0_0_20654456_32372.cpp: In function 'void insert(int)':
0_0_20654456_32372.cpp:20:13: error: 'root' was not declared in this scope
node *cur=&root;
^
0_0_20654456_32372.cpp: In function 'll search(int)':
0_0_20654456_32372.cpp:38:13: error: 'root' was not declared in this scope
node *cur=&root;
^
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