func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     int n;     cin >> n;     long long ans = 0;     priority_queue<int, vector<int>, greater<int>> pq;     while (n--) {       int x;       cin >> x;       if (pq.size() && x > pq.top()) {         ans += x - pq.top();         pq.pop();         pq.push(x);       }       pq.push(x);     }     cout << ans;     return 0;   }   