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  • \$\begingroup\$ Sandbox \$\endgroup\$ Commented Mar 26, 2021 at 15:24
  • 6
    \$\begingroup\$ The fact that the last case is supposed to be false is a weird edge case. The empty string B is made of exactly 0 substring of any A, for any n. \$\endgroup\$ Commented Mar 26, 2021 at 16:10
  • \$\begingroup\$ @Arnauld I'll say no empty strings for A or B then \$\endgroup\$ Commented Mar 26, 2021 at 16:27
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    \$\begingroup\$ If n=2, a=abzaxy, and b=xyzab, should that return true or false? I'm guessing the "possibly overlapping" means that is true.... though I think the problem is more interesting if that one is supposed to be false. \$\endgroup\$ Commented Mar 27, 2021 at 17:55
  • \$\begingroup\$ @Jonah yes, that should be true \$\endgroup\$ Commented Mar 27, 2021 at 20:14