codeforces: 1003

codeforces/957/d.cc

@@ -0,0 +1,119 @@
+#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;
+
+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());
+}
+
+template <typename... Args>
+void pr(std::format_string<Args...> fmt, Args&&... args) {
+  std::print(fmt, std::forward<Args>(args)...);
+}
+
+template <typename... Args>
+void pr(std::format_string<Args...> fmt) {
+  std::print(fmt);
+}
+
+template <typename... Args>
+void prln(std::format_string<Args...> fmt, Args&&... args) {
+  std::println(fmt, std::forward<Args>(args)...);
+}
+
+template <typename... Args>
+void prln(std::format_string<Args...> fmt) {
+  std::println(fmt);
+}
+
+using ll = long long;
+using ld = long double;
+template <typename T>
+using vec = std::vector<T>;
+
+#define ff first
+#define ss second
+#define eb emplace_back
+#define pb push_back
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+
+#define FORI(a, b, c) for (int a = (b); a < (c); ++a)
+#define ROFI(a, b, c) for (int a = (b); a > (c); --a)
+#define FORLL(a, b, c) for (ll a = (b); a < (c); ++a)
+#define ROFLL(a, b, c) for (ll a = (b); a > (c); --a)  // }}}
+
+void solve() {
+  int _, jump, swim;
+  cin >> _ >> jump >> swim;
+  string s;
+  cin >> s;
+
+  int get_to = 0;
+  vec<int> logs;
+  FORI(i, 0, sz<int>(s)) {
+    if (s[i] == 'L')
+      logs.pb(i);
+  }
+
+  logs.pb(sz<int>(s) + 1);
+
+  int pos = -1;
+  bool done = true;
+  while (pos < sz<int>(s)) {
+    auto diff = logs[get_to] - pos;
+    if (jump < diff) {
+      if ((pos += jump) < sz<int>(s)) {
+        while (pos < sz<int>(s) && pos < logs[get_to]) {
+          if (s[pos] == 'C' || swim == 0) {
+            done = false;
+            break;
+          }
+          ++pos;
+          --swim;
+        }
+        if (!done)
+          break;
+      } else
+        break;
+    } else {
+      pos = logs[get_to];
+    }
+    ++get_to;
+  }
+
+  if (done)
+    prln("YES");
+  else
+    prln("NO");
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+
+  int t = 1;
+  cin >> t;
+
+  while (t--) {
+    solve();
+  }
+
+  return 0;
+}  //}}}