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  1. #include <iostream>
  2. #include <vector>
  3. #include <numeric>
  4.  
  5.  
  6. int a2( const std::vector<int> &v )
  7. {
  8.     return std::accumulate( v.begin(), v.end(), 0, []( int a, int b ) {
  9.         return a + ( b % 2 ? b : -b );
  10.     } );
  11. }
  12.  
  13. int main()
  14. {
  15.     std::cout << a2( { 1 } ) << std::endl;
  16.     std::cout << a2( { 1, 2 } ) << std::endl;
  17.     std::cout << a2( { 1, 2, 3 } ) << std::endl;
  18.     std::cout << a2( { 1, 2, 3, 4 } ) << std::endl;
  19. }
  20.  
Success #stdin #stdout 0s 16064KB
comments (?)
stdin 
Standard input is empty
stdout 
1
-1
2
-2
https://ideone.com/c7uOMs
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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