lingo 最优化-混合整数和0/1规划
请问用lingo计算一个：
15 4
max ∑ ∑[pgen(t)(i)-u(i)(t)*(1-u(i)(t-1)*pstart(i)]
t=1 i=1
s.t tstart(i)>=[n/a,5,n/a,n/a]
tstart(i)=0
i=1
pgen(i)(t)=0 (0