답안 #536694

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
536694	2022-03-13T22:16:50 Z	__Variatto	Railway (BOI17_railway)	C++17	100 / 100	126 ms	25604 KB

railway

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define ll long long
const int MAX=1e5+10, L=18;
int n, m, k, jump[MAX][L+2], gle[MAX], pre[MAX];
vector<pair<int,int>>g[MAX], akt;
int czas=1;
void dfs(int v, int oj){
    jump[v][0]=oj;
    pre[v]=czas++;
    for(int i=1; i<=L; i++)
        jump[v][i]=jump[jump[v][i-1]][i-1];
    for(auto s:g[v]){
        if(s.fi!=oj){
            gle[s.fi]=gle[v]+1;
            dfs(s.fi, v);
        }
    }
}
int LCA(int a, int b){
    if(gle[b]>gle[a]) swap(a, b);
    for(int i=L; i>=0; i--)
        if(gle[jump[a][i]]>=gle[b])
            a=jump[a][i];
    if(a==b) return a;
    int wyn=a;
    for(int i=L; i>=0; i--){
        if(jump[a][i]==jump[b][i])
            wyn=jump[a][i];
        else
            a=jump[a][i], b=jump[b][i];
    }
    return wyn;
}
int dod[MAX], usu[MAX], suma[MAX];
vector<int>wynik;

void dfs2(int v, int oj, int ind){
    for(auto s:g[v]){
        if(s.fi!=oj){
            dfs2(s.fi, v, s.se);
            suma[v]+=suma[s.fi];
        }
    }
    suma[v]+=dod[v]-usu[v];
    if(suma[v]>=k*2) wynik.pb(ind);
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin>>n>>m>>k;
    for(int i=1; i<=n-1; i++){
        int a, b;
        cin>>a>>b;
        g[a].pb({b, i}), g[b].pb({a, i});
    }
    dfs(1, 1);
    for(int i=1; i<=m; i++){
        int s, x;
        cin>>s;
        akt.clear();
        for(int j=1; j<=s; j++){
            cin>>x;
            akt.pb({pre[x], x});
        }
        sort(akt.begin(), akt.end());
        int last=0;
        for(auto a: akt){
            if(last){
                int lca=LCA(last, a.se);
                dod[last]++, dod[a.se]++, usu[lca]+=2;
            }
            last=a.se;
        }
        if(akt.size()>=2){
            int lca=LCA(akt[0].se, akt.back().se);
            dod[akt.back().se]++, dod[akt[0].se]++, usu[lca]+=2;
        }
    }
    dfs2(1, 1, 0);
    cout<<wynik.size()<<"\n";
    sort(wynik.begin(), wynik.end());
    for(auto a:wynik)
        cout<<a<<" ";
    cout<<"\n";
}

Subtask #1
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2644 KB	Output is correct
2	Correct	7 ms	4048 KB	Output is correct
3	Correct	6 ms	3924 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	2 ms	2644 KB	Output is correct
6	Correct	6 ms	4436 KB	Output is correct
7	Correct	6 ms	4100 KB	Output is correct
8	Correct	5 ms	4052 KB	Output is correct
9	Correct	5 ms	3932 KB	Output is correct
10	Correct	2 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct

Subtask #2
15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2644 KB	Output is correct
2	Correct	7 ms	4048 KB	Output is correct
3	Correct	6 ms	3924 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	2 ms	2644 KB	Output is correct
6	Correct	6 ms	4436 KB	Output is correct
7	Correct	6 ms	4100 KB	Output is correct
8	Correct	5 ms	4052 KB	Output is correct
9	Correct	5 ms	3932 KB	Output is correct
10	Correct	2 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct
15	Correct	30 ms	4024 KB	Output is correct
16	Correct	28 ms	4004 KB	Output is correct
17	Correct	30 ms	4136 KB	Output is correct
18	Correct	6 ms	4436 KB	Output is correct
19	Correct	9 ms	3976 KB	Output is correct
20	Correct	35 ms	4016 KB	Output is correct
21	Correct	34 ms	4000 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	6 ms	3996 KB	Output is correct
24	Correct	6 ms	3924 KB	Output is correct
25	Correct	1 ms	2644 KB	Output is correct
26	Correct	1 ms	2644 KB	Output is correct
27	Correct	7 ms	4436 KB	Output is correct
28	Correct	6 ms	4052 KB	Output is correct
29	Correct	6 ms	4052 KB	Output is correct
30	Correct	6 ms	4052 KB	Output is correct
31	Correct	1 ms	2644 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct
33	Correct	2 ms	2644 KB	Output is correct
34	Correct	2 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct

Subtask #3
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	112 ms	24216 KB	Output is correct
2	Correct	2 ms	2644 KB	Output is correct
3	Correct	109 ms	23920 KB	Output is correct
4	Correct	109 ms	23352 KB	Output is correct
5	Correct	116 ms	24248 KB	Output is correct
6	Correct	101 ms	24388 KB	Output is correct

Subtask #4
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	83 ms	19408 KB	Output is correct
2	Correct	94 ms	16148 KB	Output is correct
3	Correct	109 ms	15820 KB	Output is correct
4	Correct	100 ms	15796 KB	Output is correct
5	Correct	98 ms	15792 KB	Output is correct
6	Correct	78 ms	19520 KB	Output is correct
7	Correct	76 ms	19600 KB	Output is correct

Subtask #5
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	83 ms	19408 KB	Output is correct
2	Correct	94 ms	16148 KB	Output is correct
3	Correct	109 ms	15820 KB	Output is correct
4	Correct	100 ms	15796 KB	Output is correct
5	Correct	98 ms	15792 KB	Output is correct
6	Correct	78 ms	19520 KB	Output is correct
7	Correct	76 ms	19600 KB	Output is correct
8	Correct	89 ms	20056 KB	Output is correct
9	Correct	92 ms	21124 KB	Output is correct
10	Correct	109 ms	25512 KB	Output is correct
11	Correct	104 ms	25604 KB	Output is correct
12	Correct	77 ms	17228 KB	Output is correct
13	Correct	77 ms	17144 KB	Output is correct
14	Correct	95 ms	17212 KB	Output is correct
15	Correct	98 ms	17116 KB	Output is correct
16	Correct	103 ms	16912 KB	Output is correct
17	Correct	102 ms	16968 KB	Output is correct
18	Correct	126 ms	16916 KB	Output is correct
19	Correct	102 ms	17292 KB	Output is correct
20	Correct	81 ms	20928 KB	Output is correct
21	Correct	80 ms	20940 KB	Output is correct
22	Correct	88 ms	20896 KB	Output is correct

Subtask #6
25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2644 KB	Output is correct
2	Correct	7 ms	4048 KB	Output is correct
3	Correct	6 ms	3924 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	2 ms	2644 KB	Output is correct
6	Correct	6 ms	4436 KB	Output is correct
7	Correct	6 ms	4100 KB	Output is correct
8	Correct	5 ms	4052 KB	Output is correct
9	Correct	5 ms	3932 KB	Output is correct
10	Correct	2 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct
15	Correct	30 ms	4024 KB	Output is correct
16	Correct	28 ms	4004 KB	Output is correct
17	Correct	30 ms	4136 KB	Output is correct
18	Correct	6 ms	4436 KB	Output is correct
19	Correct	9 ms	3976 KB	Output is correct
20	Correct	35 ms	4016 KB	Output is correct
21	Correct	34 ms	4000 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	6 ms	3996 KB	Output is correct
24	Correct	6 ms	3924 KB	Output is correct
25	Correct	1 ms	2644 KB	Output is correct
26	Correct	1 ms	2644 KB	Output is correct
27	Correct	7 ms	4436 KB	Output is correct
28	Correct	6 ms	4052 KB	Output is correct
29	Correct	6 ms	4052 KB	Output is correct
30	Correct	6 ms	4052 KB	Output is correct
31	Correct	1 ms	2644 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct
33	Correct	2 ms	2644 KB	Output is correct
34	Correct	2 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct
36	Correct	112 ms	24216 KB	Output is correct
37	Correct	2 ms	2644 KB	Output is correct
38	Correct	109 ms	23920 KB	Output is correct
39	Correct	109 ms	23352 KB	Output is correct
40	Correct	116 ms	24248 KB	Output is correct
41	Correct	101 ms	24388 KB	Output is correct
42	Correct	83 ms	19408 KB	Output is correct
43	Correct	94 ms	16148 KB	Output is correct
44	Correct	109 ms	15820 KB	Output is correct
45	Correct	100 ms	15796 KB	Output is correct
46	Correct	98 ms	15792 KB	Output is correct
47	Correct	78 ms	19520 KB	Output is correct
48	Correct	76 ms	19600 KB	Output is correct
49	Correct	89 ms	20056 KB	Output is correct
50	Correct	92 ms	21124 KB	Output is correct
51	Correct	109 ms	25512 KB	Output is correct
52	Correct	104 ms	25604 KB	Output is correct
53	Correct	77 ms	17228 KB	Output is correct
54	Correct	77 ms	17144 KB	Output is correct
55	Correct	95 ms	17212 KB	Output is correct
56	Correct	98 ms	17116 KB	Output is correct
57	Correct	103 ms	16912 KB	Output is correct
58	Correct	102 ms	16968 KB	Output is correct
59	Correct	126 ms	16916 KB	Output is correct
60	Correct	102 ms	17292 KB	Output is correct
61	Correct	81 ms	20928 KB	Output is correct
62	Correct	80 ms	20940 KB	Output is correct
63	Correct	88 ms	20896 KB	Output is correct
64	Correct	98 ms	21188 KB	Output is correct
65	Correct	108 ms	16868 KB	Output is correct
66	Correct	114 ms	17060 KB	Output is correct
67	Correct	101 ms	17304 KB	Output is correct
68	Correct	65 ms	17100 KB	Output is correct
69	Correct	67 ms	17212 KB	Output is correct
70	Correct	89 ms	21440 KB	Output is correct
71	Correct	93 ms	20812 KB	Output is correct
72	Correct	2 ms	2652 KB	Output is correct
73	Correct	7 ms	4060 KB	Output is correct
74	Correct	6 ms	4112 KB	Output is correct
75	Correct	2 ms	2668 KB	Output is correct
76	Correct	2 ms	2648 KB	Output is correct
77	Correct	6 ms	4568 KB	Output is correct
78	Correct	6 ms	4240 KB	Output is correct
79	Correct	6 ms	4096 KB	Output is correct
80	Correct	6 ms	4112 KB	Output is correct
81	Correct	2 ms	2644 KB	Output is correct
82	Correct	2 ms	2696 KB	Output is correct
83	Correct	2 ms	2644 KB	Output is correct
84	Correct	2 ms	2644 KB	Output is correct
85	Correct	2 ms	2728 KB	Output is correct
86	Correct	28 ms	4472 KB	Output is correct
87	Correct	28 ms	4472 KB	Output is correct
88	Correct	31 ms	4592 KB	Output is correct
89	Correct	7 ms	4564 KB	Output is correct
90	Correct	6 ms	4104 KB	Output is correct
91	Correct	34 ms	4612 KB	Output is correct
92	Correct	38 ms	4540 KB	Output is correct
93	Correct	2 ms	2644 KB	Output is correct
94	Correct	106 ms	25320 KB	Output is correct
95	Correct	110 ms	25032 KB	Output is correct
96	Correct	97 ms	24492 KB	Output is correct
97	Correct	121 ms	25516 KB	Output is correct
98	Correct	104 ms	25496 KB	Output is correct
99	Correct	104 ms	17032 KB	Output is correct
100	Correct	99 ms	16832 KB	Output is correct
101	Correct	99 ms	16892 KB	Output is correct
102	Correct	102 ms	17212 KB	Output is correct
103	Correct	92 ms	20556 KB	Output is correct
104	Correct	95 ms	20976 KB	Output is correct
105	Correct	81 ms	20520 KB	Output is correct
106	Correct	91 ms	21384 KB	Output is correct
107	Correct	91 ms	21140 KB	Output is correct
108	Correct	99 ms	25580 KB	Output is correct
109	Correct	102 ms	25540 KB	Output is correct
110	Correct	81 ms	17132 KB	Output is correct
111	Correct	76 ms	17028 KB	Output is correct
112	Correct	100 ms	17208 KB	Output is correct
113	Correct	97 ms	17236 KB	Output is correct

답안 #536694

Compilation message

Subtask #1 8.0 / 8.0

Subtask #2 15.0 / 15.0

Subtask #3 7.0 / 7.0

Subtask #4 29.0 / 29.0

Subtask #5 16.0 / 16.0

Subtask #6 25.0 / 25.0

Subtask #1
8.0 / 8.0

Subtask #2
15.0 / 15.0

Subtask #3
7.0 / 7.0

Subtask #4
29.0 / 29.0

Subtask #5
16.0 / 16.0

Subtask #6
25.0 / 25.0