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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. const long long MaxN = 1e6 +5, INF = 1e18;
  4. long long n, a[MaxN], dp[MaxN];
  5. int main()
  6. {
  7.     ios_base::sync_with_stdio(0);
  8.     cin.tie(0);
  9.     cin >> n;
  10.     for (long long i=1; i<=n; i++)
  11.     {
  12.         cin >> a[i];
  13.     }
  14.     for (long long i=1; i<=n; i++)
  15.     {
  16.         dp[i]=INF;
  17.     }
  18.     for (long long i=1; i<=n; i++)
  19.     {
  20.         long long pos= lower_bound(dp+1,dp+n+1,a[i])-dp;
  21.         dp[pos]=a[i];
  22.     }
  23.     for (long long i=n; i>=1; i--)
  24.     {
  25.         if(dp[i]<INF)
  26.         {
  27.             cout << i;
  28.             return 0;
  29.         }
  30.     }
  31. }
  32.  
Success #stdin #stdout 0s 5316KB
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https://ideone.com/Q2mWZm
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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