0_0_21316452_2994.cpp: In function 'int main()':
0_0_21316452_2994.cpp:19:16: error: 'a' was not declared in this scope
memset(a,0,sizeof(Node)*MAXN);
^
0_0_21316452_2994.cpp:19:27: error: 'Node' was not declared in this scope
memset(a,0,sizeof(Node)*MAXN);
^
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