fi=minj=1i−1{fj−(Si−Sj)+(i−j)Ti,j}f_i=min_{j=1}^{i-1}\{f_j-(S_i-S_j)+(i-j)T_{i,j}\}fi=minj=1i−1{fj−(Si−Sj)+(i−j)Ti,j} Sx=∑i=1xtxS_x=\sum_{i=1}^xt_xSx=∑i=1xtx Ti,j=max{ti,tj+m}T_{i,j}=max\{t_i,t_j+m\}Ti,j=max{ti,tj+m} 像这种智障柿子可以斜优嘛…… 感觉有点难搞
