message: Update find-anagram-mappings.cpp
diff: @@ -9,9 +9,9 @@ public:
  lookup[B[i]].emplace(i);
  }
  vector<int> result;
  - for (const auto& el : A) {
  - result.emplace_back(lookup[el].back());
  - lookup[el].pop();
  + for (const auto& n : A) {
  + result.emplace_back(lookup[n].back());
  + lookup[n].pop();
  }
  return result;
  }
  