'commit'

TangDou/CSP-J/AcWingTraining/T1/442_2.cpp

@@ -0,0 +1,28 @@
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 1005;
+
+struct Node {
+    int num;
+    int sum;
+} a[N];
+bool cmp(Node x, Node y) {
+    return x.sum < y.sum;
+}
+int main() {
+    int n;
+    cin >> n;
+    for (int i = 0; i < n; i++) {
+        cin >> a[i].sum;
+        a[i].num = i + 1;
+    }
+    sort(a, a + n, cmp);
+    double temp = 0.00;
+    for (int i = 0; i < n; i++) {
+        cout << a[i].num << " ";
+        temp += (n - (i + 1)) * a[i].sum;
+    }
+    cout << endl;
+    printf("%.2f", temp / n * 1.00);
+    return 0;
+}