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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. #define f(i,n) for(ll i=0;i<n;i++)
  5.  
  6.  
  7. bool compare(pair<ll,ll>p,pair<ll,ll>q)
  8. {
  9.     if(p.first!=q.first)return p.first<q.first;
  10.     else return p.second<q.second;
  11. }
  12. ll n;
  13. ll bs(ll dp[],ll k,ll mn)
  14. {
  15.     ll l=0,h=k-1;
  16.     if(mn<dp[0])return -1;
  17.     if(mn==dp[0])return 0;
  18.     if(mn>=dp[k-1])return k-1;
  19.     while(l<h)
  20.     {ll mid=(l+h)/2;
  21.     if(dp[mid]==mn)return mid;
  22.         if(dp[mid]>mn)h=mid-1;
  23.          if(dp[mid]<mn)l=mid;
  24.         if(dp[l]<mn&&dp[l+1]>mn)return l;
  25.          if(dp[h]<mn&&dp[h+1]>mn)return h;
  26.  
  27.     }
  28. }
  29.  
  30. int main() {
  31.  
  32. //freopen("input.txt","r",stdin);
  33. ll t;cin>>t;
  34. while(t--)
  35. {scanf("%lld",&n);
  36. pair<ll,ll>p[n];
  37. f(i,n)scanf("%lld",&p[i].first);
  38. f(i,n)scanf("%lld",&p[i].second);
  39. sort(p,p+n,compare);
  40. ll dp[n];
  41. dp[0]=p[0].second;ll k=0;
  42. ll b[n];f(i,n)b[i]=p[i].second;
  43. //f(i,n)cout<<b[i]<<" ";cout<<endl;
  44. for(ll i=1;i<n;i++)
  45. {
  46.    ll in=bs(dp,k+1,b[i]);
  47.  
  48. dp[in+1]=b[i];if(in==k)k++;
  49.  
  50.  
  51. }printf("%lld\n",k+1);
  52. //for(ll i=n-1;i>=0;i--)if(dp[i]!=1e12){cout<<i+1<<endl;break;}
  53.  
  54. }
  55.  
  56. 	return 0;
  57. }
  58.  
Runtime error #stdin #stdout 0.02s 4360KB
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https://ideone.com/dN56xe
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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