#include <bits/stdc++.h>
using namespace std;
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector<int> a(n - 1);
for (int i = 0; i < n - 1; i++) {
cin >> a[i];
}
auto Can = [&](int s) {
int sum = s;
for (int i = 0; i < n - 1; i++) {
sum += a[i];
if (sum > n) {
return 1;
} else {
if (sum < 1) {
return 2;
}
}
}
return 0;
};
int low = 1, top = n, ans = 0, cnt = 0;
while (low <= top) {
int mid = (low + top) / 2;
//cout << mid << " " << endl;
int qq = Can(mid);
if (qq == 0) {
cnt++;
ans = mid;
break;
} else {
if (qq == 1) {
top = mid - 1;
} else {
low = mid + 1;
}
}
}
if (Can(ans - 1) == 0 && ans > 1) {
cnt++;
}
if (Can(ans + 1) == 0 && ans < n) {
cnt++;
}
if (cnt != 1) {
cout << -1 << '\n';
} else {
cout << ans << " ";
int sum = ans;
for (int i = 0; i < n - 1; i++) {
sum += a[i];
cout << sum << " ";
}
}
return 0;
}
