feat: usaco

usaco/bronze/rut.cc

@@ -0,0 +1,112 @@
+#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;
+
+template <typename T>
+constexpr T MIN = std::numeric_limits<T>::min();
+
+template <typename T>
+constexpr T MAX = std::numeric_limits<T>::max();
+
+#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
+//  }}}
+
+struct Cow {
+  u32 i;
+  i64 x, y;
+};
+
+void solve() {
+  u32 n;
+  cin >> n;
+
+  vector<Cow> east_cows, north_cows;
+  vector<i64> ans(n, -1);
+
+  char dir;
+  i64 x, y;
+  for (u32 i = 0; i < n; ++i) {
+    cin >> dir >> x >> y;
+
+    Cow cow{i, x, y};
+    if (dir == 'E') {
+      east_cows.emplace_back(cow);
+    } else {
+      north_cows.emplace_back(cow);
+    }
+  }
+
+  sort(all(east_cows), [](auto const& c1, auto const& c2) {
+    return c1.y < c2.y;
+  });
+  sort(all(north_cows), [](auto const& c1, auto const& c2) {
+    return c1.x < c2.x;
+  });
+
+  for (auto& nc : north_cows) {
+    for (auto& ec : east_cows) {
+      if (ec.x > nc.x || nc.y >= ec.y || ans[ec.i] != -1)
+        continue;
+
+      auto et = nc.x - ec.x;
+      auto nt = ec.y - nc.y;
+
+      if (nt < et) {
+        ans[ec.i] = et;
+      }
+      if (et < nt) {
+        ans[nc.i] = nt;
+        break;
+      }
+    }
+  }
+
+  for (auto& e : ans) {
+    if (e == -1) {
+      cout << "Infinity";
+    } else {
+      cout << e;
+    }
+    cout << '\n';
+  }
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+  cin.exceptions(cin.failbit);
+
+#define PROBLEM_NAME "rut"
+
+#ifdef LOCAL
+  freopen("io/" PROBLEM_NAME ".in", "r", stdin);
+  freopen("io/" PROBLEM_NAME ".out", "w", stdout);
+#endif
+
+  solve();
+
+  return 0;
+}
+// }}}