下面约束段语句表达正确的是
A: @for(wh(i):@sum(vd(j):x(i,j))<=a(i));
B: for(wh(i):@sum(vd(j):x(i,j))<=ai(i));
C: @for(wh(i):@sum(vd(j):x(i,j))<=a(i);
D: @for(wh(i):sum(vd(j):x(i,j))<=ai(i));
A: @for(wh(i):@sum(vd(j):x(i,j))<=a(i));
B: for(wh(i):@sum(vd(j):x(i,j))<=ai(i));
C: @for(wh(i):@sum(vd(j):x(i,j))<=a(i);
D: @for(wh(i):sum(vd(j):x(i,j))<=ai(i));
举一反三
- 下面模型段语句表达错误的是 A: min=@sum(links(i,j):c(i,j)*x(i,j)); B: min=@sum(links:c*x); C: @for(vd(j):@sum(wh(i):x(i,j))=d(j)); D: @sum(vd(j):@for(wh(i):x(i,j))=d(j));
- 下面程序段的时间复杂度是：。 for（i=1;i<=m;++i） for（j=2;j<=m;++j） { ++x; a{i,j}=x;}
- 中国大学MOOC: @for(fa(i):@sum(sh(j):x(i,j))>=a(i));所对应的下列模型中形式正确的是
- 试分析下面代码段的时间复杂度： for（i=2；i<=n；++i） for（j=2；j<=i-1；++j） { ++x； a[i][j]=x; }[/i]
- 已知 x = [[1, 2, 3,], [4, 5, 6]]，那么表达式 sum([i*j for i,j in zip(*x)]) 的值为______。