Robin Karp Algorithm
txt -> length N (string s)
pat -> length M (pattern)
N>=M
//To calculate hash from previous hash
// hash( txt[s+1 .. s+m] ) = ( d ( hash( txt[s .. s+m-1]) – txt[s]*h ) + txt[s + m] ) mod q
// hash( txt[s .. s+m-1] ) : Hash value at sh...
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