foo.cc: In function ‘int solve(int)’:
foo.cc:34:35: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses]
   34 |                 if(sum[i]>=(sum[n]+1>>1))
      |                             ~~~~~~^~
foo.cc:36:1: warning: control reaches end of non-void function [-Wreturn-type]
   36 | }
      | ^