#include <iostream>
#include <map>
using namespace std;
//¿¼ÂÇ·ÖÖÎ

map<int, int> sum;
void build(int p){
	int tmp;
	cin >> tmp;
	if(tmp == -1) return;
	sum[p] += tmp;
	build(p - 1);
	build(p + 1);
}

int main(){
	build(0);
	if(!sum.empty()){
		for(auto it = sum.begin(); it != sum.end(); ++it){
			cout << it->second << " ";
		}
	}
	return 0;
}