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  1. #include <iostream>
  2. #include <numeric>
  3. #include <set>
  4.  
  5. int main()
  6. {
  7.     int t[4] = { 3, 3, 1, 5 };
  8.     std::set<int> mySet;
  9.     int mySum = std::accumulate(std::begin(t), std::end(t), 0, 
  10.          [&](int n, int n2){return n += mySet.insert(n2).second?n2:0;});
  11.     std::cout << "The sum is: " << mySum << std::endl;
  12.     return 0;
  13. }
Success #stdin #stdout 0s 3468KB
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stdin
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Standard input is empty
stdout
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The sum is: 9
https://ideone.com/rXhb8P
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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