0_0_19863067_23469.cpp: In member function 'void mat::init()':
0_0_19863067_23469.cpp:3:38: error: 'memset' was not declared in this scope
#define mst(a,b) memset(a,b,sizeof(a))
^
0_0_19863067_23469.cpp:12:14: note: in expansion of macro 'mst'
void init(){mst(c,0);}
^
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