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C.cpp
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C.cpp
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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> Pii;
typedef pair<int, ll> Pil;
typedef pair<ll, ll> Pll;
typedef pair<ll, int> Pli;
typedef vector<vector<ll>> Mat;
#define fi first
#define se second
const ll MOD = 1e9 + 7;
const ll MOD2 = 998244353;
const ll MOD3 = 1812447359;
const ll INF = 1ll << 62;
const double PI = 2 * asin(1);
void yes() { printf("yes\n"); }
void no() { printf("no\n"); }
void Yes() { printf("Yes\n"); }
void No() { printf("No\n"); }
void YES() { printf("YES\n"); }
void NO() { printf("NO\n"); }
int n;
ll a[int(1e5 + 5)], total[int(1e5 + 5)];
ll solve() {
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> a[i];
}
for (int i = 1; i <= n; i++) {
total[i] = total[i - 1] + a[i];
}
ll ans = 0;
for (ll i = 1; i <= n; i++) {
ans += i * a[i];
}
for (int i = n - 1; i >= 1; i--) {
ans = max(ans, ans - (total[n] - total[i]));
}
return ans;
}
void reset() {
fill(a, a + n + 1, 0);
fill(total, total + n + 1, 0);
return;
}
int main() {
int t;
cin >> t;
for (int i = 0; i < t; i++) {
cout << solve() << endl;
reset();
}
return 0;
}