I WA at #4 but I don't know why

I have test many tests in the other topic
and my program can give a right answer

so who can help me

Try this tests:
1999999 ans:2000002
90999   ans:91019
19992   ans:20002
0       ans:0
221121  ans:221122

Little hint:
Start comapring digits from middle.If right>left then increment middle digits by one using % operator.If digits have become zero carry on increment for next right and corrosponding left.For all other cond left=right
AC__0.078-1774 КБ