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added 9 characters in body

edited Sep 11, 2015 at 14:59

#C, trial division, 75 #

i=1; main(n){for(scanf("%d",&n);n%i++&&i<n;);printf("%d",n<3?n-1:n%i);}

Note special handling for n=1,2

answered Sep 11, 2015 at 14:46