RT 翻译内容： ∑1≤i≤j≤nmaxi≤l≤r≤j(r−l+1)[∑k=lrsk=r−l+1]\sum\limits_{1 \le i \le j \le n} \max\limits_{i \le l \le r \le j}(r-l+1)[\sum\limits_{k=l}^r s_k=r-l+1]1≤i≤j≤n∑i≤l≤r≤jmax(r−l+1)[k=l∑rsk=r−l+1]
