View Compilation Error

0_0_24807355_27755.cpp: In function 'int main()':
0_0_24807355_27755.cpp:47:26: error: 'memset' was not declared in this scope
  memset(map,0,sizeof(map));
                          ^
0_0_24807355_27755.cpp:60:6: error: 'i' was not declared in this scope
  for(i = 1;i<=m;i++){
      ^