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  1. #include<bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int n;
  6. int dp[1005];
  7. int v[1005];
  8.  
  9. int f(int id){
  10.     if(id == 0) return 1;
  11.     int &ret = dp[id];
  12.     if(ret != -1) return ret;
  13.     ret = 1;
  14.     for(int i = 0; i < id; i++){
  15.         int x = f(i);
  16.         if(v[i] <= v[id]) ret = max(ret, x+1);
  17.     }
  18.     return ret;
  19. }
  20.  
  21. int main()
  22. {
  23.     cin>>n;
  24.     for(int i = 0; i < n; i++) cin>>v[i];
  25.     fill(begin(dp), end(dp),-1);
  26.     dp[0] = 1;
  27.     f(n-1);
  28.     int ans = 1;
  29.     for(int i = 0; i < n; i++) ans = max(ans, dp[i]);
  30.     cout << ans << endl;
  31.     return 0;
  32. }
  33.  
Success #stdin #stdout 0s 4492KB
comments (?)
stdin 
5
1 3 2 4 1
stdout 
3
https://ideone.com/MmPDcg
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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