Topic: backtracking-problem / Level: beginner

• 101. Find all ways to fill a 4x4 grid with numbers such that each row and column contains distinct elements.
• 102. Print all unique sequences of coin flips resulting in a specific number of heads and tails.
• 103. Generate all valid sequences of moves in a board game with specified conditions for winning.
• 104. Solve the "Fibonacci Sequence" problem by generating the first n Fibonacci numbers using backtracking.
• 105. Find all unique subsets of characters from a given string, ensuring each subset is sorted alphabetically.
• 106. Print all combinations of toppings for a pizza, where each combination is unique and includes no duplicates.
• 107. Generate all distinct ways to traverse a grid from the top-left corner to the bottom-right corner without retracing steps.
• 108. Solve the "Crossing River" problem with constraints on which characters can be on the same side of the river.
• 109. Find all valid configurations of a team based on skill levels and roles assigned to each member.
• 110. Print all unique paths in a binary tree, ensuring that paths are printed from the root to each leaf node.
• 111. Generate all valid expressions from a given set of numbers and operators that result in a specific target value.
• 112. Solve the "Domino Tiling" problem for a given grid size by generating all possible arrangements of dominoes.
• 113. Find all unique permutations of a given list of colors used to create various arrangements for a project.
• 114. Print all combinations of menu items that can be served at a party, ensuring no duplicate combinations are included.
• 115. Generate all distinct arrangements of letters for a given word that contains multiple identical letters.
• 116. Solve the "Eight Queens" problem on an 8x8 chessboard, ensuring all solutions are valid and unique.
• 117. Find all ways to pack items in a box given weight limits and specific item constraints for packing.
• 118. Print all valid expressions that can be formed from numbers and operators that equal a specified target.
• 119. Generate all unique sets of numbers that can be created from a pool of numbers while adhering to constraints.
• 120. Solve the "Word Break" problem by finding all possible segments of a string that form valid words based on a dictionary.
• 121. Find all distinct ways to reach the top of a staircase given specific steps allowed at each position.
• 122. Print all valid paths from one corner of a grid to another, ensuring that obstacles are avoided.
• 123. Generate all possible ways to arrange numbers in a sequence based on specific placement rules.
• 124. Solve the "Set Cover" problem by finding all unique combinations of sets that cover a specific universe.
• 125. Find all unique subsets of a given list of items while ensuring each subset is represented once in the output.
• 126. Print all combinations of colors used to paint a fence with specific rules regarding adjacent colors.
• 127. Generate all valid seating arrangements for a group of people based on given preferences.
• 128. Solve the "Letter Combinations of a Phone Number" problem by finding all valid sequences based on digit mappings.
• 129. Find all valid configurations of a Tic-Tac-Toe game board after a certain number of moves have been made.
• 130. Print all combinations of ingredients that can be used to create a dish while considering dietary restrictions.
• 131. Generate all unique ways to navigate through a maze using a set of predefined moves.
• 132. Solve the "Palindrome Partitioning" problem for a given string by finding all valid palindromic cuts.
• 133. Find all distinct paths through a graph from one node to another while adhering to specific movement rules.
• 134. Print all unique combinations of strings that can be formed from a list of provided characters.
• 135. Generate all valid ways to construct a binary search tree from a given set of integers.
• 136. Solve the "Combination Lock" problem by generating all possible combinations based on given inputs.
• 137. Find all ways to schedule tasks given specific time constraints and dependencies between tasks.
• 138. Print all valid configurations of a parking lot based on the number of spaces available and types of vehicles.
• 139. Generate all unique subsets of items that can be selected from a collection without exceeding a weight limit.
• 140. Solve the "Shortest Path" problem in a grid with weighted cells to determine the optimal route.
• 141. Find all unique arrangements of a set of marbles of different colors in a line.
• 142. Print all combinations of dice rolls that can result in a specific sum when rolled multiple times.
• 143. Generate all valid paths in a labyrinth represented as a grid while avoiding traps and dead ends.
• 144. Solve the "N-Queens II" problem by counting the total number of distinct solutions for an n×n chessboard.
• 145. Find all unique ways to combine ingredients to create different recipes while maintaining the proper ratios.
• 146. Print all distinct paths from a source node to a destination node in a weighted directed graph.
• 147. Generate all valid sequences of moves for a chess piece on a chessboard given specific constraints.
• 148. Solve the "String Permutations" problem by generating all unique arrangements of a string containing repeating characters.
• 149. Find all valid combinations of drinks for a party based on dietary preferences and available ingredients.
• 150. Print all unique combinations of musical notes that can be played in a specific sequence.

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