Submission #380678

#	Time	Username	Problem	Language	Result	Execution time	Memory
380678		madlogic	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include "molecules.h"

std::vector<int> find_subset(int l, int u, std::vector<int> w) {
  vector<int> res;
  int n = (int) w.size();
  for (int i = 0; i < n; i++) {
    if (w[i] >= l && w[i] <= u) {
      return {i};
    }
  }
  vector<pair<int, int>> nums;
  for (int i = 0; i < n; i++) {
    if (w[i] <= u) {
      nums.emplace_back(w[i], i);
    }
  }
  sort(nums.rbegin(), nums.rend());
  int cur = 0;
  vector<int> res;
  for (auto& [x, y] : nums) {
    if (cur + x > u) {
      continue;
    }
    cur += x;
    res.push_back(y);
  }
  return res;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:4:3: error: 'vector' was not declared in this scope
    4 |   vector<int> res;
      |   ^~~~~~
molecules.cpp:4:3: note: suggested alternatives:
In file included from /usr/include/c++/9/vector:67,
                 from molecules.h:3,
                 from molecules.cpp:1:
/usr/include/c++/9/bits/stl_vector.h:386:11: note:   'std::vector'
  386 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
In file included from molecules.h:3,
                 from molecules.cpp:1:
/usr/include/c++/9/vector:90:13: note:   'std::pmr::vector'
   90 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
molecules.cpp:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> res;
      |          ^~~
molecules.cpp:11:10: error: 'pair' was not declared in this scope; did you mean 'std::pair'?
   11 |   vector<pair<int, int>> nums;
      |          ^~~~
      |          std::pair
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from molecules.h:3,
                 from molecules.cpp:1:
/usr/include/c++/9/bits/stl_pair.h:208:12: note: 'std::pair' declared here
  208 |     struct pair
      |            ^~~~
molecules.cpp:11:15: error: expected primary-expression before 'int'
   11 |   vector<pair<int, int>> nums;
      |               ^~~
molecules.cpp:14:7: error: 'nums' was not declared in this scope
   14 |       nums.emplace_back(w[i], i);
      |       ^~~~
molecules.cpp:17:8: error: 'nums' was not declared in this scope
   17 |   sort(nums.rbegin(), nums.rend());
      |        ^~~~
molecules.cpp:17:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   17 |   sort(nums.rbegin(), nums.rend());
      |   ^~~~
      |   short
molecules.cpp:19:10: error: expected primary-expression before 'int'
   19 |   vector<int> res;
      |          ^~~
molecules.cpp:25:5: error: 'res' was not declared in this scope
   25 |     res.push_back(y);
      |     ^~~
molecules.cpp:27:10: error: 'res' was not declared in this scope
   27 |   return res;
      |          ^~~