题目内容

以下算法中加下划线的语句执行次数为（）。int m=0,i,j;for(i=1;i<=n;i++)for(j=1;j<=2*i;j++)m++;

A. n
B. n+1
C. n(n+1)
D. n*n

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某算法的时间复杂度为O(logn)，表明该算法的()。

A. 问题规模是O(logn)。
B. 执行时间等于O(logn)。
C. 执行时间与O(logn)成正比
D. 问题规模与O(logn)成正比。

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