is correct
30	Correct	7 ms	12444 KB	Output is correct
31	Correct	5 ms	12116 KB	Output is correct
32	Correct	7 ms	12628 KB	Output is correct
33	Correct	6 ms	12116 KB	Output is correct
34	Correct	6 ms	12500 KB	Output is correct
35	Correct	7 ms	12500 KB	Output is correct
36	Correct	7 ms	12440 KB	Output is correct
37	Correct	7 ms	12476 KB	Output is correct
38	Correct	6 ms	12076 KB	Output is correct
39	Correct	7 ms	12564 KB	Output is correct
40	Correct	7 ms	12472 KB	Output is correct
41	Correct	7 ms	12472 KB	Output is correct
42	Correct	7 ms	12500 KB	Output is correct
43	Correct	7 ms	12748 KB	Output is correct
44	Correct	5 ms	12116 KB	Output is correct
45	Correct	7 ms	12500 KB	Output is correct
46	Correct	7 ms	12480 KB	Output is correct
47	Correct	6 ms	12040 KB	Output is correct
48	Correct	8 ms	12476 KB	Output is correct
49	Correct	7 ms	12500 KB	Output is correct
50	Correct	7 ms	12608 KB	Output is correct
51	Correct	9 ms	12500 KB	Output is correct
52	Correct	7 ms	12500 KB	Output is correct
53	Correct	6 ms	12500 KB	Output is correct
54	Correct	7 ms	12480 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	12116 KB	Output is correct
2	Correct	6 ms	12264 KB	Output is correct
3	Correct	5 ms	12116 KB	Output is correct
4	Correct	5 ms	12116 KB	Output is correct
5	Correct	5 ms	12116 KB	Output is correct
6	Correct	5 ms	12116 KB	Output is correct
7	Correct	5 ms	12116 KB	Output is correct
8	Correct	6 ms	12116 KB	Output is correct
9	Correct	5 ms	12116 KB	Output is correct
10	Correct	6 ms	12116 KB	Output is correct
11	Correct	5 ms	12116 KB	Output is correct
12	Correct	5 ms	12116 KB	Output is correct
13	Correct	5 ms	12116 KB	Output is correct
14	Correct	5 ms	12116 KB	Output is correct
15	Correct	5 ms	12116 KB	Output is correct
16	Correct	5 ms	12116 KB	Output is correct
17	Correct	5 ms	12116 KB	Output is correct
18	Correct	5 ms	12116 KB	Output is correct
19	Correct	5 ms	12116 KB	Output is correct
20	Correct	5 ms	12116 KB	Output is correct
21	Correct	5 ms	12116 KB	Output is correct
22	Correct	5 ms	12116 KB	Output is correct
23	Correct	5 ms	12116 KB	Output is correct
24	Correct	6 ms	12116 KB	Output is correct
25	Correct	6 ms	12128 KB	Output is correct
26	Correct	50 ms	25356 KB	Output is correct
27	Correct	76 ms	25100 KB	Output is correct
28	Correct	8 ms	12544 KB	Output is correct
29	Correct	5 ms	12116 KB	Output is correct
30	Correct	6 ms	12116 KB	Output is correct
31	Correct	68 ms	25240 KB	Output is correct
32	Correct	7 ms	12500 KB	Output is correct
33	Correct	93 ms	32204 KB	Output is correct
34	Correct	67 ms	25036 KB	Output is correct
35	Correct	7 ms	12500 KB	Output is correct
36	Correct	77 ms	27340 KB	Output is correct
37	Correct	7 ms	12472 KB	Output is correct
38	Correct	7 ms	12472 KB	Output is correct
39	Correct	51 ms	26708 KB	Output is correct
40	Correct	7 ms	12756 KB	Output is correct
41	Correct	68 ms	26444 KB	Output is correct
42	Correct	90 ms	28860 KB	Output is correct
43	Correct	6 ms	12016 KB	Output is correct
44	Correct	91 ms	33892 KB	Output is correct
45	Correct	87 ms	30156 KB	Output is correct
46	Correct	7 ms	12556 KB	Output is correct
47	Correct	7 ms	12500 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	49 ms	25412 KB	Output is correct
2	Correct	54 ms	26136 KB	Output is correct
3	Correct	7 ms	12500 KB	Output is correct
4	Correct	7 ms	12500 KB	Output is correct
5	Correct	5 ms	12016 KB	Output is correct
6	Correct	5 ms	12116 KB	Output is correct
7	Correct	7 ms	12456 KB	Output is correct
8	Correct	82 ms	25616 KB	Output is correct
9	Correct	7 ms	12520 KB	Output is correct
10	Correct	75 ms	27004 KB	Output is correct
11	Correct	6 ms	12116 KB	Output is correct
12	Correct	76 ms	26952 KB	Output is correct
13	Correct	73 ms	27312 KB	Output is correct
14	Correct	68 ms	27640 KB	Output is correct
15	Correct	51 ms	26692 KB	Output is correct
16	Correct	7 ms	12500 KB	Output is correct
17	Correct	6 ms	12116 KB	Output is correct
18	Correct	59 ms	27820 KB	Output is correct
19	Correct	93 ms	31436 KB	Output is correct
20	Correct	7 ms	12472 KB	Output is correct
21	Correct	5 ms	12076 KB	Output is correct
22	Correct	56 ms	27644 KB	Output is correct
23	Correct	6 ms	12500 KB	Output is correct
24	Correct	78 ms	27032 KB	Output is correct
25	Correct	101 ms	30128 KB	Output is correct
26	Correct	7 ms	12500 KB	Output is correct
27	Correct	7 ms	12628 KB	Output is correct
28	Correct	6 ms	12556 KB	Output is correct
29	Correct	7 ms	12500 KB	Output is correct
30	Correct	6 ms	12500 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	12116 KB	Output is correct
2	Correct	6 ms	12264 KB	Output is correct
3	Correct	5 ms	12116 KB	Output is correct
4	Correct	5 ms	12116 KB	Output is correct
5	Correct	5 ms	12116 KB	Output is correct
6	Correct	5 ms	12116 KB	Output is correct
7	Correct	5 ms	12116 KB	Output is correct
8	Correct	6 ms	12116 KB	Output is correct
9	Correct	5 ms	12116 KB	Output is correct
10	Correct	6 ms	12116 KB	Output is correct
11	Correct	5 ms	12116 KB	Output is correct
12	Correct	5 ms	12116 KB	Output is correct
13	Correct	5 ms	12116 KB	Output is correct
14	Correct	5 ms	12116 KB	Output is correct
15	Correct	5 ms	12116 KB	Output is correct
16	Correct	5 ms	12116 KB	Output is correct
17	Correct	5 ms	12116 KB	Output is correct
18	Correct	5 ms	12116 KB	Output is correct
19	Correct	5 ms	12116 KB	Output is correct
20	Correct	5 ms	12116 KB	Output is correct
21	Correct	5 ms	12116 KB	Output is correct
22	Correct	5 ms	12116 KB	Output is correct
23	Correct	5 ms	12116 KB	Output is correct
24	Correct	6 ms	12116 KB	Output is correct
25	Correct	5 ms	12116 KB	Output is correct
26	Correct	7 ms	12424 KB	Output is correct
27	Correct	7 ms	12500 KB	Output is correct
28	Correct	7 ms	12628 KB	Output is correct
29	Correct	6 ms	12500 KB	Output is correct
30	Correct	7 ms	12444 KB	Output is correct
31	Correct	5 ms	12116 KB	Output is correct
32	Correct	7 ms	12628 KB	Output is correct
33	Correct	6 ms	12116 KB	Output is correct
34	Correct	6 ms	12500 KB	Output is correct
35	Correct	7 ms	12500 KB	Output is correct
36	Correct	7 ms	12440 KB	Output is correct
37	Correct	7 ms	12476 KB	Output is correct
38	Correct	6 ms	12076 KB	Output is correct
39	Correct	7 ms	12564 KB	Output is correct
40	Correct	7 ms	12472 KB	Output is correct
41	Correct	7 ms	12472 KB	Output is correct
42	Correct	7 ms	12500 KB	Output is correct
43	Correct	7 ms	12748 KB	Output is correct
44	Correct	5 ms	12116 KB	Output is correct
45	Correct	7 ms	12500 KB	Output is correct
46	Correct	7 ms	12480 KB	Output is correct
47	Correct	6 ms	12040 KB	Output is correct
48	Correct	8 ms	12476 KB	Output is correct
49	Correct	7 ms	12500 KB	Output is correct
50	Correct	7 ms	12608 KB	Output is correct
51	Correct	9 ms	12500 KB	Output is correct
52	Correct	7 ms	12500 KB	Output is correct
53	Correct	6 ms	12500 KB	Output is correct
54	Correct	7 ms	12480 KB	Output is correct
55	Correct	6 ms	12128 KB	Output is correct
56	Correct	50 ms	25356 KB	Output is correct
57	Correct	76 ms	25100 KB	Output is correct
58	Correct	8 ms	12544 KB	Output is correct
59	Correct	5 ms	12116 KB	Output is correct
60	Correct	6 ms	12116 KB	Output is correct
61	Correct	68 ms	25240 KB	Output is correct
62	Correct	7 ms	12500 KB	Output is correct
63	Correct	93 ms	32204 KB	Output is correct
64	Correct	67 ms	25036 KB	Output is correct
65	Correct	7 ms	12500 KB	Output is correct
66	Correct	77 ms	27340 KB	Output is correct
67	Correct	7 ms	12472 KB	Output is correct
68	Correct	7 ms	12472 KB	Output is correct
69	Correct	51 ms	26708 KB	Output is correct
70	Correct	7 ms	12756 KB	Output is correct
71	Correct	68 ms	26444 KB	Output is correct
72	Correct	90 ms	28860 KB	Output is correct
73	Correct	6 ms	12016 KB	Output is correct
74	Correct	91 ms	33892 KB	Output is correct
75	Correct	87 ms	30156 KB	Output is correct
76	Correct	7 ms	12556 KB	Output is correct
77	Correct	7 ms	12500 KB	Output is correct
78	Correct	49 ms	25412 KB	Output is correct
79	Correct	54 ms	26136 KB	Output is correct
80	Correct	7 ms	12500 KB	Output is correct
81	Correct	7 ms	12500 KB	Output is correct
82	Correct	5 ms	12016 KB	Output is correct
83	Correct	5 ms	12116 KB	Output is correct
84	Correct	7 ms	12456 KB	Output is correct
85	Correct	82 ms	25616 KB	Output is correct
86	Correct	7 ms	12520 KB	Output is correct
87	Correct	75 ms	27004 KB	Output is correct
88	Correct	6 ms	12116 KB	Output is correct
89	Correct	76 ms	26952 KB	Output is correct
90	Correct	73 ms	27312 KB	Output is correct
91	Correct	68 ms	27640 KB	Output is correct
92	Correct	51 ms	26692 KB	Output is correct
93	Correct	7 ms	12500 KB	Output is correct
94	Correct	6 ms	12116 KB	Output is correct
95	Correct	59 ms	27820 KB	Output is correct
96	Correct	93 ms	31436 KB	Output is correct
97	Correct	7 ms	12472 KB	Output is correct
98	Correct	5 ms	12076 KB	Output is correct
99	Correct	56 ms	27644 KB	Output is correct
100	Correct	6 ms	12500 KB	Output is correct
101	Correct	78 ms	27032 KB	Output is correct
102	Correct	101 ms	30128 KB	Output is correct
103	Correct	7 ms	12500 KB	Output is correct
104	Correct	7 ms	12628 KB	Output is correct
105	Correct	6 ms	12556 KB	Output is correct
106	Correct	7 ms	12500 KB	Output is correct
107	Correct	6 ms	12500 KB	Output is correct
108	Correct	397 ms	91220 KB	Output is correct
109	Correct	845 ms	102796 KB	Output is correct
110	Correct	849 ms	113920 KB	Output is correct
111	Correct	797 ms	114084 KB	Output is correct
112	Correct	806 ms	104284 KB	Output is correct
113	Correct	445 ms	92352 KB	Output is correct
114	Correct	587 ms	84776 KB	Output is correct
115	Correct	614 ms	84872 KB	Output is correct
116	Correct	674 ms	88824 KB	Output is correct
117	Correct	632 ms	91148 KB	Output is correct
118	Correct	595 ms	85684 KB	Output is correct
119	Correct	664 ms	90964 KB	Output is correct
120	Correct	778 ms	105132 KB	Output is correct
121	Correct	632 ms	91040 KB	Output is correct
122	Correct	680 ms	90196 KB	Output is correct
123	Correct	410 ms	92556 KB	Output is correct
124	Correct	765 ms	89256 KB	Output is correct

답안 #786703

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 24.0 / 24.0

Subtask #3 14.0 / 14.0

Subtask #4 22.0 / 22.0

Subtask #5 30.0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
24.0 / 24.0

Subtask #3
14.0 / 14.0

Subtask #4
22.0 / 22.0

Subtask #5
30.0 / 30.0