Added java program for Stack problem Design a Stack with Increment Operation

Author: Shamoyeeta

Java/Design-a-Stack-With-Increment-Operation.java

@@ -0,0 +1,35 @@
+class CustomStack {
+ int[] stack;
+ public int top=-1;
+ public CustomStack(int maxSize) {
+ stack=new int[maxSize];
+ }
+ 
+ public void push(int x) {
+ if(top<stack.length-1)
+ {
+ stack[++top]=x;
+ }
+ }
+ 
+ public int pop() {
+ if(top==-1)
+ return -1;
+ top--;
+ return stack[top+1];
+ }
+ 
+ public void increment(int k, int val) {
+ for(int i=0;i<(k>top+1?top+1:k);i++) {
+ stack[i]+=val;
+ }
+ }
+}
+
+/**
+ * Your CustomStack object will be instantiated and called as such:
+ * CustomStack obj = new CustomStack(maxSize);
+ * obj.push(x);
+ * int param_2 = obj.pop();
+ * obj.increment(k,val);
+ */