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163 symbols python3
Thu Oct 20 04:35:29 2016 Sait2000
N,*z=range(int(input())),[]
for r in N:z=[s+[(r,c)]for s in z for c in N if~-any(j in(r-i+j,c,c+r-i,c+i-r)for i,j in s)]
for s in z:print(*(j for i,j in s),sep='')


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