View Compilation Error

0_0_35355930_8720.cpp: In function 'void input()':
0_0_35355930_8720.cpp:25:35: error: 'memset' was not declared in this scope
     memset( map, 0, sizeof( map ) );
                                   ^
0_0_35355930_8720.cpp: In function 'int bfs()':
0_0_35355930_8720.cpp:78:38: error: 'memset' was not declared in this scope
     memset( step, -1, sizeof( step ) );
                                      ^
0_0_35355930_8720.cpp:91:46: error: 'abs' was not declared in this scope
             if ( abs( map[p.x][p.y][p.state] ) < 3 && map[p.x][p.y][p.state] > 0 ) continue;
                                              ^