有两个长度为 2n2n2n 的非负实数组 a,ba, ba,b,满足 a1+a2+⋯+a2n=b1+b2+⋯+b2n=t>0a_1+a_2+ \cdots+a_{2n}=b_1+b_2+\cdots +b_{2n}=t>0a1+a2+⋯+a2n=b1+b2+⋯+b2n=t>0
且
aiai+2≥bi+bi+1 (i=1,2,3⋯2n)a_ia_{i+2}\geq b_i+b_{i+1} \ (i=1,2,3\cdots 2n)aiai+2≥bi+bi+1 (i=1,2,3⋯2n)(其中a2n+1=a1,a2n+2=a2,b2n+1=b1a_{2n+1}=a_1,a_{2n+2}=a_2,b_{2n+1}=b_1a2n+1=a1,a2n+2=a2,b2n+1=b1)
求 ttt 的最小值?