In this problem, a tree is an undirected graph that is connected and has no cycles. The given input is a graph that started as a tree with N nodes (with distinct values 1, 2, ..., N), with one additional edge added. The added edge has two different v
问题: SQL> conn system/[email protected] ERROR:ORA-12537: TNS:connection closed Warning: You are no longer connected to ORACLE. 解决: chmod 6751 $ORACLE_HOME/bin/oracle