[C++] Fastest (0 ms) One Line Solution
\nclass Solution\n{\n    public:\n    bool isRectangleOverlap(vector<int>& rec1, vector<int>& rec2)\n    {\n        return rec2[0] < rec1[2] && rec2[2] > rec1[0
```\nclass Solution\n{\n    public:\n    bool isRectangleOverlap(vector<int>& rec1, vector<int>& rec2)\n    {\n        return rec2[0] < rec1[2] && rec2[2] > rec1[0] && rec2[1] < rec1[3] && rec2[3] > rec1[1];\n    }\n};\n```
['C']