#include<bits/stdc++.h> #define ll long long #define pb push_back #define ii pair<int, int> #define fi first #define se second #define all(a) a.begin(), a.end() #define int ll using namespace std; const int N = 3e5+5; const int mod = 1e9+7; const int inf = 2e9; void solve() { int n; cin>>n; vector<int> a(n, 0); for (int i = 1; i < n; i++) cin>>a[i]; for (int i = 2; i < n; i++) a[i] += a[i-1]; int mx = -inf, mn = inf; for (int i = 1; i < n; i++) mx = max(mx, a[i]), mn = min(mn, a[i]); int cnt = 0, ss = -1; for (int st = 1; st <= n; st++) { if (st + mx <= n && st + mn >= 1) cnt++, ss = st; } if (!cnt || cnt > 1) { cout<<"-1"; return; } for (int i = 0; i < n; i++) { cout<<ss + a[i]<<" "; } } signed main() { ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0); // freopen("input.txt", "r", stdin); // freopen("output.txt", "w", stdout); solve(); }