can anyone help with solving this question ?

Правка en2, от nqs_1, 2019-12-13 10:28:12

can anyone help with solving this question of codechef , which I am unable to solve? here is the link to the question ZERO THE PATH , thx in Advance.

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en2 Английский nqs_1 2019-12-13 10:28:12 4
en1 Английский nqs_1 2019-12-13 10:27:43 248 Initial revision (published)