problem:
given at most 400 values of C. for each C,find an integer X (X<=10^18) such that 2^x mod (10^9 + 7) = c
i know that a value x must exist (X<10^9 + 7).but finding X is a problem for me. is there an efficient way to find x?
finding a solution for 2^x = c mod 10^9+7
problem:
given at most 400 values of C. for each C,find an integer X (X<=10^18) such that 2^x mod (10^9 + 7) = c
i know that a value x must exist (X<10^9 + 7).but finding X is a problem for me. is there an efficient way to find x?
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