Has anyone faced the same problem before in Java? I am changing long from primitive to non-primitive. To be sure, I have done it multiple times.
public class Solution {
public int solve(ArrayList<Integer> A) {
int n = A.size();
long[] left = new long[n];
long[] right = new long[n];
/*
This is giving me error
Long[] left = new Long[n];
Long[] right = new Long[n];
*/
Long sum = 0L;
for(int i = 0; i< n; i++){
if((i % 2) == 0){
sum += A.get(i);
}
else{
sum -= A.get(i);
}
left[i] = sum;
}
sum = 0L;
for(int i = n-1; i >=0; i--){
if((i % 2) == 0){
sum += A.get(i);
}
else{
sum -= A.get(i);
}
right[i] = sum;
}
int ans = 0;
for(int i = 0; i < n; i++){
if(left[i] == right[i])
ans++;
}
return ans;
}
}