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40 lines
652 B
C++
40 lines
652 B
C++
#include <iostream>
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#include <functional>
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#include <queue>
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#include <vector>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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const int N = 3e5 + 5;
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int n, p[N];
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long long ans;
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std::priority_queue<int, std::vector<int>, std::greater<>> q;
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> n;
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for (int i = 1; i <= n; i++) {
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cin >> p[i];
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}
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for (int i = 1; i <= n; i++) {
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if (!q.empty() && q.top() < p[i]) {
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ans += p[i] - q.top();
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q.pop();
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q.emplace(p[i]);
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}
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q.emplace(p[i]);
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}
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cout << ans << endl;
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return 0;
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}
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