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