func_code_string: #include <bits/stdc++.h>   using namespace std;   struct node {     long long x;     bool s;     node(long long a, bool b) { x = a, s = b; }   };   bool operator<(node a, node b) { return a.x > b.x; }   priority_queue<node> pq;   int main() {     int n;     long long temp;     cin >> n;     long long ans = 0;     for (int i = 1; i <= n; i++) {       cin >> temp;       if (pq.empty() || pq.top().x > temp) {         pq.push(node(temp, 0));       } else {         long long now = pq.top().x;         bool se = pq.top().s;         pq.pop();         if (se) pq.push(node(now, 0));         ans += temp - now, pq.push(node(temp, 1));       }     }     cout << ans << endl;     return 0;   }   