#include #include #define ll long long using namespace std; const int N = 100010, r = 100000007; ll f[N], tr[N], lower[N]; int n; int lowbit(int x) { return x & -x; } void add(int x, ll c) { for (int i = x; i <= n; i += lowbit(i)) { tr[i] += c; } } ll sum(int x) { ll res = 0; for (int i = x; i; i -= lowbit(i)) res += tr[i]; return res; } int main() { while(1); ios::sync_with_stdio(false); int t; cin >> t; for (int Case = 1; Case <= t; Case++) { memset(tr, 0, sizeof tr); cin >> n; for (int i = 1; i <= n; i++) cin >> f[i]; ll res = 0; for (int i = 1; i <= n; i++) { int y = f[i]; lower[i] = sum(y - 1); add(y, 1); //res += R * (R - 1) / 2 - lower[i] * R; } memset(tr, 0, sizeof tr); for (int i = n; i; i--) { int y = f[i]; ll R = sum(n) - sum(y); add(y, 1); res += R * (R - 1) / 2 - lower[i] * R; } cout << "Case #" << Case << ": " << res % r << endl; } return 10; }