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LeetSolve

C++ Solution to Coding Challenge 287. Find the Duplicate Number

The Pigeonhole principle

Problem statement

Given an array of integers nums containing n + 1 integers where each integer is in the range [1, n] inclusive.

There is only one repeated number in nums, return this repeated number.

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LeetSolve shares how to solve a coding question in C++. The questions are selected from leetcode.com. You can learn from LeetSolve’s posts essential algorithms, basic data structures, elementary C++ programming language and common coding techniques.

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