foo.cc: In function 'void test()':
foo.cc:43:27: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized]
   43 |     if(k&1||(!k)||(r==m-1)||(!l)){
      |        ~~~~~~~~~~~~~~~~~~~^~~~~~
foo.cc:42:15: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
   42 |     int k=m-(l-r+1);
      |              ~^~

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