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  1. #include <iostream>
  2. using namespace std;
  3. #include<algorithm>
  4. #include<vector>
  5. #include<set>
  6. #include<map>
  7. #define Fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  8. #define ll long long
  9.  
  10.  
  11.  
  12.  
  13.  
  14. void solve(const vector<int>& nums, int size, int t,
  15.     int idx, int sum, vector<int> holder,
  16.     set<vector<int>>& ans) {
  17.     if (sum == t) {
  18.         ans.insert(holder);
  19.         return;
  20.     }
  21.     if (idx == size) {
  22.         return;
  23.     }
  24.     solve(nums, size, t, idx + 1, sum, holder, ans);
  25.     holder.push_back(nums[idx]);
  26.     solve(nums, size, t, idx + 1, sum + nums[idx], holder, ans);
  27. }
  28.  
  29. void sumitup() {
  30.     multimap<int, set<vector<int>>> mp;
  31.     while (true) {
  32.         int t, size; cin >> t >> size;
  33.         if (size == 0) {
  34.             break;
  35.         }
  36.         vector<int> nums(size);
  37.         for (int i = 0; i < size; i++) {
  38.             cin >> nums[i];
  39.         }
  40.         set<vector<int>> ans;
  41.  
  42.         vector<int> current;
  43.         solve(nums, size, t, 0, 0, current, ans);
  44.         mp.insert({ t, ans });
  45.     }
  46.  
  47.     for (const auto& kv : mp) {
  48.         const int T = kv.first;
  49.         const auto& sums = kv.second;
  50.  
  51.         cout << "Sums of " << T << ":\n";
  52.  
  53.         if (sums.empty()) {
  54.             cout << "NONE\n";
  55.             continue;
  56.         }
  57.  
  58.         for (auto it = sums.rbegin(); it != sums.rend(); ++it) {
  59.             const auto& v = *it;
  60.             for (size_t i = 0; i < v.size(); ++i) {
  61.                 if (i) cout << "+";
  62.                 cout << v[i];
  63.             }
  64.             cout << "\n";
  65.         }
  66.     }
  67. }
  68. int main() {
  69.     Fast;
  70.     int t = 1;
  71.  
  72.     while (t--) {
  73.         sumitup();
  74.     }
  75.     return 0;
  76. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/SFYxrC
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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