Write a funtion that finds repeating characters in a string.
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Write a routine to reverse a series of numbers without using an array.
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Write a function that allocates memory for a two-dimensional array of given size(parameter x & y)
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How would you do conditional compilation ?
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Given an array t[100] which contains numbers between 1 and 99. Return the duplicated value. Try both O(n) and O(n-square).
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Write efficient code for extracting unique elements from a sorted list of array.
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Print an integer using only putchar. Try doing it without using extra storage.
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Implement a TIC-TAC-TOE game assuming Computer as one of the player. Optimize it for fast computer play time and space. Do some analysis on memory and processing requirements .
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You are given two strings: S1 and S2. Delete from S2 all those characters which occur in S1 also and create a clean S2 with the relevant characters deleted.
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Write a small lexical analyzer for expressions like “a*b” etc.
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