Title and author:

ejss_model_guards_riddle Guard's Riddle, game to position numbers apart by the number they are in
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author image author image author image author image author image Shaun Quek, Loo Kang Wee, Francisco Esquembre, FĂ©lix JesĂșs GarcĂ­a Clemente., based on idea by Theresa Heng