View Compilation Error

0_0_21562110_403.cpp: In function 'int main()':
0_0_21562110_403.cpp:21:33: error: 'memset' was not declared in this scope
         memset(map,0,sizeof(map));
                                 ^
0_0_21562110_403.cpp: In function 'int MaxMatch()':
0_0_21562110_403.cpp:59:31: error: 'memset' was not declared in this scope
     memset(xM, -1, sizeof (xM));
                               ^
0_0_21562110_403.cpp: In function 'bool Can()':
0_0_21562110_403.cpp:106:44: error: 'memset' was not declared in this scope
             memset(chk, false, sizeof (chk));
                                            ^