Stack and Fibo added

Author: soumyadip007

DP/Fibo.ipynb

@@ -0,0 +1,57 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def fib(n, lookup): \n",
+    "  \n",
+    "    # Base case \n",
+    "    if n == 0 or n == 1 : \n",
+    "        lookup[n] = n \n",
+    "  \n",
+    "    # If the value is not calculated previously then calculate it \n",
+    "    if lookup[n] is None: \n",
+    "        lookup[n] = fib(n-1 , lookup)  + fib(n-2 , lookup)  \n",
+    "  \n",
+    "    # return the value corresponding to that value of n \n",
+    "    return lookup[n] \n",
+    "# end of function \n",
+    "  \n",
+    "# Driver program to test the above function \n",
+    "def main(): \n",
+    "    n = 34 \n",
+    "    # Declaration of lookup table \n",
+    "    # Handles till n = 100  \n",
+    "    lookup = [None]*(101) \n",
+    "    print \"Fibonacci Number is \", fib(n, lookup) \n",
+    "  \n",
+    "if __name__==\"__main__\": \n",
+    "    main() "
+   ]
+  }
+ ],
+ "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": "3.7.4"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}

MISC/Stack.ipynb

@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [
     {