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  • ...function for an affine cipher if the encryption function is c = (15p + 13) mod 26? ...d rather than 7? Can you still conclude that there must be a pair of these integers with a sum equal to 13?
    4 KB (553 words) - 19:49, 17 May 2021
  • ...,...,V_k such that every arc of G goes from some V_i to V_{i+1}, 1 <= i <= k. * Full credit: output either "not possible" or the smallest k such that the graph can be partitioned as described
    17 KB (2,872 words) - 16:17, 5 January 2023
  • * &#8484;: the set of integers * &#8484;<sub>n</sub>: the integers mod n
    12 KB (2,001 words) - 12:38, 21 November 2022