s=$3{for(y=0;(x=y*$2+1)%s||($1>=x/=s)&&(y<=$1);y++);print x-$2,y-s}
5 5 2 5 5 3 4 50 48 49 4 1 1 4 0 1 4 3 2
1 2 4 5 49 50 4 3 1 4 2 1
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