day 08 - cool online solution
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function Q(u,a,d) {
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for (; f=r[X,Y]; Y+=a) {
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if (f>d) {
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A+=!v[X,Y]++
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d=f
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}
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X+=u
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}
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}
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function V(i,e,w) {
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f=r[++w*i+X, Y+w*e]
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f && f<r[X,Y] ? V(i,e,w) : s*=w-!f
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}
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END {
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for(;--X;Q(Q(0,-1),Y=1))
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for(Y=1; ++Y<NR; s>B && B=s)
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V(V(s=1),1)
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V(V(-1),-1)
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print A,B
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}
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OFS=RS {
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for(gsub(x=z,FS); x++ < X=NF; )
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r[x, Y=NR] = 1$x
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Q(-1)
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Q(X=1)
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}
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