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| 1 | +{ |
| 2 | + "cells": [ |
| 3 | + { |
| 4 | + "cell_type": "code", |
| 5 | + "execution_count": 1, |
| 6 | + "id": "f17262c8", |
| 7 | + "metadata": {}, |
| 8 | + "outputs": [ |
| 9 | + { |
| 10 | + "name": "stdout", |
| 11 | + "output_type": "stream", |
| 12 | + "text": [ |
| 13 | + "2\n" |
| 14 | + ] |
| 15 | + } |
| 16 | + ], |
| 17 | + "source": [ |
| 18 | + "#First index of element\n", |
| 19 | + "def first_index(arr,x):\n", |
| 20 | + " res = -1\n", |
| 21 | + " for i in range(len(arr)):\n", |
| 22 | + " if arr[i]==x:\n", |
| 23 | + " res=i\n", |
| 24 | + " break\n", |
| 25 | + " return res\n", |
| 26 | + "print(first_index([7,5,2,11,2,43,1,1],2))" |
| 27 | + ] |
| 28 | + }, |
| 29 | + { |
| 30 | + "cell_type": "code", |
| 31 | + "execution_count": 2, |
| 32 | + "id": "ba4b3c39", |
| 33 | + "metadata": {}, |
| 34 | + "outputs": [ |
| 35 | + { |
| 36 | + "name": "stdout", |
| 37 | + "output_type": "stream", |
| 38 | + "text": [ |
| 39 | + "4\n" |
| 40 | + ] |
| 41 | + } |
| 42 | + ], |
| 43 | + "source": [ |
| 44 | + "#Last index of element\n", |
| 45 | + "def last_index(arr,x):\n", |
| 46 | + " res = -1\n", |
| 47 | + " for i in range(len(arr)-1,-1,-1):\n", |
| 48 | + " if arr[i]==x:\n", |
| 49 | + " res=i\n", |
| 50 | + " break\n", |
| 51 | + " return res\n", |
| 52 | + "print(last_index([7,5,2,11,2,43,1,1],2))" |
| 53 | + ] |
| 54 | + }, |
| 55 | + { |
| 56 | + "cell_type": "code", |
| 57 | + "execution_count": 3, |
| 58 | + "id": "08958bb9", |
| 59 | + "metadata": {}, |
| 60 | + "outputs": [ |
| 61 | + { |
| 62 | + "name": "stdout", |
| 63 | + "output_type": "stream", |
| 64 | + "text": [ |
| 65 | + "[7, 5, 2, 11, 2, 43, 1, 10]\n" |
| 66 | + ] |
| 67 | + } |
| 68 | + ], |
| 69 | + "source": [ |
| 70 | + "#Reverse the array\n", |
| 71 | + "def array_reverse(arr):\n", |
| 72 | + " return arr[::-1]\n", |
| 73 | + "\n", |
| 74 | + "print(array_reverse([10, 1, 43, 2 ,11, 2, 5 ,7]))" |
| 75 | + ] |
| 76 | + }, |
| 77 | + { |
| 78 | + "cell_type": "code", |
| 79 | + "execution_count": 4, |
| 80 | + "id": "622a1696", |
| 81 | + "metadata": {}, |
| 82 | + "outputs": [ |
| 83 | + { |
| 84 | + "name": "stdout", |
| 85 | + "output_type": "stream", |
| 86 | + "text": [ |
| 87 | + "[2, 11, 2, 43, 1, 1, 7, 5]\n" |
| 88 | + ] |
| 89 | + } |
| 90 | + ], |
| 91 | + "source": [ |
| 92 | + "#Rotate array\n", |
| 93 | + "def rotate_array(arr,k):\n", |
| 94 | + " res = arr[k:]+arr[:k]\n", |
| 95 | + " return res\n", |
| 96 | + "\n", |
| 97 | + "print(rotate_array([7, 5, 2 ,11 ,2 ,43, 1, 1],2))" |
| 98 | + ] |
| 99 | + }, |
| 100 | + { |
| 101 | + "cell_type": "code", |
| 102 | + "execution_count": 5, |
| 103 | + "id": "2c548fd9", |
| 104 | + "metadata": {}, |
| 105 | + "outputs": [ |
| 106 | + { |
| 107 | + "name": "stdout", |
| 108 | + "output_type": "stream", |
| 109 | + "text": [ |
| 110 | + "(5, 12)\n" |
| 111 | + ] |
| 112 | + } |
| 113 | + ], |
| 114 | + "source": [ |
| 115 | + "#K'th smallest/largest element in an array\n", |
| 116 | + "def kelement(arr,k):\n", |
| 117 | + " arr.sort()\n", |
| 118 | + " if len(arr)>=k:\n", |
| 119 | + " r1 = arr[k-1] #smallest\n", |
| 120 | + " r2 = arr[-k] #largest\n", |
| 121 | + " return r1,r2\n", |
| 122 | + "\n", |
| 123 | + "print(kelement([12, 3, 5, 7, 19],2))" |
| 124 | + ] |
| 125 | + } |
| 126 | + ], |
| 127 | + "metadata": { |
| 128 | + "kernelspec": { |
| 129 | + "display_name": "Python 3.9.7 64-bit", |
| 130 | + "language": "python", |
| 131 | + "name": "python3" |
| 132 | + }, |
| 133 | + "language_info": { |
| 134 | + "codemirror_mode": { |
| 135 | + "name": "ipython", |
| 136 | + "version": 3 |
| 137 | + }, |
| 138 | + "file_extension": ".py", |
| 139 | + "mimetype": "text/x-python", |
| 140 | + "name": "python", |
| 141 | + "nbconvert_exporter": "python", |
| 142 | + "pygments_lexer": "ipython3", |
| 143 | + "version": "3.9.7" |
| 144 | + }, |
| 145 | + "vscode": { |
| 146 | + "interpreter": { |
| 147 | + "hash": "0d591c6e422414675974e227c13f5382000c440fedd3c5006ef2be5d887f0ba7" |
| 148 | + } |
| 149 | + } |
| 150 | + }, |
| 151 | + "nbformat": 4, |
| 152 | + "nbformat_minor": 5 |
| 153 | +} |
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