i am getting negative value even after applying %M operation at all steps. i dont understand where i'm doing wrong//i wrote this code for C problem of today's contest-codeforces round #711
my code: my code
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i am getting negative value even after applying %M operation at all steps. i dont understand where i'm doing wrong//i wrote this code for C problem of today's contest-codeforces round #711
my code: my code
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x=(x+M)%M; this will convert the negative value in to positive. Prove- x= x%M + M%M then M%M=0 so x=x%M;
yeah, but why i am even getting negative values in the first place. i am computing values in such a way that their range is [0, M].
pw
can overflow, since it can reach(i-1)^1000
and is never modded.