foo.cc: In function 'bool Query(int)':
foo.cc:60:5: warning: 'nR' may be used uninitialized in this function [-Wmaybe-uninitialized]
   60 |     if(F(nL)>nR)return false;
      |     ^~
foo.cc:20:22: warning: 'nL' may be used uninitialized in this function [-Wmaybe-uninitialized]
   20 |     if(x!=Fa[x])Fa[x]=F(Fa[x]);
      |                 ~~~~~^~~~~~~~~
foo.cc:32:15: note: 'nL' was declared here
   32 |     int UL,UR,nL,nR;
      |               ^~
foo.cc:32:12: warning: 'UR' may be used uninitialized in this function [-Wmaybe-uninitialized]
   32 |     int UL,UR,nL,nR;
      |            ^~
foo.cc:32:9: warning: 'UL' may be used uninitialized in this function [-Wmaybe-uninitialized]
   32 |     int UL,UR,nL,nR;
      |         ^~

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