P4597 序列 sequence

https://www.luogu.com.cn/record/99038877

Luogu/P4597/P4597.cpp

@@ -0,0 +1,35 @@
+#include <iostream>
+#include <queue>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e6 + 5;
+
+int n;
+long long ans;
+std::priority_queue<long long> q;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> n;
+
+    for (int i = 1, x; i <= n; i++) {
+        cin >> x;
+
+        q.emplace(x);
+
+        if (x < q.top()) {
+            ans += q.top() - x;
+            q.pop();
+            q.emplace(x);
+        }
+    }
+
+    cout << ans << endl;
+
+    return 0;
+}