P7432 [THUPC2017] 钦妹的玩具商店

https://www.luogu.com.cn/record/101743741

Luogu/P7432/P7432.cpp

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+#include <iostream>
+#include <algorithm>
+#include <iterator>
+#include <utility>
+#include <vector>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int mod = 1e8 + 7;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int t;
+
+    cin >> t;
+
+    while (t--) {
+        int n, m, q;
+        std::vector<int> c{{0}}, v{{0}}, t{{0}};
+
+        cin >> n >> m >> q;
+
+        std::copy_n(std::istream_iterator<int>(cin), n, std::back_inserter(c));
+        std::copy_n(std::istream_iterator<int>(cin), n, std::back_inserter(v));
+        std::copy_n(std::istream_iterator<int>(cin), n, std::back_inserter(t));
+
+        std::vector<std::vector<std::pair<int, int>>> vec(n + 1);
+
+        for (int i = 1; i <= n; i++) {
+            for (int j = 1; j <= t[i]; j <<= 1) {
+                vec[i].emplace_back(c[i] * j, v[i] * j);
+
+                t[i] -= j;
+            }
+
+            if (t[i]) {
+                vec[i].emplace_back(c[i] * t[i], v[i] * t[i]);
+            }
+        }
+
+        std::vector<std::vector<int>>
+            f(n + 2, std::vector<int>(m + 2, 0)),
+            g(n + 2, std::vector<int>(m + 2, 0));
+
+        for (int i = 1; i <= n; i++) {
+            for (int j = m; j >= 0; j--) {
+                f[i][j] = std::max(f[i][j], f[i - 1][j]);
+            }
+
+            for (auto o : vec[i]) {
+                for (int j = m; j >= o.first; j--) {
+                    f[i][j] = std::max(f[i][j], f[i][j - o.first] + o.second);
+                }
+            }
+        }
+
+        for (int i = n; i; i--) {
+            for (int j = m; j >= 0; j--) {
+                g[i][j] = std::max(g[i][j], g[i + 1][j]);
+            }
+
+            for (auto o : vec[i]) {
+                for (int j = m; j >= o.first; j--) {
+                    g[i][j] = std::max(g[i][j], g[i][j - o.first] + o.second);
+                }
+            }
+        }
+
+        int lst = 0;
+
+        while (q--) {
+            int x, y;
+
+            cin >> x >> y;
+
+            int l = std::min((x + lst - 1) % n + 1, (y + lst - 1) % n + 1),
+                r = std::max((x + lst - 1) % n + 1, (y + lst - 1) % n + 1);
+
+            int ans = 0, sum = 0;
+            std::vector<int> h(m + 1);
+
+            for (int i = 0; i <= m; i++) {
+                for (int j = 0; i + j <= m; j++) {
+                    h[i + j] = std::max(h[i + j], f[l - 1][i] + g[r + 1][j]);
+                }
+            }
+
+            for (int i = 1; i <= m; i++) {
+                ans = (ans + h[i]) % mod;
+                sum ^= h[i];
+            }
+
+            cout << (lst = ans) << ' ' << sum << endl;
+        }
+    }
+
+    return 0;
+}