死循环代码求调！

# include <bits/stdc++.h>
# define int long long
# define endl '\n'
# define str string
# define fst ios::sync_with_stdio (0); cin.tie (0); cout.tie (0);

using namespace std;

const int N = 1e6 + 5, M = 2e6 + 5;
const int P = 1e9 + 7;
const int INF = 0x3f3f3f3f;
const int LNF = 0x3f3f3f3f3f3f3f3f;

int n;
int ans;
int t[N];
int sum;

inline int lowbit (int x) {
	return (x & (- x));
}

signed main () {
	fst;
	cin >> n;
	for (int i = 1, a; i <= n; i ++ ) {
		cin >> a;
		int x = a;
		while (a <= n) {
			t[a] ++;
			a += lowbit (a);
		} 
		sum = 0;
		while (x) {
			sum += t[x];
			x -= lowbit (x);
		}
		ans += (i - sum);
	}
	cout << ans;
	return 0;
}