View Compilation Error

0_0_26730941_28323.cpp: In function 'void Modify(int, int, int)':
0_0_26730941_28323.cpp:53:24: error: 'n' was not declared in this scope
  int Color = Map[1ll*x*n + y];
                        ^
0_0_26730941_28323.cpp: In function 'int main()':
0_0_26730941_28323.cpp:119:15: error: 'n' was not declared in this scope
    Map[ 1ll*x*n + y] = 0;
               ^