Find the maximum product of three numbers in an array?
Eg. 9,5,1,2,3
Max product= 9*5*3= 135
The array can hav negative numbers also..
Answer Posted / utkarsh
/*The maximum value of the product fr a set of 3 numbers positiv or negative can be
->either the product of 2 negative numbers( the ones with highest absolut values) and 1(biggest) positive number
->or product of three biggest positive numbers
->zero if all other numbers (except that 0) ar negativ
-> product of smallest 3 negativ number if all numbers are negative
>>>
<you can try it for ANY POSSIBLE VALUES..in th array and see..>
<<<<
*/
procedure
I)
so first IF ARRAY HAS LESS THAN 3 ELEMENTS THROW ERROR
else
sort the numbers in 2 arrays..
neg[]-> with negativ values in descending order
pos[]-> with positive values in descending order
->if there is a zero set a boolean value of a variabl ISZERO as TRUE
II) IF (neg[] has zero or only 1 element) THEN
/* product of the three highest values in pos[] (ie the first three values) is the answer*/
RETURN (pos[0]*pos[1]*pos[2]);
III) ELSE IF pos[] is empty
/*(meaning there are only negative values..multiply the smallest three negative numbers (ie say -1,-2,-3,-4,-5 means multiply -1,-2,-3 you get -6)..that is the answer */
if pos[] is NULL AND if there is a zero then
RETURN ZERO;
else //if pos[] is null and no element is zero then
RETURN neg[neg.length-1]*neg[neg.length-2]*neg[neg.length-3]
/*
//NOTE:
there are only negative values and zeros
highest value is 0
check that too from ISZERO variabl..
*/
IV)ONLY if neg[] array has more than 1 value THEN
multiply th biggest 2 negativ absolute numbers
/*
//(eg {-9,-7,-6,-5 } means...tak -9 and -7..so product is 63)
V) multiply th above result with th highest postiv value from positive array...(ie pos[])
VI) compare this value got in STEP FIVE with product of the three highest values in pos[](ie product of first three values) which ever is greate is the answer
ie
*/
IF (neg[0]*neg[1]*pos[0])>(pos[0]*pos[1]*pos[2]) THEN
RETURN (neg[0]*neg[1]*pos[0])
ELSE RETURN (pos[0]*pos[1]*pos[2])
IT IS VERY EASY TO CODE THIS BECAUSE THE STEPS ARE ALMOST IN PSUEDOCODE....hope it helps...
Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
Code for Small C++ Class to Transform Any Static Control into a Hyperlink Control?
How to swap two ASCII numbers?
Performance Algorithm A performs 10n2 basic operations and algorithm B performs 300 lg n basic operations. For what value of n does algorithm B start to show its better performance?
Teta-Omeg-Big-Oh Show that f(n) = n2 + 3n3 is ;(n3).
What output does the following code generate? Why? What output does it generate if you make A::Foo() a pure virtual function? class A { A() { this->Foo(); } virtual void Foo() { cout << "A::Foo()" << endl; } }; class B : public A { B() { this->Foo(); } virtual void Foo() { cout << "A::Foo()" << endl; } }; int main(int, char**) { A objectA; B objectB; return 0; }
write a program using 2 D that searches a number and display the number of items 12 inputs values input 15,20, 13, 30, 38, 40,16, 18, 20 ,18 ,20 enter no. to search : 20
Definition of priority queue was given. We have to implement the priority queue using array of pointers with the priorities given in the range 1..n. The array could be accessed using the variable top. The list corresponding to the array elements contains the items having the priority as the array index. Adding an item would require changing the value of top if it has higher priority than top. Extracting an item would require deleting the first element from the corresponding queue. The following class was given: class PriorityQueue { int *Data[100]; int top; public: void put(int item, int priority); // inserts the item with the given priority. int get(int priority); // extract the element with the given priority. int count(); // returns the total elements in the priority queue. int isEmpty(); // check whether the priority queue is empty or not. }; We had to implement all these class functions.
how to take time as input in the format (12:02:13) from user so that controls remains between these columns?
i really need help about this.. write a program to display the set of odd and even numbers separately. find the highest and lowest value of the given numbers.
Given a table of the form: Product Sold on A 1/1/1980 B 1/1/1980 C 1/1/1980 A 1/1/1980 B 1/1/1980 C 2/1/1980 A 2/1/1980 There are 30 products and 10,000 records of such type. Also the month period during which sales happened is given to u. Write the program to display the result as: Product Month No. of copies A January 12 A February 15 A March 27 B January 54 B February 15 B March 10 C January 37
How can I Draw an ellipse in 3d space and color it by using graph3d?
1+1/2!+1/3!+...+1/n!
Implement a command console for changing settings on a particular object. The command console should allow you to enter a string and will return the response (very similar to a terminal session). The commands are as follows: SET propertyname=newvalue will change the target object’s member named “propertyname” to have a value equal to “newvalue”. If the input value is incompatible (i.e. an int being set to a string), print out an appropriate error message. GET propertyname will print out the current value of the target object’s member named “propertyname”. GET * will print out a list of all target object members and their current values. The system should be extensible for future commands and should accept an arbitrary object, such that another developer could insert another object into the system and rely on the command console to get and set the properties correctly.
Write a C/C++ program that connects to a MySQL server and displays the global TIMEZONE.
solve the problem in the programming language C++"if a five digit number is input through the keyboard.Write a program to calculate the sum of its digits(hint: use the modulus operator)