今年春節前，海外留學歸來的高先生推開家門，看到的景象讓他愣在原地：母親一手握着手機，在窗台前的水晶堆裏挑挑揀揀。從大到小的水晶擺件佔滿整個窗台，都是母親幾個月來從直播間「淘」回來的。更讓他擔憂的是，母親肩頸疼痛已嚴重到走路、站立都成問題，總是佝僂着背。
Did she think about quitting at that point?
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Жители Санкт-Петербурга устроили «крысогон»17:52
- assignment: Array of booleans. If the formula is satisfiable provide an assignment for each variable from 1 to N. If the formula is not satisfiable this field is null.
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