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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <vector>
  4. #include <algorithm>
  5. #include <numeric>
  6. using namespace std;
  7. template<typename T>
  8. std::vector< std::vector<T> > split(std::vector<T> vec, uint64_t n) {
  9. std::vector< std::vector<T> > vec_of_vecs(n);
  10.  
  11. uint64_t quotient = vec.size() / n;
  12. uint64_t reminder = vec.size() % n;
  13. uint64_t first = 0;
  14. uint64_t last;
  15. for (uint64_t i = 0; i < n; ++i) {
  16. if (i < reminder) {
  17. last = first + quotient + 1;
  18. vec_of_vecs[i] = std::vector<T>(vec.begin() + first, vec.begin() + last);
  19. first = last;
  20. }
  21. else if (i != n - 1) {
  22. last = first +  quotient;
  23. vec_of_vecs[i] = std::vector<T>(vec.begin() + first, vec.begin() + last);
  24. first = last;
  25. }
  26. else
  27. vec_of_vecs[i] = std::vector<T>(vec.begin() + first, vec.end());
  28. }
  29.  
  30. return vec_of_vecs;
  31. }
  32.  
  33. #define Nsta 30
  34. #define NGroups 5
  35.  
  36. int main(void)
  37. {
  38. std::vector<uint64_t> vector(Nsta);
  39. std::iota(std::begin(vector), std::end(vector), 1);
  40.  
  41. std::vector<std::vector<uint64_t>> vecs(NGroups);
  42. vecs = split(vector, NGroups);
  43.  
  44. for (uint64_t m = 0; m < vecs.size(); ++m)
  45. {
  46. for (auto i : vecs[m])
  47. {
  48.     std::cout << std::setw(3) << i << " ";
  49. }
  50. std::cout << std::endl;
  51. }
  52.  return 0;
  53. }
  54.    
  55. template<typename T>
  56. std::vector< std::vector<T> > split(std::vector<T> vec, size_t n) {
  57.   std::vector< std::vector<T> > vec_of_vecs(n);
  58.  
  59.   size_t quotient = vec.size() / n;
  60.   size_t reminder = vec.size() % n;
  61.   size_t first = 0;
  62.   size_t last = quotient;
  63.   for (size_t i = 0; i < n; ++i, first += quotient, last += quotient) {
  64.     vec_of_vecs.push_back(std::vector<T>(&vec[first], &vec[last]));
  65.   }
  66.   if (reminder > 0) {
  67.     vec_of_vecs.push_back(std::vector<T>(vec.begin() + first, vec.end()));
  68.   }
  69. }
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