oj.uz

Submission #21012

# Submission time Handle Problem Language Result Execution time Memory
21012 2017-03-29T09:39:21 Z model_code Long Mansion (JOI17_long_mansion) C++11
100 / 100
 569 ms 73544 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:91:52: 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:94:25: 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:98:30: 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:111:32: 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 3 ms 39752 KB Output is correct
2 Correct 13 ms 39884 KB Output is correct
3 Correct 13 ms 40016 KB Output is correct
4 Correct 13 ms 39752 KB Output is correct
5 Correct 16 ms 39752 KB Output is correct
6 Correct 9 ms 39752 KB Output is correct
7 Correct 6 ms 39752 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 39752 KB Output is correct
2 Correct 13 ms 39884 KB Output is correct
3 Correct 13 ms 40016 KB Output is correct
4 Correct 13 ms 39752 KB Output is correct
5 Correct 16 ms 39752 KB Output is correct
6 Correct 9 ms 39752 KB Output is correct
7 Correct 6 ms 39752 KB Output is correct
8 Correct 159 ms 39752 KB Output is correct
9 Correct 139 ms 39752 KB Output is correct
10 Correct 146 ms 39884 KB Output is correct
11 Correct 153 ms 40016 KB Output is correct
12 Correct 129 ms 39752 KB Output is correct
13 Correct 136 ms 39752 KB Output is correct
14 Correct 149 ms 39752 KB Output is correct
15 Correct 126 ms 39752 KB Output is correct
16 Correct 126 ms 39752 KB Output is correct
17 Correct 149 ms 39752 KB Output is correct
18 Correct 146 ms 39752 KB Output is correct
19 Correct 129 ms 39752 KB Output is correct
20 Correct 136 ms 39752 KB Output is correct
21 Correct 109 ms 39752 KB Output is correct
22 Correct 133 ms 39752 KB Output is correct
23 Correct 136 ms 39752 KB Output is correct
24 Correct 133 ms 39752 KB Output is correct
25 Correct 139 ms 39752 KB Output is correct
26 Correct 133 ms 39752 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 296 ms 48708 KB Output is correct
2 Correct 299 ms 48000 KB Output is correct
3 Correct 303 ms 48600 KB Output is correct
4 Correct 303 ms 48404 KB Output is correct
5 Correct 293 ms 48312 KB Output is correct
6 Correct 256 ms 47232 KB Output is correct
7 Correct 246 ms 47192 KB Output is correct
8 Correct 226 ms 47208 KB Output is correct
9 Correct 223 ms 47232 KB Output is correct
10 Correct 243 ms 47104 KB Output is correct
11 Correct 233 ms 47144 KB Output is correct

Subtask #4
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 39752 KB Output is correct
2 Correct 13 ms 39884 KB Output is correct
3 Correct 13 ms 40016 KB Output is correct
4 Correct 13 ms 39752 KB Output is correct
5 Correct 16 ms 39752 KB Output is correct
6 Correct 9 ms 39752 KB Output is correct
7 Correct 6 ms 39752 KB Output is correct
8 Correct 159 ms 39752 KB Output is correct
9 Correct 139 ms 39752 KB Output is correct
10 Correct 146 ms 39884 KB Output is correct
11 Correct 153 ms 40016 KB Output is correct
12 Correct 129 ms 39752 KB Output is correct
13 Correct 136 ms 39752 KB Output is correct
14 Correct 149 ms 39752 KB Output is correct
15 Correct 126 ms 39752 KB Output is correct
16 Correct 126 ms 39752 KB Output is correct
17 Correct 149 ms 39752 KB Output is correct
18 Correct 146 ms 39752 KB Output is correct
19 Correct 129 ms 39752 KB Output is correct
20 Correct 136 ms 39752 KB Output is correct
21 Correct 109 ms 39752 KB Output is correct
22 Correct 133 ms 39752 KB Output is correct
23 Correct 136 ms 39752 KB Output is correct
24 Correct 133 ms 39752 KB Output is correct
25 Correct 139 ms 39752 KB Output is correct
26 Correct 133 ms 39752 KB Output is correct
27 Correct 296 ms 48708 KB Output is correct
28 Correct 299 ms 48000 KB Output is correct
29 Correct 303 ms 48600 KB Output is correct
30 Correct 303 ms 48404 KB Output is correct
31 Correct 293 ms 48312 KB Output is correct
32 Correct 256 ms 47232 KB Output is correct
33 Correct 246 ms 47192 KB Output is correct
34 Correct 226 ms 47208 KB Output is correct
35 Correct 223 ms 47232 KB Output is correct
36 Correct 243 ms 47104 KB Output is correct
37 Correct 233 ms 47144 KB Output is correct
38 Correct 546 ms 67472 KB Output is correct
39 Correct 536 ms 73544 KB Output is correct
40 Correct 429 ms 61268 KB Output is correct
41 Correct 569 ms 72880 KB Output is correct
42 Correct 299 ms 46352 KB Output is correct
43 Correct 263 ms 46748 KB Output is correct
44 Correct 386 ms 53348 KB Output is correct
45 Correct 429 ms 53348 KB Output is correct
46 Correct 449 ms 53216 KB Output is correct
47 Correct 266 ms 46616 KB Output is correct
48 Correct 256 ms 47012 KB Output is correct
49 Correct 426 ms 54140 KB Output is correct
50 Correct 453 ms 53612 KB Output is correct
51 Correct 469 ms 53084 KB Output is correct
52 Correct 313 ms 52432 KB Output is correct
53 Correct 373 ms 59152 KB Output is correct
54 Correct 459 ms 64964 KB Output is correct
55 Correct 386 ms 58556 KB Output is correct