#1657. 【2022 正睿 CSP 七连测 Day 5】Game

https://sjzezoj.com/submission/61318

S2OJ/1657/1657.cpp

@@ -0,0 +1,45 @@
+#include <iostream>
+#include <algorithm>
+#include <functional>
+#include <vector>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e5 + 5;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int n;
+    long long ans = 0;
+    std::vector<int> a;
+
+    cin >> n;
+
+    for (int i = 1, x; i <= n; i++) {
+        cin >> x;
+
+        if (x > 0) {
+            ans += x;
+        } else {
+            a.emplace_back(x);
+        }
+    }
+
+    std::sort(a.begin(), a.end(), std::greater<>());
+
+    long long sum1 = 0, sum2 = 0;
+
+    for (int i = 0; i < a.size(); i++) {
+        if (i & 1) sum1 += a[i];
+        else sum2 += a[i];
+    }
+
+    if (a.size() == n) cout << std::max(sum1 + a[0], sum2) << endl;
+    else cout << ans + std::max(sum1, sum2) << endl;
+
+    return 0;
+}