Here’s a link to my solution : CodeChef: Practical coding for everyone

I don’t understand where i am going wrong …is it the double or some other precision thing i am missing ??

I’m not a C/C++ guru, but what is `ans.a[i][j]=double(i==j);`

doing?

See my test case on ideone - pgtqzj - Online C++ Compiler & Debugging Tool - Ideone.com

actually u are not giving a valid input …

the condition clearly states Sum of ai,1+…ai,n = 1

but the sum of all probabilities in the first row of your testcase is 3.

ans.a[i][j]=double(i==j); is for making an identity matrix.

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Ok I thought so (`double(i==j)`

), hopefully it’s better now, those two ones was an error… Still printing 0.75, I’d expect 0.25, hopefully input is ok now…

But why 0.25 : two cases arise here:

- a -> a -> a =0.5 x 0.5 = 0.25
- a->b->a =0.5 x 1=0.5

total 0.75…right??

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Of course, my bad, I’ll get back with better test case