Depth First Search

[jayakrishna78]

No description provided.

[ssrikanthreddy]

 Depth first search
1. Python
- Running: ❌ No std in, no null safety
- Compiling: ✅
- STDIO across all: ❌
- Comments:✅
- Style: ❌ No main function

2. C++
- Running: ❌ No std in, no null safety
- Compiling: ❌not compiling on cPP17
- STDIO across all:❌ No std in
- Comments:❌ No comments
- Style: ✅ 

3. Java
- Running: ❌ No std in, no null safety
- Compiling:✅
- STDIO across all: ❌ No stdin
- Comments:⚠️ More comments please
- Style: ✅

[vellsneha]

Please add test cases