/in/foo.cc: In function 'void work()':
/in/foo.cc:23:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 for(k=1;k<=n;k++)if(b[k]==0)x++;else if(b[k]==-1)y++;if(x<=m&&x+y>=m)chk();}}}
 ^~~
/in/foo.cc:23:54: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
 for(k=1;k<=n;k++)if(b[k]==0)x++;else if(b[k]==-1)y++;if(x<=m&&x+y>=m)chk();}}}
                                                      ^~