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//User function Template for Java
class Solution {
public static int maxOnes(int a[], int n)
{
// Your code goes here
int ones = 0, max = 0;
for(int i=0; i<n; i++)
{
if(a[i] == 0)
{
a[i] = 1;
}
else
{
ones++;
a[i] = -1;
}
}
int maxsum = 0;
for(int i=0; i<n; i++)
{
maxsum += a[i];
if(maxsum > max)
{
max= maxsum;
}
if(maxsum < 0)
{
maxsum=0;
}
}
return max+ones;
}
}