#include <bits/stdc++.h> #include <climits> using namespace std; typedef long long ll; int main() { int n; cin >> n; ll a[n], cursum = 0, maxa = 0, mina = 0; for (int i = 0; i < n-1; ++i) { cin >> a[i]; cursum += a[i]; maxa = max(maxa, cursum); mina = min(mina, cursum); } if (maxa - mina <= 0 || 1-mina+maxa < n) { cout << -1; return 0; } else { ll cur = 1-mina; cout << cur << " "; for (int i = 0; i < n-1; ++i) { cur += a[i]; cout << cur << " "; } } }