P1725 琪露诺

https://www.luogu.com.cn/record/86099060

Luogu/P1725/P1725.cpp

@@ -0,0 +1,39 @@
+#include <iostream>
+#include <algorithm>
+#include <limits>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 2e5 + 5;
+
+int n, l, r, a[N << 1];
+long long f[N << 1], ans = std::numeric_limits<int>::min();
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    std::fill_n(f + 1, (N << 1) - 1, std::numeric_limits<int>::min());
+
+    cin >> n >> l >> r;
+
+    for (int i = 0; i <= n; i++) {
+        cin >> a[i];
+    }
+
+    for (int i = l; i < n + r; i++) {
+        for (int j = std::max(i - r, 0); j <= i - l; j++) {
+            f[i] = std::max(f[i], f[j] + a[i]);
+        }
+    }
+
+    for (int i = n; i < n + r; i++) {
+        ans = std::max(ans, f[i]);
+    }
+
+    cout << ans << endl;
+
+    return 0;
+}