原创 E-room (km) 帶權二分圖
鏈接:https://www.nowcoder.com/acm/contest/143/E 來源:牛客網 題目描述 Nowcoder University has 4n students and n dormitories ( Fou
原创 AtCoder Regular Contest 082 F-UPC 6604 Sandglass
題目描述 We have a sandglass consisting of two bulbs, bulb A and bulb B. These bulbs contain some amount of sand. When we p