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Why is my backtracking algorithm too slow in competitive programming?

Backtracking is slow when it explores too many possibilities. Pruning unnecessary branches can significantly speed it up.

Backtracking algorithms can be slow because they explore all possible solutions, which leads to exponential time complexity. To make backtracking faster, you need to implement pruning techniques that eliminate branches that cannot possibly lead to a solution. This involves checking constraints early to prevent exploring invalid states. For example, in problems like the N-Queens problem, pruning can be done by checking if a queen’s position is valid before proceeding further. Another technique is memoization to avoid re-exploring states that have already been checked. By reducing the number of possibilities the algorithm needs to explore, you can improve the efficiency of your backtracking approach and solve competitive programming problems faster.

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