cifre
Natural numbers are written one after another so they form a sequence of infinite length: 12345678910111213... Your task is to, for a given number N, find the Nth digit of this sequence.
InputThe first (and only) line of standard input contains a number N (1 <= N <= 2*10^9).
OutputTo the standard output, output the Nth digit of defined sequence.
Input:
Output:
20Output:
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