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i ve Q which ask me to write method called nodelevel(int k ) which returns how many nodes in level k.. and i write a code but i dont know what is wrong with it ??? [code]public nodelevel(int k){ if(root == null) return 0; else return getnodelevel(root, 1); } private … 
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i am new here and i have this Q to solve it plz help me Using class stack, write a program to read an expression and checks if the symbols : the parentheses ( ), square brackets [ ] are balanced or not. For example : (a+b-[c+d)] is not balanced …
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