/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:20:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
         if(pd(m))  
         ^~
/in/foo.cc:22:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
             ch[m]=0;  
             ^~