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vasya solved four easy and three hard problems dime solved five easy and two hard problems misha solved one easy and six hard problems 4+5+1=10 easy problems 3+2+6=11 hard problems
vasya solved four easy and three hard problems dime solved five easy and two hard problems misha solved one easy and six hard problems 4+5+1=10 easy problems 3+2+6=11 hard problems