P4766 [CERC2014]Outer space invaders

https://www.luogu.com.cn/record/86410520

Luogu/P4766/P4766.cpp

@@ -0,0 +1,83 @@
+#include <iostream>
+#include <algorithm>
+#include <array>
+#include <limits>
+#include <tuple>
+#include <vector>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 305;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int t;
+
+    cin >> t;
+
+    while (t--) {
+        int n;
+
+        cin >> n;
+
+        std::vector<std::tuple<int, int, int>> data(n);
+        std::vector<int> nums;
+
+        for (auto& e : data) {
+            int a, b, d;
+
+            cin >> a >> b >> d;
+
+            e = std::make_tuple(a, b, d);
+            nums.emplace_back(a);
+            nums.emplace_back(b);
+        }
+
+        std::sort(nums.begin(), nums.end());
+        nums.erase(std::unique(nums.begin(), nums.end()), nums.end());
+
+        for (auto& e : data) {
+            std::get<0>(e) = std::lower_bound(nums.begin(), nums.end(), std::get<0>(e)) - nums.begin() + 1;
+            std::get<1>(e) = std::lower_bound(nums.begin(), nums.end(), std::get<1>(e)) - nums.begin() + 1;
+        }
+
+        int m = nums.size();
+        std::array<std::array<int, N << 1>, N << 1> f;
+
+        for (int len = 0; len < m; len++) {
+            for (int l = 1, r = 1 + len; r <= m; l++, r++) {
+                auto it = data.end();
+
+                for (auto _it = data.begin(); _it != data.end(); _it++) {
+                    int a, b, d;
+                    std::tie(a, b, d) = *_it;
+
+                    if (l <= a && b <= r && (it == data.end() || d > std::get<2>(*it))) {
+                        it = _it;
+                    }
+                }
+
+                if (it == data.end()) {
+                    f[l][r] = 0;
+                } else {
+                    f[l][r] = std::numeric_limits<int>::max();
+
+                    int a, b, d;
+                    std::tie(a, b, d) = *it;
+
+                    for (int i = a; i <= b; i++) {
+                        f[l][r] = std::min(f[l][r], f[l][i - 1] + d + f[i + 1][r]);
+                    }
+                }
+            }
+        }
+
+        cout << f[1][m] << endl;
+    }
+
+    return 0;
+}