trying fork

DAA Lab-2 .ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Binary Search using Single array"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Iterative Binary Search using array"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Given element is present at position 3\n"
+     ]
+    }
+   ],
+   "source": [
+    "def binary_search(arr, x): \n",
+    "    low = 0\n",
+    "    high = len(arr) - 1\n",
+    "    mid = 0\n",
+    "\n",
+    "    while low <= high: \n",
+    "\n",
+    "        mid = (high + low) // 2\n",
+    "\n",
+    "       \n",
+    "        if arr[mid] < x: \n",
+    "            low = mid + 1\n",
+    "\n",
+    " \n",
+    "        elif arr[mid] > x: \n",
+    "            high = mid - 1\n",
+    "\n",
+    "        else: \n",
+    "            return mid \n",
+    "\n",
+    "    return -1\n",
+    " \n",
+    "arr = [ 5,6,7,8,9 ] \n",
+    "x = 7\n",
+    "#Calling the binary search function\n",
+    "result = binary_search(arr, x) \n",
+    "\n",
+    "if result != -1: \n",
+    "    print(\"Given element is present at position\", str(result+1)) \n",
+    "else: \n",
+    "\tprint(\"Given element is not present in array\") \n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Binary Search using Singly Linked List"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "7\n"
+     ]
+    }
+   ],
+   "source": [
+    "class Node: \n",
+    "    def __init__(self, data): \n",
+    "        self.data = data \n",
+    "        self.next = None\n",
+    "        self.prev = None\n",
+    "        \n",
+    "def newNode(x):\n",
+    "    temp = Node(0) \n",
+    "    temp.data = x \n",
+    "    temp.next = None\n",
+    "    return temp \n",
+    "\n",
+    "def middle(start, last): \n",
+    "    if (start == None): \n",
+    "        return None\n",
+    "    \n",
+    "    slow = start \n",
+    "    fast = start . next\n",
+    "\n",
+    "    while (fast != last): \n",
+    "    \n",
+    "        fast = fast . next\n",
+    "        if (fast != last): \n",
+    "        \n",
+    "            slow = slow . next\n",
+    "            fast = fast . next\n",
+    "        \n",
+    "    return slow \n",
+    "\n",
+    "# Function for implementing the Binary \n",
+    "# Search on linked list \n",
+    "def binarySearch(head,value): \n",
+    "\n",
+    "    start = head \n",
+    "    last = None\n",
+    "\n",
+    "    while True : \n",
+    "    \n",
+    "        # Find middle \n",
+    "        mid = middle(start, last) \n",
+    "\n",
+    "        # If middle is empty \n",
+    "        if (mid == None): \n",
+    "            return None\n",
+    "\n",
+    "        # If value is present at middle \n",
+    "        if (mid . data == value): \n",
+    "            return mid.data \n",
+    "\n",
+    "        # If value is more than mid \n",
+    "        elif (mid . data < value): \n",
+    "            start = mid . next\n",
+    "\n",
+    "        # If the value is less than mid. \n",
+    "        else: \n",
+    "            last = mid \n",
+    "\n",
+    "        if not (last == None or last != start): \n",
+    "            break\n",
+    "\n",
+    "    # value not present \n",
+    "    return None\n",
+    "\n",
+    "# Driver Code \n",
+    "\n",
+    "head = newNode(1) \n",
+    "head.next = newNode(4) \n",
+    "head.next.next = newNode(7) \n",
+    "head.next.next.next = newNode(8) \n",
+    "head.next.next.next.next = newNode(9) \n",
+    "head.next.next.next.next.next = newNode(10) \n",
+    "value = 7\n",
+    "print(binarySearch(head, value) ) \n",
+    " "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}

Lab programs/Lab 1

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+