View Compilation Error

0_0_32161728_18040.cpp: In function 'int KM()':
0_0_32161728_18040.cpp:48:30: error: 'sub' was not declared in this scope
     if(visitedP[p]) expx[p]-=sub;
                              ^
0_0_32161728_18040.cpp:49:30: error: 'sub' was not declared in this scope
     if(visitedH[p]) expy[p]+=sub;
                              ^