Please have a look at code and tell whats wrong due to which test cases are failing

#1
#2

@anuranjan8319918906 hey ,your variables in the gcd function need to be long long . Please make the required change so that integer dont overflow and change to long long int in place of int
ll cx, cy;
cx = y;
cy = (x - ((a / b) * y));
x = cx;
y = cy;

#3

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