message: Update largest-subarray-length-k.cpp
diff: @@ -18,6 +18,6 @@ public:
  }
  l = 0;
  }
  - return vector<int>(cbegin(nums) + left, cbegin(nums) + left + k);
  + return {cbegin(nums) + left, cbegin(nums) + left + k};
  }
  };
  