## Find longest cycle in directed graph

Find longest cycle in directed graph. A cycle is a close path in graph. For example below given directed graph contains a cycle of maximum length of 5 starting...

## UVA Backtracking problem 639 Don’t Get Rooked solution

UVA Backtracking problem 639 Don’t Get Rooked solution. The given problem is based on backtracking. https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=580. ...

## Check whether partially filled sudoku is valid

Write c or c++ program to check whether partially filled sudoku is valid. The given grid size is 9×9, divided into 9 regions of 3×3. Each row must contain...

## c program to check line segment intersection

write a c program to check line segment intersection. we have already discussed the line segment intersection theory on our previous post http://wikistack.com/line-segment-intersection/. Now we know how to make...

## maximum submatrix sum problem

Given a 2D matrix find the maximum submatrix sum in it. The matrix is containing positive and negative integers. For example The maximum submatrix sum is 15 in the...

## traveling salesman problem dynamic programming

Traveling salesman problem dynamic programming. The tsp problem is considered to be difficult problem in computer science. Let us understand the classical traveling salesman problem with the help of...

## traveling salesman problem Brute force and dynamic programming

Traveling salesman problem Brute force and dynamic programming: Given a set of cities and the distances between them, find the shortest path visiting each of a given set of...

## how to print all paths in a directed graph

“how to print all paths in a directed graph” is famous question asked in programming interview. Given a directed graph write a c program to find all paths between...

## How to solve “Ones and zeros” Spoj Problem.

The problem published at http://www.spoj.com/problems/ONEZERO/ is very interesting because thinking its efficient solution using BFS is a complex task for seasonal programmer. I actually called seasonal because most or...

## Odd Sum Problem from UVa Online Judge

Write a c program to find the sum of all odd integers in a given range.For example, the summation of all the odd integers in the range is...