text: Add the calculated value of current index to count
code: if ( pref [ i ] - i % k + k ) % k in cnt : NEW_LINE INDENT cnt [ ( pref [ i ] - i % k + k ) % k ] += 1 NEW_LINE DEDENT else : NEW_LINE INDENT cnt [ ( pref [ i ] - i % k + k ) % k ] = 1 NEW_LINE DEDENT