foo.cc: In function 'void dfs(int, int, int, int)':
foo.cc:9:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    9 |                 if(c<mi)mi=c;if(xl>ma)ma=xl;return ;
      |                 ^~
foo.cc:9:30: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    9 |                 if(c<mi)mi=c;if(xl>ma)ma=xl;return ;
      |                              ^~

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