View Compilation Error

0_0_32322232_8452.cpp: In function 'bool check(int, int)':
0_0_32322232_8452.cpp:20:5: error: 'nx' was not declared in this scope
  if(nx>=0 && nx<n && ny>=0 && ny<m && mp[nx][ny]==0){
     ^
0_0_32322232_8452.cpp:20:22: error: 'ny' was not declared in this scope
  if(nx>=0 && nx<n && ny>=0 && ny<m && mp[nx][ny]==0){
                      ^