the answer of Ex_1_1_36

[Nancy945]

I think s[a[i]][i]++; is right not s[i][a[i]]++; in 22 line num. Am I wrong?

[huangyichun]

we can set m=3 n=1, -> s[3][3] 0 0 0
0 0 0
0 0 0
a[]= 0 , 1 ,2;
if not StdRandom.shuffle(a) the result is 1 0 0
0 1 0
0 0 1
j=a[i]
you should restart understand the topic. you should known j = a[i]

thank you for your question !