We have the following equation:
$\sum_{i=1}^ny_i=A$
By considering this equation I want to find the minimum possible $B$ in the following equation to find the tightest bound and also when that $B$ is achieved.
$\min\Big(\sum_{i=1}^m(y_i-\sum_{j=1(j\neq i)}^my_{ij})\Big)\leq B,$
where, $m