View Compilation Error

0_0_38097911_29839.cpp: In function 'int hungary()':
0_0_38097911_29839.cpp:81:38: error: 'memset' was not declared in this scope
     memset(linker, -1, sizeof(linker));
                                      ^
0_0_38097911_29839.cpp: In function 'int main()':
0_0_38097911_29839.cpp:95:31: error: 'memset' was not declared in this scope
         memset(g, 0, sizeof(g));
                               ^