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));
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));
举一反三
- 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));
- 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
- 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______。
- 中国大学MOOC: 写出下面程序执行后的运行结果。#include <stdio.h>int main(){int x[]={1,3,5,7,2,4,6,0},i,j,k;for(i=0;i<3;i++)for (j=2;j>=i;j--)if(x[j+1]>x[j]) { k=x[j]; x[j]=x[j+1]; x[j+1]=k;}for(i=0;i<3;i++)for(j=4;j<7-i;j++)if(x[j+1]>x[j]) { k=x[j]; x[j]=x[j+1]; x[j+1]=k;}for (i=0;i<3;i++)for(j=4;j<7-i;j++)if(x[j]>x[j+1]) { k=x[j]; x[j]=x[j+1]; x[j+1]=k;}for (i=0;i<8;i++) printf("%d",x[i]); return 0;}