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  1. /*
  2. Task: Problem 6.07
  3. Date: Dec 24, 2020
  4. Author: aLittleLove (Minh Vu)
  5. */
  6.  
  7. #include<bits/stdc++.h>
  8.  
  9. using namespace std;
  10.  
  11. int main()
  12. {
  13.     ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
  14.     //freopen("input.txt","r",stdin);
  15.     int n; cin >> n;
  16.     set<int> s;
  17.     for (int i=1; i<=n; i++)
  18.     {
  19.         int x; cin >> x;
  20.         s.insert(x);
  21.     }
  22.     if (s.size()<2) cout << 0; // it hon 2 phan tu -> ko co phan thu lon thu 2
  23.     else 
  24.     {
  25.         set<int>::reverse_iterator it = s.rbegin(); //phan tu o cuoi s (phan tu lon nhat)
  26.         it++; //di nguoc lai den phan tu lon thu 2
  27.         cout << *it;
  28.     }
  29.     return 0;
  30. }
Success #stdin #stdout 0s 5012KB
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stdin
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stdout
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https://ideone.com/GuyDQ5
UIT 6.07
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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