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```
class Solution {
public:
int removeDuplicates(int A[], int n) {
if( n == 0 ) {
return 0;
}
int count = 1;
int last = A[0];
int index = 1;
for( int i = 1 ; i < n ; i++ ) {
if( A[i] == last && count == 1 ) {
A[index++] = A[i];
count++;
}
else if( A[i] == last ) {
}
else {
A[index++] = A[i];
count = 1;
last = A[i];
}
}
return index;
}
};
```

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