/in/foo.cc: In function 'int main()':
/in/foo.cc:44:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if(i!=ans)
   ^~
/in/foo.cc:46:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
    for(j=sum;j>=a[i];j--)
    ^~~
/in/foo.cc:66:14: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(i=1;i<=k+1;i++)
             ~^~