feat: usaco

usaco/bronze/simulation/traffic.cc

@@ -0,0 +1,122 @@
+#include <bits/stdc++.h>  // {{{
+
+// https://codeforces.com/blog/entry/96344
+
+#pragma GCC optimize("O2,unroll-loops")
+#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
+
+using namespace std;
+
+using i32 = int32_t;
+using u32 = uint32_t;
+using i64 = int64_t;
+using u64 = uint64_t;
+using f64 = double;
+using f128 = long double;
+
+#if __cplusplus >= 202002L
+template <typename T>
+constexpr T MIN = std::numeric_limits<T>::min();
+
+template <typename T>
+constexpr T MAX = std::numeric_limits<T>::max();
+
+template <typename T>
+[[nodiscard]] static T sc(auto&& x) {
+  return static_cast<T>(x);
+}
+
+template <typename T>
+[[nodiscard]] static T sz(auto&& x) {
+  return static_cast<T>(x.size());
+}
+#endif
+
+static void NO() {
+  std::cout << "NO\n";
+}
+
+static void YES() {
+  std::cout << "YES\n";
+}
+
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define ff first
+#define ss second
+
+#ifdef LOCAL
+#define db(...) std::print(__VA_ARGS__)
+#define dbln(...) std::println(__VA_ARGS__)
+#else
+#define db(...)
+#define dbln(...)
+#endif
+//  }}}
+
+void solve() {
+  u32 n;
+  cin >> n;
+
+  string type;
+  i64 l, r;
+  vector<tuple<string, i64, i64>> segments;
+  for (u32 i = 0; i < n; ++i) {
+    cin >> type >> l >> r;
+    segments.emplace_back(type, l, r);
+  }
+
+  i64 lb = 0, ub = 1e9;
+  for (auto it = segments.rbegin(); it != segments.rend(); ++it) {
+    tie(type, l, r) = *it;
+    if (type == "none") {
+      lb = max(lb, l);
+      ub = min(ub, r);
+    } else if (type == "off") {
+      lb += l;
+      ub += r;
+    } else if (type == "on") {
+      lb = max(lb - r, (i64)0);
+      ub = max(ub - l, (i64)0);
+    }
+  }
+  cout << lb << ' ' << ub << '\n';
+
+  lb = 0, ub = 1e9;
+  for (auto& segment : segments) {
+    // NOTE: how does this work?
+    tie(type, l, r) = segment;
+    if (type == "none") {
+      lb = max(lb, l);
+      ub = min(ub, r);
+    } else if (type == "off") {
+      lb = max(lb - r, (i64)0);
+      ub = max(ub - l, (i64)0);
+    } else if (type == "on") {
+      lb += l;
+      ub += r;
+    }
+  }
+
+  cout << lb << ' ' << ub << '\n';
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+  cin.exceptions(cin.failbit);
+
+#define PROBLEM_NAME "traffic"
+
+#ifdef LOCAL
+  freopen("io/" PROBLEM_NAME ".in", "r", stdin);
+  freopen("io/" PROBLEM_NAME ".out", "w", stdout);
+#else
+  freopen(PROBLEM_NAME ".in", "r", stdin);
+  freopen(PROBLEM_NAME ".out", "w", stdout);
+#endif
+
+  solve();
+
+  return 0;
+}
+// }}}