We can obtained inverse sum from computing total sum and sum from Weight sum I.

```
public class Solution {
int deepest = 0;
int sum2 = 0;
private int helper(NestedInteger cur, int depth){
int sum = 0;
if(cur.isInteger()){
sum += cur.getInteger()*depth;
sum2 += cur.getInteger();
deepest = Math.max(deepest, depth);
}else{
List<NestedInteger> nexts= cur.getList();
for(NestedInteger next : nexts){
sum += helper(next, depth+1);
}
}
return sum;
}
public int depthSumInverse(List<NestedInteger> nestedList) {
int depth = 1;
int sum1 = 0;
for(NestedInteger cur: nestedList){
sum1 += helper(cur, 1);
}
return sum2*(deepest+1)-sum1;
}
}
```