View Compilation Error

0_0_34047624_30758.cpp: In function 'int main()':
0_0_34047624_30758.cpp:109:6: error: 'arr' was not declared in this scope
      arr[i] = false;
      ^
0_0_34047624_30758.cpp:111:6: error: 'arr' was not declared in this scope
      arr[color[u]] = true;
      ^
0_0_34047624_30758.cpp:115:11: error: 'arr' was not declared in this scope
      if (!arr[z])
           ^