feat(cses): a few problems

cses/two-knights/.clang-format

@@ -0,0 +1,9 @@
+BasedOnStyle: Google
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortCompoundRequirementOnASingleLine: false
+AllowShortEnumsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: false
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLambdasOnASingleLine: false
+AllowShortLoopsOnASingleLine: false

cses/two-knights/.clangd

@@ -0,0 +1,8 @@
+CompileFlags:
+	Add:
+		- -Wall
+		- -Wextra
+		- -Wpedantic
+		- -Wshadow
+		- -DLOCAL
+		- -Wno-unknown-pragmas

cses/two-knights/compile_flags.txt

@@ -0,0 +1,5 @@
+-Wall
+-Wextra
+-Wpedantic
+-Wshadow
+-DLOCAL

cses/two-knights/solution.cc

@@ -0,0 +1,58 @@
+#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());
+}
+
+using ll = long long;
+using ld = long double;
+template <typename T>
+using vec = std::vector<T>;
+template <typename T, size_t N>
+using arr = std::array<T, N>;
+
+#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()
+//  }}}
+
+void solve() {
+  int n;
+  cin >> n;
+  for (ll i = 1; i <= n; ++i) {
+    ll ans = (i * i) * (i * i - 1) / 2;
+    ans -= 2 * 2 * (i - 1) * (i - 2);
+    cout << ans << endl;
+  }
+}
+
+int main() {  // {{{
+  cin.tie(nullptr)->sync_with_stdio(false);
+
+  solve();
+
+  return 0;
+}
+// }}}

cses/two-knights/solution.in

@@ -0,0 +1 @@
+8

cses/two-knights/solution.out

@@ -0,0 +1,11 @@
+0
+6
+28
+96
+252
+550
+1056
+1848
+
+[code]: 0
+[time]: 4.07505 ms