foo.cc: In function 'void dfs(int, int, int)':
foo.cc:30:10: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   30 |          if(map[px][py]=='*'||(map[px][py]=='D'&&now==t-1))
      |          ^~
foo.cc:37:11: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   37 |           if(flag)      //此处剪枝非常关键！！！
      |           ^~

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