MOD = 10**9 + 7 n = int(input()) p = list(map(int, input().split())) # Precompute factorials modulo MOD fact = [1] * (n + 1) for i in range(1, n + 1): fact[i] = fact[i - 1] * i % MOD class FenwickTree: def __init__(self, size): self.n = size self.tree = [0] * (self.n + 2) # 1-based indexing def update(self, idx, delta): while idx <= self.n: self.tree[idx] += delta idx += idx & -idx def query(self, idx): res = 0 while idx > 0: res += self.tree[idx] idx -= idx & -idx return res # Initialize Fenwick Tree with all elements present ft = FenwickTree(n) for i in range(1, n + 1): ft.update(i, 1) ans = 0 for i in range(n): current = p[i] # Number of elements less than current cnt = ft.query(current - 1) ans = (ans + cnt * fact[n - i - 1]) % MOD # Remove current element ft.update(current, -1) print((ans + 1) % MOD)