View Compilation Error

0_0_29162799_30982.cpp: In function 'int hungary()':
0_0_29162799_30982.cpp:27:35: error: 'memset' was not declared in this scope
  memset(linker, -1, sizeof(linker)); 
                                   ^
0_0_29162799_30982.cpp: In function 'int main(int, char**)':
0_0_29162799_30982.cpp:42:25: error: 'memset' was not declared in this scope
   memset(g, 0, sizeof(g));
                         ^