randRange(0, 9)
randRange(0, 9)
randRange(1, 9)
randRange(0, 9)
randRange(0, 9)
randRange(1, 9)
100 * A_100 + 10 * A_10 + A_1
100 * B_100 + 10 * B_10 + B_1
[]
graph.subtractor=new Subtractor(A,B),graph.subtractor.show(),DUMMY=Array(graph.subtractor.getNumHints())
A - B
graph.subtractor.showHint()