adding getMin,getMax,inoder,postorder and managing dir of stack and queue
adding getMin,getMax,inoder,postorder and managing dir of stack and queue

pranavj1001/LearnLanguages,pranavj1001/LearnLanguages,pranavj1001/LearnLanguages,pranavj1001/LearnLanguages,pranavj1001/LearnLanguages,pranavj1001/LearnLanguages,pranavj1001/LearnLanguages