View Compilation Error

0_0_13671735_20189.cpp: In member function 'void Dinic::init(int)':
0_0_13671735_20189.cpp:29:29: error: 'memset' was not declared in this scope
   memset(cur, 0, sizeof(cur));
                             ^
0_0_13671735_20189.cpp: In member function 'bool Dinic::bfs()':
0_0_13671735_20189.cpp:43:25: error: 'memset' was not declared in this scope
   memset(d, 0, sizeof(d));
                         ^
0_0_13671735_20189.cpp: In member function 'int Dinic::maxflow(int, int)':
0_0_13671735_20189.cpp:90:30: error: 'memset' was not declared in this scope
    memset(cur, 0, sizeof(cur));
                              ^
0_0_13671735_20189.cpp: In function 'int main()':
0_0_13671735_20189.cpp:106:35: error: 'memset' was not declared in this scope
   memset(Matrix, 0, sizeof(Matrix));
                                   ^