Questions day 1

• a=1,b=2,c=3
  to
  a=2,b=3,c=1
• a=1,b=2,c=3,d=4
  to
  a=4,b=1,c=2,d=3
• a=1,b=2
  to
  a=2, b=1
• Generate the sequence 
  1,2,4,8,16 without using multiplication
• Print 1,-1,1,-,1,-1
• Sum the series, 1-3+5-7,,,,

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