답안 #56335 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
56335	2018-07-11T05:22:31 Z	khsoo01(#2109)	Construction of Highway (JOI18_construction)	C++11	100 / 100	750 ms	81956 KB

construction

#include <bits/stdc++.h>
using namespace std;

const int NMAX=100000;
const int BS=17;

int Par[NMAX],Dep[NMAX],X[NMAX],dep[NMAX],par[NMAX],S[NMAX];

int n;
vector<vector<int> > e;

void dfs(int i)
{
  S[i]=0;
  for(int x=0;x<e[i].size();x++){
    int j=e[i][x];
    dep[j]=dep[i]+1;
    par[j]=i;
    dfs(j);
    S[i]+=S[j];
  }
}

void HLD()
{
  dep[0]=0;
  par[0]=-1;
  dfs(0);
  int NX=0;
  Par[0]=0;
  Dep[0]=0;
  stack<int> ST;
  ST.push(0);
  while(!ST.empty()){
    int i=ST.top();
    ST.pop();
    X[i]=NX;
    NX++;
    int K=-1;
    for(int j=0;j<e[i].size();j++){
      int k=e[i][j];
      if(K==-1||S[K]<S[k]){
	K=k;
      }
    }
    if(K==-1)continue;
    Par[K]=Par[i];
    Dep[K]=Dep[i]+1;
    for(int j=0;j<e[i].size();j++){
      int k=e[i][j];
      if(k==K)continue;
      Par[k]=k;
      Dep[k]=0;
      ST.push(k);
    }
    ST.push(K);
  }
}

stack<pair<int,int> > St[NMAX];

long long bit[1<<BS];
void bitadd(int N,int i,long long v)
{
  int p=i+1;
  while(p<1<<N){
    bit[p]+=v;
    p+=p&-p;
  }
}
long long bitsum(int N,int i)
{
  int p=i+1;
  long long ret=0;
  while(p>0){
    ret+=bit[p];
    p-=p&-p;
  }
  return ret;
}

long long cal_inv(vector<pair<int,int> > &V)
{
  int n=V.size(),N=0;
  while((1<<N)<=n)N++;
  vector<int> X(n);
  for(int i=0;i<n;i++)X[i]=V[i].first;
  sort(X.begin(),X.end());
  for(int i=0;i<n;i++)V[i].first=lower_bound(X.begin(),X.end(),V[i].first)-X.begin();
  for(int i=0;i<(1<<N);i++)bit[i]=0;
  long long ret=0ll;
  for(int t=0;t<n;t++){
    ret+=bitsum(N,V[t].first-1)*V[t].second;
    bitadd(N,V[t].first,V[t].second);
  }
  return ret;
}

int main()
{
  scanf("%d",&n);
  vector<int> C(n);
  for(int i=0;i<n;i++){
    scanf("%d",&(C[i]));
  }
  vector<int> A(n-1),B(n-1);
  for(int i=0;i<n-1;i++){
    scanf("%d%d",&(A[i]),&(B[i]));
    A[i]--,B[i]--;
  }
  e=vector<vector<int> >(n);
  for(int i=0;i<n-1;i++){
    e[A[i]].push_back(B[i]);
  }
  HLD();
  for(int T=0;T<n-1;T++){
    int p=B[T],c=C[p];
    vector<pair<int,int> > V;
    while(p!=-1){
      int d=Dep[p]+1,t=0;
      p=Par[p];
      stack<pair<int,int> > &S=St[p];
      vector<pair<int,int> > V2;
      while(!S.empty()&&S.top().second<=d){
	pair<int,int> pr=S.top();
	S.pop();
	V2.push_back(make_pair(pr.first,pr.second-t));
	t=pr.second;
      }
      if(!S.empty()){
	V2.push_back(make_pair(S.top().first,d-t));
      }
      S.push(make_pair(c,d));
      for(int x=V2.size()-1;x>=0;x--)V.push_back(V2[x]);
      p=par[p];
    }
    printf("%lld\n",cal_inv(V));
  }
  return 0;
}

Compilation message

construction.cpp: In function 'void dfs(int)':
construction.cpp:15:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int x=0;x<e[i].size();x++){
               ~^~~~~~~~~~~~
construction.cpp: In function 'void HLD()':
construction.cpp:40:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j=0;j<e[i].size();j++){
                 ~^~~~~~~~~~~~
construction.cpp:49:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j=0;j<e[i].size();j++){
                 ~^~~~~~~~~~~~
construction.cpp: In function 'int main()':
construction.cpp:101:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&n);
   ~~~~~^~~~~~~~~
construction.cpp:104:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&(C[i]));
     ~~~~~^~~~~~~~~~~~~~
construction.cpp:108:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&(A[i]),&(B[i]));
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	71 ms	67576 KB	Output is correct
2	Correct	72 ms	67684 KB	Output is correct
3	Correct	74 ms	67736 KB	Output is correct
4	Correct	69 ms	67808 KB	Output is correct
5	Correct	76 ms	68100 KB	Output is correct
6	Correct	71 ms	68100 KB	Output is correct
7	Correct	75 ms	68100 KB	Output is correct
8	Correct	70 ms	68100 KB	Output is correct
9	Correct	69 ms	68100 KB	Output is correct
10	Correct	69 ms	68100 KB	Output is correct
11	Correct	71 ms	68100 KB	Output is correct
12	Correct	67 ms	68100 KB	Output is correct
13	Correct	73 ms	68100 KB	Output is correct
14	Correct	134 ms	68100 KB	Output is correct
15	Correct	71 ms	68100 KB	Output is correct
16	Correct	72 ms	68100 KB	Output is correct
17	Correct	74 ms	68100 KB	Output is correct
18	Correct	70 ms	68100 KB	Output is correct
19	Correct	60 ms	68100 KB	Output is correct
20	Correct	62 ms	68100 KB	Output is correct
21	Correct	70 ms	68100 KB	Output is correct
22	Correct	70 ms	68100 KB	Output is correct
23	Correct	72 ms	68100 KB	Output is correct
24	Correct	69 ms	68100 KB	Output is correct
25	Correct	60 ms	68100 KB	Output is correct
26	Correct	64 ms	68100 KB	Output is correct
27	Correct	64 ms	68100 KB	Output is correct
28	Correct	63 ms	68100 KB	Output is correct
29	Correct	63 ms	68100 KB	Output is correct
30	Correct	77 ms	68100 KB	Output is correct
31	Correct	71 ms	68100 KB	Output is correct
32	Correct	69 ms	68100 KB	Output is correct
33	Correct	61 ms	68100 KB	Output is correct
34	Correct	73 ms	68100 KB	Output is correct
35	Correct	61 ms	68120 KB	Output is correct
36	Correct	61 ms	68120 KB	Output is correct
37	Correct	62 ms	68120 KB	Output is correct
38	Correct	73 ms	68120 KB	Output is correct
39	Correct	74 ms	68120 KB	Output is correct
40	Correct	69 ms	68120 KB	Output is correct
41	Correct	70 ms	68120 KB	Output is correct
42	Correct	67 ms	68120 KB	Output is correct
43	Correct	82 ms	68120 KB	Output is correct
44	Correct	70 ms	68120 KB	Output is correct

Subtask #2
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	71 ms	67576 KB	Output is correct
2	Correct	72 ms	67684 KB	Output is correct
3	Correct	74 ms	67736 KB	Output is correct
4	Correct	69 ms	67808 KB	Output is correct
5	Correct	76 ms	68100 KB	Output is correct
6	Correct	71 ms	68100 KB	Output is correct
7	Correct	75 ms	68100 KB	Output is correct
8	Correct	70 ms	68100 KB	Output is correct
9	Correct	69 ms	68100 KB	Output is correct
10	Correct	69 ms	68100 KB	Output is correct
11	Correct	71 ms	68100 KB	Output is correct
12	Correct	67 ms	68100 KB	Output is correct
13	Correct	73 ms	68100 KB	Output is correct
14	Correct	134 ms	68100 KB	Output is correct
15	Correct	71 ms	68100 KB	Output is correct
16	Correct	72 ms	68100 KB	Output is correct
17	Correct	74 ms	68100 KB	Output is correct
18	Correct	70 ms	68100 KB	Output is correct
19	Correct	60 ms	68100 KB	Output is correct
20	Correct	62 ms	68100 KB	Output is correct
21	Correct	70 ms	68100 KB	Output is correct
22	Correct	70 ms	68100 KB	Output is correct
23	Correct	72 ms	68100 KB	Output is correct
24	Correct	69 ms	68100 KB	Output is correct
25	Correct	60 ms	68100 KB	Output is correct
26	Correct	64 ms	68100 KB	Output is correct
27	Correct	64 ms	68100 KB	Output is correct
28	Correct	63 ms	68100 KB	Output is correct
29	Correct	63 ms	68100 KB	Output is correct
30	Correct	77 ms	68100 KB	Output is correct
31	Correct	71 ms	68100 KB	Output is correct
32	Correct	69 ms	68100 KB	Output is correct
33	Correct	61 ms	68100 KB	Output is correct
34	Correct	73 ms	68100 KB	Output is correct
35	Correct	61 ms	68120 KB	Output is correct
36	Correct	61 ms	68120 KB	Output is correct
37	Correct	62 ms	68120 KB	Output is correct
38	Correct	73 ms	68120 KB	Output is correct
39	Correct	74 ms	68120 KB	Output is correct
40	Correct	69 ms	68120 KB	Output is correct
41	Correct	70 ms	68120 KB	Output is correct
42	Correct	67 ms	68120 KB	Output is correct
43	Correct	82 ms	68120 KB	Output is correct
44	Correct	70 ms	68120 KB	Output is correct
45	Correct	73 ms	68120 KB	Output is correct
46	Correct	86 ms	68288 KB	Output is correct
47	Correct	104 ms	68288 KB	Output is correct
48	Correct	82 ms	68288 KB	Output is correct
49	Correct	84 ms	68440 KB	Output is correct
50	Correct	102 ms	68508 KB	Output is correct
51	Correct	71 ms	68508 KB	Output is correct
52	Correct	76 ms	68508 KB	Output is correct
53	Correct	79 ms	68508 KB	Output is correct
54	Correct	89 ms	68508 KB	Output is correct
55	Correct	91 ms	68508 KB	Output is correct
56	Correct	117 ms	68508 KB	Output is correct
57	Correct	101 ms	68508 KB	Output is correct
58	Correct	87 ms	68508 KB	Output is correct
59	Correct	76 ms	68508 KB	Output is correct
60	Correct	76 ms	68508 KB	Output is correct
61	Correct	71 ms	68508 KB	Output is correct
62	Correct	82 ms	68540 KB	Output is correct
63	Correct	74 ms	68540 KB	Output is correct
64	Correct	109 ms	68540 KB	Output is correct
65	Correct	85 ms	68540 KB	Output is correct
66	Correct	86 ms	68540 KB	Output is correct
67	Correct	80 ms	68540 KB	Output is correct
68	Correct	73 ms	68592 KB	Output is correct
69	Correct	78 ms	68592 KB	Output is correct
70	Correct	79 ms	68592 KB	Output is correct
71	Correct	76 ms	68592 KB	Output is correct
72	Correct	92 ms	68592 KB	Output is correct
73	Correct	96 ms	68592 KB	Output is correct
74	Correct	84 ms	68592 KB	Output is correct
75	Correct	74 ms	68592 KB	Output is correct
76	Correct	79 ms	68592 KB	Output is correct
77	Correct	81 ms	68592 KB	Output is correct
78	Correct	88 ms	68592 KB	Output is correct
79	Correct	70 ms	68592 KB	Output is correct
80	Correct	71 ms	68592 KB	Output is correct
81	Correct	72 ms	68592 KB	Output is correct
82	Correct	85 ms	68592 KB	Output is correct
83	Correct	108 ms	68592 KB	Output is correct
84	Correct	77 ms	68592 KB	Output is correct
85	Correct	89 ms	68592 KB	Output is correct
86	Correct	89 ms	68592 KB	Output is correct

Subtask #3
84.0 / 84.0

#	결과	실행 시간	메모리	Grader output
1	Correct	71 ms	67576 KB	Output is correct
2	Correct	72 ms	67684 KB	Output is correct
3	Correct	74 ms	67736 KB	Output is correct
4	Correct	69 ms	67808 KB	Output is correct
5	Correct	76 ms	68100 KB	Output is correct
6	Correct	71 ms	68100 KB	Output is correct
7	Correct	75 ms	68100 KB	Output is correct
8	Correct	70 ms	68100 KB	Output is correct
9	Correct	69 ms	68100 KB	Output is correct
10	Correct	69 ms	68100 KB	Output is correct
11	Correct	71 ms	68100 KB	Output is correct
12	Correct	67 ms	68100 KB	Output is correct
13	Correct	73 ms	68100 KB	Output is correct
14	Correct	134 ms	68100 KB	Output is correct
15	Correct	71 ms	68100 KB	Output is correct
16	Correct	72 ms	68100 KB	Output is correct
17	Correct	74 ms	68100 KB	Output is correct
18	Correct	70 ms	68100 KB	Output is correct
19	Correct	60 ms	68100 KB	Output is correct
20	Correct	62 ms	68100 KB	Output is correct
21	Correct	70 ms	68100 KB	Output is correct
22	Correct	70 ms	68100 KB	Output is correct
23	Correct	72 ms	68100 KB	Output is correct
24	Correct	69 ms	68100 KB	Output is correct
25	Correct	60 ms	68100 KB	Output is correct
26	Correct	64 ms	68100 KB	Output is correct
27	Correct	64 ms	68100 KB	Output is correct
28	Correct	63 ms	68100 KB	Output is correct
29	Correct	63 ms	68100 KB	Output is correct
30	Correct	77 ms	68100 KB	Output is correct
31	Correct	71 ms	68100 KB	Output is correct
32	Correct	69 ms	68100 KB	Output is correct
33	Correct	61 ms	68100 KB	Output is correct
34	Correct	73 ms	68100 KB	Output is correct
35	Correct	61 ms	68120 KB	Output is correct
36	Correct	61 ms	68120 KB	Output is correct
37	Correct	62 ms	68120 KB	Output is correct
38	Correct	73 ms	68120 KB	Output is correct
39	Correct	74 ms	68120 KB	Output is correct
40	Correct	69 ms	68120 KB	Output is correct
41	Correct	70 ms	68120 KB	Output is correct
42	Correct	67 ms	68120 KB	Output is correct
43	Correct	82 ms	68120 KB	Output is correct
44	Correct	70 ms	68120 KB	Output is correct
45	Correct	73 ms	68120 KB	Output is correct
46	Correct	86 ms	68288 KB	Output is correct
47	Correct	104 ms	68288 KB	Output is correct
48	Correct	82 ms	68288 KB	Output is correct
49	Correct	84 ms	68440 KB	Output is correct
50	Correct	102 ms	68508 KB	Output is correct
51	Correct	71 ms	68508 KB	Output is correct
52	Correct	76 ms	68508 KB	Output is correct
53	Correct	79 ms	68508 KB	Output is correct
54	Correct	89 ms	68508 KB	Output is correct
55	Correct	91 ms	68508 KB	Output is correct
56	Correct	117 ms	68508 KB	Output is correct
57	Correct	101 ms	68508 KB	Output is correct
58	Correct	87 ms	68508 KB	Output is correct
59	Correct	76 ms	68508 KB	Output is correct
60	Correct	76 ms	68508 KB	Output is correct
61	Correct	71 ms	68508 KB	Output is correct
62	Correct	82 ms	68540 KB	Output is correct
63	Correct	74 ms	68540 KB	Output is correct
64	Correct	109 ms	68540 KB	Output is correct
65	Correct	85 ms	68540 KB	Output is correct
66	Correct	86 ms	68540 KB	Output is correct
67	Correct	80 ms	68540 KB	Output is correct
68	Correct	73 ms	68592 KB	Output is correct
69	Correct	78 ms	68592 KB	Output is correct
70	Correct	79 ms	68592 KB	Output is correct
71	Correct	76 ms	68592 KB	Output is correct
72	Correct	92 ms	68592 KB	Output is correct
73	Correct	96 ms	68592 KB	Output is correct
74	Correct	84 ms	68592 KB	Output is correct
75	Correct	74 ms	68592 KB	Output is correct
76	Correct	79 ms	68592 KB	Output is correct
77	Correct	81 ms	68592 KB	Output is correct
78	Correct	88 ms	68592 KB	Output is correct
79	Correct	70 ms	68592 KB	Output is correct
80	Correct	71 ms	68592 KB	Output is correct
81	Correct	72 ms	68592 KB	Output is correct
82	Correct	85 ms	68592 KB	Output is correct
83	Correct	108 ms	68592 KB	Output is correct
84	Correct	77 ms	68592 KB	Output is correct
85	Correct	89 ms	68592 KB	Output is correct
86	Correct	89 ms	68592 KB	Output is correct
87	Correct	88 ms	68796 KB	Output is correct
88	Correct	159 ms	70480 KB	Output is correct
89	Correct	467 ms	76092 KB	Output is correct
90	Correct	566 ms	76092 KB	Output is correct
91	Correct	407 ms	76092 KB	Output is correct
92	Correct	231 ms	81956 KB	Output is correct
93	Correct	233 ms	81956 KB	Output is correct
94	Correct	230 ms	81956 KB	Output is correct
95	Correct	245 ms	81956 KB	Output is correct
96	Correct	244 ms	81956 KB	Output is correct
97	Correct	295 ms	81956 KB	Output is correct
98	Correct	259 ms	81956 KB	Output is correct
99	Correct	235 ms	81956 KB	Output is correct
100	Correct	642 ms	81956 KB	Output is correct
101	Correct	750 ms	81956 KB	Output is correct
102	Correct	705 ms	81956 KB	Output is correct
103	Correct	591 ms	81956 KB	Output is correct
104	Correct	240 ms	81956 KB	Output is correct
105	Correct	196 ms	81956 KB	Output is correct
106	Correct	244 ms	81956 KB	Output is correct
107	Correct	459 ms	81956 KB	Output is correct
108	Correct	421 ms	81956 KB	Output is correct
109	Correct	436 ms	81956 KB	Output is correct
110	Correct	224 ms	81956 KB	Output is correct
111	Correct	241 ms	81956 KB	Output is correct
112	Correct	211 ms	81956 KB	Output is correct
113	Correct	225 ms	81956 KB	Output is correct
114	Correct	546 ms	81956 KB	Output is correct
115	Correct	574 ms	81956 KB	Output is correct
116	Correct	226 ms	81956 KB	Output is correct
117	Correct	263 ms	81956 KB	Output is correct
118	Correct	296 ms	81956 KB	Output is correct
119	Correct	237 ms	81956 KB	Output is correct
120	Correct	270 ms	81956 KB	Output is correct
121	Correct	231 ms	81956 KB	Output is correct
122	Correct	304 ms	81956 KB	Output is correct
123	Correct	221 ms	81956 KB	Output is correct
124	Correct	281 ms	81956 KB	Output is correct
125	Correct	236 ms	81956 KB	Output is correct
126	Correct	240 ms	81956 KB	Output is correct
127	Correct	217 ms	81956 KB	Output is correct
128	Correct	245 ms	81956 KB	Output is correct

답안 #56335

Compilation message

Subtask #1 7.0 / 7.0

Subtask #2 9.0 / 9.0

Subtask #3 84.0 / 84.0

Subtask #1
7.0 / 7.0

Subtask #2
9.0 / 9.0

Subtask #3
84.0 / 84.0