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  1. #include <vector>
  2. #include <list>
  3. #include <iostream>
  4.  
  5. using namespace std;
  6.  
  7. vector<vector<int>> split(const vector<int>& v, size_t n)
  8. {
  9.     vector<vector<int>> r;
  10.     for(size_t i = 0, S = v.size(), m = (S+n-1)/n; i < m; ++i)
  11.         r.emplace_back(v.begin()+i*n,v.begin()+i*n+(i==m-1&&S%n?S%n:n));
  12.     return r;
  13. }
  14.  
  15. template<typename Iterator>
  16. vector<vector<typename Iterator::value_type>>
  17.     split(Iterator b, Iterator e, size_t n)
  18. {
  19.     vector<vector<typename Iterator::value_type>> r;
  20.     while(b != e)
  21.     {
  22.         Iterator start = b;
  23.         size_t m = n;
  24.         while(m-- && b != e) b = next(b);
  25.         r.emplace_back(start,b);
  26.     }
  27.     return r;
  28. }
  29.  
  30.  
  31. int main(int argc, char * argv[])
  32. {
  33.     for(auto a: split({1,2,3,4,5,6,7,8,9,10},3))
  34.     {
  35.         for(auto b: a) cout << b << "  ";
  36.         cout << "\n";
  37.     }
  38.     list<int> L = {1,2,3,4,5,6,7,8,9,10};
  39.     for(auto a: split(L.begin(),L.end(),3))
  40.     {
  41.         for(auto b: a) cout << b << "  ";
  42.         cout << "\n";
  43.     }
  44. }
  45.  
Success #stdin #stdout 0.01s 5436KB
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stdin
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Standard input is empty
stdout
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1  2  3  
4  5  6  
7  8  9  
10  
1  2  3  
4  5  6  
7  8  9  
10
https://ideone.com/KiooWa
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
secret

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