답안 #56337 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
56337	2018-07-11T05:23:45 Z	khsoo01(#2109)	Construction of Highway (JOI18_construction)	C++11	100 / 100	645 ms	82108 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	77 ms	67704 KB	Output is correct
2	Correct	73 ms	67704 KB	Output is correct
3	Correct	71 ms	67728 KB	Output is correct
4	Correct	72 ms	67824 KB	Output is correct
5	Correct	81 ms	67924 KB	Output is correct
6	Correct	65 ms	68000 KB	Output is correct
7	Correct	72 ms	68156 KB	Output is correct
8	Correct	80 ms	68156 KB	Output is correct
9	Correct	64 ms	68156 KB	Output is correct
10	Correct	65 ms	68156 KB	Output is correct
11	Correct	70 ms	68156 KB	Output is correct
12	Correct	65 ms	68156 KB	Output is correct
13	Correct	80 ms	68156 KB	Output is correct
14	Correct	80 ms	68156 KB	Output is correct
15	Correct	68 ms	68156 KB	Output is correct
16	Correct	78 ms	68156 KB	Output is correct
17	Correct	89 ms	68156 KB	Output is correct
18	Correct	73 ms	68156 KB	Output is correct
19	Correct	71 ms	68156 KB	Output is correct
20	Correct	71 ms	68156 KB	Output is correct
21	Correct	70 ms	68156 KB	Output is correct
22	Correct	74 ms	68156 KB	Output is correct
23	Correct	108 ms	68156 KB	Output is correct
24	Correct	73 ms	68156 KB	Output is correct
25	Correct	62 ms	68156 KB	Output is correct
26	Correct	60 ms	68156 KB	Output is correct
27	Correct	70 ms	68156 KB	Output is correct
28	Correct	70 ms	68156 KB	Output is correct
29	Correct	70 ms	68156 KB	Output is correct
30	Correct	93 ms	68156 KB	Output is correct
31	Correct	80 ms	68156 KB	Output is correct
32	Correct	68 ms	68156 KB	Output is correct
33	Correct	65 ms	68156 KB	Output is correct
34	Correct	63 ms	68156 KB	Output is correct
35	Correct	62 ms	68156 KB	Output is correct
36	Correct	73 ms	68156 KB	Output is correct
37	Correct	62 ms	68156 KB	Output is correct
38	Correct	75 ms	68156 KB	Output is correct
39	Correct	70 ms	68156 KB	Output is correct
40	Correct	73 ms	68156 KB	Output is correct
41	Correct	69 ms	68156 KB	Output is correct
42	Correct	76 ms	68156 KB	Output is correct
43	Correct	74 ms	68156 KB	Output is correct
44	Correct	87 ms	68156 KB	Output is correct

Subtask #2
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	77 ms	67704 KB	Output is correct
2	Correct	73 ms	67704 KB	Output is correct
3	Correct	71 ms	67728 KB	Output is correct
4	Correct	72 ms	67824 KB	Output is correct
5	Correct	81 ms	67924 KB	Output is correct
6	Correct	65 ms	68000 KB	Output is correct
7	Correct	72 ms	68156 KB	Output is correct
8	Correct	80 ms	68156 KB	Output is correct
9	Correct	64 ms	68156 KB	Output is correct
10	Correct	65 ms	68156 KB	Output is correct
11	Correct	70 ms	68156 KB	Output is correct
12	Correct	65 ms	68156 KB	Output is correct
13	Correct	80 ms	68156 KB	Output is correct
14	Correct	80 ms	68156 KB	Output is correct
15	Correct	68 ms	68156 KB	Output is correct
16	Correct	78 ms	68156 KB	Output is correct
17	Correct	89 ms	68156 KB	Output is correct
18	Correct	73 ms	68156 KB	Output is correct
19	Correct	71 ms	68156 KB	Output is correct
20	Correct	71 ms	68156 KB	Output is correct
21	Correct	70 ms	68156 KB	Output is correct
22	Correct	74 ms	68156 KB	Output is correct
23	Correct	108 ms	68156 KB	Output is correct
24	Correct	73 ms	68156 KB	Output is correct
25	Correct	62 ms	68156 KB	Output is correct
26	Correct	60 ms	68156 KB	Output is correct
27	Correct	70 ms	68156 KB	Output is correct
28	Correct	70 ms	68156 KB	Output is correct
29	Correct	70 ms	68156 KB	Output is correct
30	Correct	93 ms	68156 KB	Output is correct
31	Correct	80 ms	68156 KB	Output is correct
32	Correct	68 ms	68156 KB	Output is correct
33	Correct	65 ms	68156 KB	Output is correct
34	Correct	63 ms	68156 KB	Output is correct
35	Correct	62 ms	68156 KB	Output is correct
36	Correct	73 ms	68156 KB	Output is correct
37	Correct	62 ms	68156 KB	Output is correct
38	Correct	75 ms	68156 KB	Output is correct
39	Correct	70 ms	68156 KB	Output is correct
40	Correct	73 ms	68156 KB	Output is correct
41	Correct	69 ms	68156 KB	Output is correct
42	Correct	76 ms	68156 KB	Output is correct
43	Correct	74 ms	68156 KB	Output is correct
44	Correct	87 ms	68156 KB	Output is correct
45	Correct	77 ms	68156 KB	Output is correct
46	Correct	80 ms	68220 KB	Output is correct
47	Correct	106 ms	68340 KB	Output is correct
48	Correct	88 ms	68340 KB	Output is correct
49	Correct	72 ms	68508 KB	Output is correct
50	Correct	70 ms	68508 KB	Output is correct
51	Correct	109 ms	68524 KB	Output is correct
52	Correct	81 ms	68524 KB	Output is correct
53	Correct	92 ms	68540 KB	Output is correct
54	Correct	81 ms	68540 KB	Output is correct
55	Correct	80 ms	68540 KB	Output is correct
56	Correct	80 ms	68540 KB	Output is correct
57	Correct	116 ms	68540 KB	Output is correct
58	Correct	89 ms	68540 KB	Output is correct
59	Correct	134 ms	68540 KB	Output is correct
60	Correct	77 ms	68540 KB	Output is correct
61	Correct	71 ms	68540 KB	Output is correct
62	Correct	72 ms	68540 KB	Output is correct
63	Correct	107 ms	68540 KB	Output is correct
64	Correct	83 ms	68540 KB	Output is correct
65	Correct	75 ms	68540 KB	Output is correct
66	Correct	85 ms	68540 KB	Output is correct
67	Correct	83 ms	68540 KB	Output is correct
68	Correct	83 ms	68540 KB	Output is correct
69	Correct	83 ms	68540 KB	Output is correct
70	Correct	103 ms	68540 KB	Output is correct
71	Correct	80 ms	68540 KB	Output is correct
72	Correct	80 ms	68540 KB	Output is correct
73	Correct	82 ms	68540 KB	Output is correct
74	Correct	83 ms	68540 KB	Output is correct
75	Correct	83 ms	68540 KB	Output is correct
76	Correct	95 ms	68540 KB	Output is correct
77	Correct	70 ms	68540 KB	Output is correct
78	Correct	72 ms	68540 KB	Output is correct
79	Correct	85 ms	68540 KB	Output is correct
80	Correct	99 ms	68540 KB	Output is correct
81	Correct	79 ms	68540 KB	Output is correct
82	Correct	81 ms	68540 KB	Output is correct
83	Correct	78 ms	68540 KB	Output is correct
84	Correct	81 ms	68540 KB	Output is correct
85	Correct	85 ms	68540 KB	Output is correct
86	Correct	87 ms	68540 KB	Output is correct

Subtask #3
84.0 / 84.0

#	결과	실행 시간	메모리	Grader output
1	Correct	77 ms	67704 KB	Output is correct
2	Correct	73 ms	67704 KB	Output is correct
3	Correct	71 ms	67728 KB	Output is correct
4	Correct	72 ms	67824 KB	Output is correct
5	Correct	81 ms	67924 KB	Output is correct
6	Correct	65 ms	68000 KB	Output is correct
7	Correct	72 ms	68156 KB	Output is correct
8	Correct	80 ms	68156 KB	Output is correct
9	Correct	64 ms	68156 KB	Output is correct
10	Correct	65 ms	68156 KB	Output is correct
11	Correct	70 ms	68156 KB	Output is correct
12	Correct	65 ms	68156 KB	Output is correct
13	Correct	80 ms	68156 KB	Output is correct
14	Correct	80 ms	68156 KB	Output is correct
15	Correct	68 ms	68156 KB	Output is correct
16	Correct	78 ms	68156 KB	Output is correct
17	Correct	89 ms	68156 KB	Output is correct
18	Correct	73 ms	68156 KB	Output is correct
19	Correct	71 ms	68156 KB	Output is correct
20	Correct	71 ms	68156 KB	Output is correct
21	Correct	70 ms	68156 KB	Output is correct
22	Correct	74 ms	68156 KB	Output is correct
23	Correct	108 ms	68156 KB	Output is correct
24	Correct	73 ms	68156 KB	Output is correct
25	Correct	62 ms	68156 KB	Output is correct
26	Correct	60 ms	68156 KB	Output is correct
27	Correct	70 ms	68156 KB	Output is correct
28	Correct	70 ms	68156 KB	Output is correct
29	Correct	70 ms	68156 KB	Output is correct
30	Correct	93 ms	68156 KB	Output is correct
31	Correct	80 ms	68156 KB	Output is correct
32	Correct	68 ms	68156 KB	Output is correct
33	Correct	65 ms	68156 KB	Output is correct
34	Correct	63 ms	68156 KB	Output is correct
35	Correct	62 ms	68156 KB	Output is correct
36	Correct	73 ms	68156 KB	Output is correct
37	Correct	62 ms	68156 KB	Output is correct
38	Correct	75 ms	68156 KB	Output is correct
39	Correct	70 ms	68156 KB	Output is correct
40	Correct	73 ms	68156 KB	Output is correct
41	Correct	69 ms	68156 KB	Output is correct
42	Correct	76 ms	68156 KB	Output is correct
43	Correct	74 ms	68156 KB	Output is correct
44	Correct	87 ms	68156 KB	Output is correct
45	Correct	77 ms	68156 KB	Output is correct
46	Correct	80 ms	68220 KB	Output is correct
47	Correct	106 ms	68340 KB	Output is correct
48	Correct	88 ms	68340 KB	Output is correct
49	Correct	72 ms	68508 KB	Output is correct
50	Correct	70 ms	68508 KB	Output is correct
51	Correct	109 ms	68524 KB	Output is correct
52	Correct	81 ms	68524 KB	Output is correct
53	Correct	92 ms	68540 KB	Output is correct
54	Correct	81 ms	68540 KB	Output is correct
55	Correct	80 ms	68540 KB	Output is correct
56	Correct	80 ms	68540 KB	Output is correct
57	Correct	116 ms	68540 KB	Output is correct
58	Correct	89 ms	68540 KB	Output is correct
59	Correct	134 ms	68540 KB	Output is correct
60	Correct	77 ms	68540 KB	Output is correct
61	Correct	71 ms	68540 KB	Output is correct
62	Correct	72 ms	68540 KB	Output is correct
63	Correct	107 ms	68540 KB	Output is correct
64	Correct	83 ms	68540 KB	Output is correct
65	Correct	75 ms	68540 KB	Output is correct
66	Correct	85 ms	68540 KB	Output is correct
67	Correct	83 ms	68540 KB	Output is correct
68	Correct	83 ms	68540 KB	Output is correct
69	Correct	83 ms	68540 KB	Output is correct
70	Correct	103 ms	68540 KB	Output is correct
71	Correct	80 ms	68540 KB	Output is correct
72	Correct	80 ms	68540 KB	Output is correct
73	Correct	82 ms	68540 KB	Output is correct
74	Correct	83 ms	68540 KB	Output is correct
75	Correct	83 ms	68540 KB	Output is correct
76	Correct	95 ms	68540 KB	Output is correct
77	Correct	70 ms	68540 KB	Output is correct
78	Correct	72 ms	68540 KB	Output is correct
79	Correct	85 ms	68540 KB	Output is correct
80	Correct	99 ms	68540 KB	Output is correct
81	Correct	79 ms	68540 KB	Output is correct
82	Correct	81 ms	68540 KB	Output is correct
83	Correct	78 ms	68540 KB	Output is correct
84	Correct	81 ms	68540 KB	Output is correct
85	Correct	85 ms	68540 KB	Output is correct
86	Correct	87 ms	68540 KB	Output is correct
87	Correct	90 ms	68776 KB	Output is correct
88	Correct	149 ms	70340 KB	Output is correct
89	Correct	590 ms	75720 KB	Output is correct
90	Correct	542 ms	75720 KB	Output is correct
91	Correct	446 ms	75720 KB	Output is correct
92	Correct	249 ms	82108 KB	Output is correct
93	Correct	254 ms	82108 KB	Output is correct
94	Correct	218 ms	82108 KB	Output is correct
95	Correct	328 ms	82108 KB	Output is correct
96	Correct	241 ms	82108 KB	Output is correct
97	Correct	228 ms	82108 KB	Output is correct
98	Correct	209 ms	82108 KB	Output is correct
99	Correct	262 ms	82108 KB	Output is correct
100	Correct	571 ms	82108 KB	Output is correct
101	Correct	645 ms	82108 KB	Output is correct
102	Correct	629 ms	82108 KB	Output is correct
103	Correct	591 ms	82108 KB	Output is correct
104	Correct	182 ms	82108 KB	Output is correct
105	Correct	334 ms	82108 KB	Output is correct
106	Correct	238 ms	82108 KB	Output is correct
107	Correct	471 ms	82108 KB	Output is correct
108	Correct	571 ms	82108 KB	Output is correct
109	Correct	506 ms	82108 KB	Output is correct
110	Correct	196 ms	82108 KB	Output is correct
111	Correct	267 ms	82108 KB	Output is correct
112	Correct	238 ms	82108 KB	Output is correct
113	Correct	194 ms	82108 KB	Output is correct
114	Correct	433 ms	82108 KB	Output is correct
115	Correct	483 ms	82108 KB	Output is correct
116	Correct	233 ms	82108 KB	Output is correct
117	Correct	233 ms	82108 KB	Output is correct
118	Correct	190 ms	82108 KB	Output is correct
119	Correct	190 ms	82108 KB	Output is correct
120	Correct	196 ms	82108 KB	Output is correct
121	Correct	213 ms	82108 KB	Output is correct
122	Correct	236 ms	82108 KB	Output is correct
123	Correct	306 ms	82108 KB	Output is correct
124	Correct	221 ms	82108 KB	Output is correct
125	Correct	238 ms	82108 KB	Output is correct
126	Correct	333 ms	82108 KB	Output is correct
127	Correct	242 ms	82108 KB	Output is correct
128	Correct	283 ms	82108 KB	Output is correct

답안 #56337

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