Getting a wrong answer ATM problem

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1

Sir,
http://www.codechef.com/viewsolution/5155858 this is the link of my solution
Thanks.

2

Brother, it returns -0.40 for

50 50.10

You need to check if( ((x%5)==0) && (y>=(x+0.5)) , for correct answer .

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3

instead of if((double)x>(y+0.5)||x%5!=0) you should use if((double)x>(y+0.5)&& x%5!=0) as here you need follow both the conditions.

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