0_0_19199796_19020.cpp: In function 'bool bfs()':
0_0_19199796_19020.cpp:39:30: error: 'memset' was not declared in this scope
memset(dis,-1,sizeof(dis));
^
0_0_19199796_19020.cpp: In function 'int main()':
0_0_19199796_19020.cpp:89:36: error: 'memset' was not declared in this scope
memset(head,-1,sizeof(head));
^
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