View Compilation Error

0_0_17919731_16783.cpp: In function 'int hungary()':
0_0_17919731_16783.cpp:27:36: error: 'memset' was not declared in this scope
     memset(linker,-1,sizeof(linker));
                                    ^
0_0_17919731_16783.cpp: In function 'int main()':
0_0_17919731_16783.cpp:43:29: error: 'memset' was not declared in this scope
         memset(g,0,sizeof(g));
                             ^