#include<stdio.h>
#include<iostream>
using namespace std;
int main()
{
int n;
while (scanf("%d", &n), n--)
{
int a[n], i, j;
for (i = 0; i < n; i++)
{
cin >> a[i] ;
}
for (j = 0; j < n; j++)
{
if(a[j] > 0)
a[j+1] = a[j] + a[j+1];
else
a[j+1] = a[j] - a[j+1];
}
printf("%d\n", a);
}
}