0_0_12818539_20505.cpp:1:25: bits/stdc++.h: No such file or directory
0_0_12818539_20505.cpp:10: error: expected constructor, destructor, or type conversion before '<' token
0_0_12818539_20505.cpp:10: error: expected `,' or `;' before '<' token
0_0_12818539_20505.cpp: In constructor `Node::Node()':
0_0_12818539_20505.cpp:14: error: `NULL' undeclared (first use this function)
0_0_12818539_20505.cpp:14: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12818539_20505.cpp: In constructor `Node::Node(int)':
0_0_12818539_20505.cpp:15: error: `NULL' undeclared (first use this function)
0_0_12818539_20505.cpp: In function `void insert(Node*&, int)':
0_0_12818539_20505.cpp:19: error: `NULL' undeclared (first use this function)
0_0_12818539_20505.cpp: In function `void deltree(Node*&)':
0_0_12818539_20505.cpp:31: error: `NULL' undeclared (first use this function)
0_0_12818539_20505.cpp: In function `void DFS(Node*)':
0_0_12818539_20505.cpp:40: error: `NULL' undeclared (first use this function)
0_0_12818539_20505.cpp:41: error: `res' undeclared (first use this function)
0_0_12818539_20505.cpp: In function `int main()':
0_0_12818539_20505.cpp:47: error: `scanf' undeclared (first use this function)
0_0_12818539_20505.cpp:47: error: `EOF' undeclared (first use this function)
0_0_12818539_20505.cpp:48: error: `res' undeclared (first use this function)
0_0_12818539_20505.cpp:50: error: `NULL' undeclared (first use this function)
0_0_12818539_20505.cpp:56: error: `printf' undeclared (first use this function)
0_0_12818539_20505.cpp:58: error: `puts' undeclared (first use this function)
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