A. 填数游戏

https://ac.nowcoder.com/acm/contest/view-submission?submissionId=64546279

NowCoder/contest/65194/A/A.cpp

@@ -0,0 +1,54 @@
+#include <iostream>
+#include <algorithm>
+#include <functional>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e5 + 5;
+
+int n, m, a[N], b[N];
+long long ans;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> n >> m;
+
+    for (int i = 1; i <= n; i++) {
+        cin >> a[i];
+    }
+
+    for (int i = 1; i <= m; i++) {
+        cin >> b[i];
+    }
+
+    std::sort(a + 1, a + 1 + n, std::greater<>());
+    std::sort(b + 1, b + 1 + m, std::greater<>());
+
+    int i = 1;
+
+    for (; i <= n && a[i] >= 0 && b[i] >= 0; i++) {
+        ans += static_cast<long long>(a[i]) * b[i];
+    }
+
+    std::sort(a + i, a + 1 + n);
+    std::sort(b + i, b + 1 + m);
+
+    for (; i <= n && a[i] < 0 && b[i] < 0; i++) {
+        ans += static_cast<long long>(a[i]) * b[i];
+    }
+
+    std::sort(a + i, a + 1 + n, std::greater<>());
+    std::sort(b + i, b + 1 + m, std::greater<>());
+
+    for (; i <= n; i++) {
+        ans += static_cast<long long>(a[i]) * b[i];
+    }
+
+    cout << ans << endl;
+
+    return 0;
+}