摘要：
题意： 五百年后，龙珠的数量会出乎意料地增加，因此孙悟空（吴）将所有的龙球聚集在一起太难了。 他的国家有N个城市，世界上正好有N个龙球。起初，对于第i个龙球，神圣的龙将把它放在第i个城市。长年以来，一些城市的龙球将被运往其他城市。为了挽救体力，吴孔计划采用飞行云中云，一种神奇的飞云收集龙珠。 每次武 阅读全文
摘要：
Description Every cow’s dream is to become the most popular cow in the herd. In a herd of N (1 <= N <= 10,000) cows, you are given up to M (1 <= M <= 阅读全文
摘要：
Problem Description During the War of Resistance Against Japan, tunnel warfare was carried out extensively in the vast areas of north China Plain. Gen 阅读全文