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IITM november 2016

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x % 3 can give only three values 0,1,2

when x%3=0 ------->(x+1)%3=1 ....so 0+1=1
when x%3=1 ------->(x+1)%3=2 ....so 1+2=3
when x%3=2 ------->(x+1)%3=0 ....so 2+0=2

so max value of x%3+(x+1)%3 = 3

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