oj.uz

Submission #101066

# Submission time Handle Problem Language Result Execution time Memory
101066 2019-03-16T08:54:47 Z Pro_ktmr Long Mansion (JOI17_long_mansion) C++14
100 / 100
 654 ms 81068 KB 
#include<bits/stdc++.h>
using namespace std;

template<class T> void chmin(T& a,const T& b) { if(a>b) a=b; }
template<class T> void chmax(T& a,const T& b) { if(a<b) a=b; }

typedef pair<int,int> pi;

const int INF=5e8;
const int MAX_N=500005;

struct uf{
  int par[MAX_N];
  int size[MAX_N];
  void init(){
    memset(par,-1,sizeof(par));
    for(int i=1;i<MAX_N;++i) size[i]=1;
  }
  int root(int a){
    if(par[a]==-1) return a;
    return par[a]=root(par[a]);
  }
  void unite(int a,int b){
    a=root(a);b=root(b);
    if(a==b) return;

    par[b]=a;
    size[a]+=size[b];
  }
  bool same(int a,int b){
    return root(a)==root(b);
  }
};
uf u;

int n,q;
int ar[MAX_N];
vector<int> keys[MAX_N];

pi query[MAX_N];

bool vis[MAX_N];
pi memo[MAX_N];
vector<int> pos[MAX_N];
bool open(int id,int l,int r){
  return (*lower_bound(pos[id].begin(),pos[id].end(),l)<=r);
}
pair<int,pi> rec(int p){//(id,(l,r))
  if(vis[p]){
    return {p,{p,p}};
  }
  if(memo[p].first>=0){
    return {-1,memo[p]};
  }
  if(u.root(p)!=p){
    return rec(u.root(p));
  }
  vis[p]=1;
  int l=p,r=p;
  while(1){
    if(l>0 && open(ar[l-1],l,r)){
      auto range=rec(l-1);
      chmin(l,range.second.first);
      chmax(r,range.second.second);
      if(range.first>=0 && range.first!=p){
        u.unite(range.first,p);
        vis[p]=false;
        return {range.first,{l,r}};
      }
      continue;
    }
    if(r+1<n && open(ar[r],l,r)){
      auto range=rec(r+1);
      chmin(l,range.second.first);
      chmax(r,range.second.second);
      if(range.first>=0 && range.first!=p){
        u.unite(range.first,p);
        vis[p]=false;
        return {range.first,{l,r}};
      }
      continue;
    }
    break;
  }
  vis[p]=0;
  return {-1, memo[p]={l,r} };
}
int main(){
  u.init();
  cin>>n;
  for(int i=0;i<n-1;++i) scanf("%d",&ar[i]),--ar[i];
  int sum=0;
  for(int i=0;i<n;++i){
    int K;scanf("%d",&K);
    keys[i].resize(K);
    sum+=K;
    for(int j=0;j<K;++j){
      scanf("%d",&keys[i][j]);
      --keys[i][j];
      pos[keys[i][j]].push_back(i);
    }
  }
  for(int i=0;i<n;++i) pos[i].push_back(INF);
  memset(memo,-1,sizeof(memo));
  for(int i=0;i<n;++i) rec(i);
  for(int i=0;i<n;++i) if(u.root(i)!=i){
    memo[i]=memo[u.root(i)];
  }
  cin>>q;
  for(int i=0;i<q;++i){
    int l,r;scanf("%d%d",&l,&r);--l;--r;
    if(memo[l].first<=r && r<=memo[l].second) puts("YES");
    else puts("NO");
  }
  return 0;
}

Compilation message

long_mansion.cpp: In function 'int main()':
long_mansion.cpp:91:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for(int i=0;i<n-1;++i) scanf("%d",&ar[i]),--ar[i];
                          ~~~~~~~~~~~~~~~~~~^~~~~~~~
long_mansion.cpp:94:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int K;scanf("%d",&K);
           ~~~~~^~~~~~~~~
long_mansion.cpp:98:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d",&keys[i][j]);
       ~~~~~^~~~~~~~~~~~~~~~~~
long_mansion.cpp:111:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int l,r;scanf("%d%d",&l,&r);--l;--r;
             ~~~~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 31864 KB Output is correct
2 Correct 34 ms 31992 KB Output is correct
3 Correct 43 ms 32248 KB Output is correct
4 Correct 42 ms 31864 KB Output is correct
5 Correct 33 ms 31864 KB Output is correct
6 Correct 35 ms 31872 KB Output is correct
7 Correct 45 ms 31864 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 31864 KB Output is correct
2 Correct 34 ms 31992 KB Output is correct
3 Correct 43 ms 32248 KB Output is correct
4 Correct 42 ms 31864 KB Output is correct
5 Correct 33 ms 31864 KB Output is correct
6 Correct 35 ms 31872 KB Output is correct
7 Correct 45 ms 31864 KB Output is correct
8 Correct 174 ms 37776 KB Output is correct
9 Correct 156 ms 37700 KB Output is correct
10 Correct 170 ms 38008 KB Output is correct
11 Correct 176 ms 38524 KB Output is correct
12 Correct 161 ms 37368 KB Output is correct
13 Correct 196 ms 37924 KB Output is correct
14 Correct 170 ms 37852 KB Output is correct
15 Correct 172 ms 38008 KB Output is correct
16 Correct 144 ms 37752 KB Output is correct
17 Correct 157 ms 37880 KB Output is correct
18 Correct 170 ms 37980 KB Output is correct
19 Correct 165 ms 37892 KB Output is correct
20 Correct 172 ms 38008 KB Output is correct
21 Correct 155 ms 37752 KB Output is correct
22 Correct 141 ms 37752 KB Output is correct
23 Correct 145 ms 37708 KB Output is correct
24 Correct 157 ms 37672 KB Output is correct
25 Correct 150 ms 37772 KB Output is correct
26 Correct 182 ms 37752 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 418 ms 47844 KB Output is correct
2 Correct 358 ms 49144 KB Output is correct
3 Correct 332 ms 48828 KB Output is correct
4 Correct 363 ms 49396 KB Output is correct
5 Correct 358 ms 49260 KB Output is correct
6 Correct 265 ms 47608 KB Output is correct
7 Correct 303 ms 47532 KB Output is correct
8 Correct 283 ms 47488 KB Output is correct
9 Correct 355 ms 47452 KB Output is correct
10 Correct 253 ms 47412 KB Output is correct
11 Correct 257 ms 47352 KB Output is correct

Subtask #4
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 31864 KB Output is correct
2 Correct 34 ms 31992 KB Output is correct
3 Correct 43 ms 32248 KB Output is correct
4 Correct 42 ms 31864 KB Output is correct
5 Correct 33 ms 31864 KB Output is correct
6 Correct 35 ms 31872 KB Output is correct
7 Correct 45 ms 31864 KB Output is correct
8 Correct 174 ms 37776 KB Output is correct
9 Correct 156 ms 37700 KB Output is correct
10 Correct 170 ms 38008 KB Output is correct
11 Correct 176 ms 38524 KB Output is correct
12 Correct 161 ms 37368 KB Output is correct
13 Correct 196 ms 37924 KB Output is correct
14 Correct 170 ms 37852 KB Output is correct
15 Correct 172 ms 38008 KB Output is correct
16 Correct 144 ms 37752 KB Output is correct
17 Correct 157 ms 37880 KB Output is correct
18 Correct 170 ms 37980 KB Output is correct
19 Correct 165 ms 37892 KB Output is correct
20 Correct 172 ms 38008 KB Output is correct
21 Correct 155 ms 37752 KB Output is correct
22 Correct 141 ms 37752 KB Output is correct
23 Correct 145 ms 37708 KB Output is correct
24 Correct 157 ms 37672 KB Output is correct
25 Correct 150 ms 37772 KB Output is correct
26 Correct 182 ms 37752 KB Output is correct
27 Correct 418 ms 47844 KB Output is correct
28 Correct 358 ms 49144 KB Output is correct
29 Correct 332 ms 48828 KB Output is correct
30 Correct 363 ms 49396 KB Output is correct
31 Correct 358 ms 49260 KB Output is correct
32 Correct 265 ms 47608 KB Output is correct
33 Correct 303 ms 47532 KB Output is correct
34 Correct 283 ms 47488 KB Output is correct
35 Correct 355 ms 47452 KB Output is correct
36 Correct 253 ms 47412 KB Output is correct
37 Correct 257 ms 47352 KB Output is correct
38 Correct 626 ms 74680 KB Output is correct
39 Correct 654 ms 81068 KB Output is correct
40 Correct 535 ms 66824 KB Output is correct
41 Correct 633 ms 78720 KB Output is correct
42 Correct 383 ms 47968 KB Output is correct
43 Correct 353 ms 48392 KB Output is correct
44 Correct 528 ms 58228 KB Output is correct
45 Correct 588 ms 58284 KB Output is correct
46 Correct 522 ms 58352 KB Output is correct
47 Correct 354 ms 48284 KB Output is correct
48 Correct 335 ms 48460 KB Output is correct
49 Correct 495 ms 58884 KB Output is correct
50 Correct 531 ms 58532 KB Output is correct
51 Correct 591 ms 58332 KB Output is correct
52 Correct 409 ms 56232 KB Output is correct
53 Correct 508 ms 65268 KB Output is correct
54 Correct 601 ms 73124 KB Output is correct
55 Correct 496 ms 64908 KB Output is correct