/in/foo.cc: In function 'int main()':
/in/foo.cc:11:9: warning: iteration 2 invokes undefined behavior [-Waggressive-loop-optimizations]
   if(a[i]<m)
      ~~~^
/in/foo.cc:9:15: note: within this loop
  for(int i=1;i<=3;i++)
              ~^~~
/in/foo.cc:23:6: warning: array subscript is above array bounds [-Warray-bounds]
  sort(c+1,c+4);
  ~~~~^~~~~~~~~
/in/foo.cc:23:6: warning: array subscript is above array bounds [-Warray-bounds]
/in/foo.cc:23:6: warning: array subscript is above array bounds [-Warray-bounds]