5 files changed, 219 insertions, 0 deletions
diff --git a/contests/Round896/B/main.cpp b/contests/Round896/B/main.cpp
new file mode 100755
index 0000000..e029c65
--- /dev/null
+++ b/contests/Round896/B/main.cpp
@@ -0,0 +1,176 @@
+#include <bits/stdc++.h>
+#include <climits>
+using namespace std;
+
+using ll = long long;
+using pii = pair<int, int>;
+using vpi = vector<pii>;
+using vi = vector<int>;
+using vll = vector<long long>;
+using mpii = map<int, int>;
+using mpll = map<ll, ll>;
+using db = long double;
+
+#define pb push_back
+#define all(x) (x).begin(), (x).end()
+#define rall(x) (x).rbegin(), (x).rend()
+#define lb lower_bound
+#define ub upper_bound
+#define make_unique(x)                                                         \
+  sort(all((x)));                                                              \
+  (x).resize(unique(all((x))) - (x).begin())
+#define ceil(a, b) ((a) + (b)-1) / (b)
+
+const int MOD = (int)1e9 + 7;
+const db PI = acos((db)-1);
+const int dx[4]{1, 0, -1, 0};
+const int dy[4]{0, 1, 0, -1};
+
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const pair<K, V> &p);
+template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec);
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const map<K, V> &m);
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const unordered_map<K, V> &m);
+template <typename T> ostream &operator<<(ostream &os, const set<T> &s);
+template <typename T>
+ostream &operator<<(ostream &os, const unordered_set<T> &s);
+
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const pair<K, V> &p) {
+  os << "(" << p.first << ", " << p.second << ")";
+  return os;
+}
+
+template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) {
+  os << "{";
+  for (size_t i = 0; i < vec.size(); ++i) {
+    if (i > 0)
+      os << ", ";
+    os << vec[i];
+  }
+  os << "}";
+  return os;
+}
+
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const map<K, V> &m) {
+  os << "{";
+  for (const auto &p : m) {
+    os << p.first << ": " << p.second << ", ";
+  }
+  os << "}";
+  return os;
+}
+
+template <typename K, typename V>
+ostream &operator<<(ostream &os, const unordered_map<K, V> &m) {
+  os << "{";
+  for (const auto &p : m) {
+    os << p.first << ": " << p.second << ", ";
+  }
+  os << "}";
+  return os;
+}
+
+template <typename T> ostream &operator<<(ostream &os, const set<T> &s) {
+  int i = 0;
+  os << "{";
+  for (const auto &e : s) {
+    if (i > 0)
+      os << ", ";
+    os << e;
+    i++;
+  }
+  os << "}";
+  return os;
+}
+
+template <typename T>
+ostream &operator<<(ostream &os, const unordered_set<T> &s) {
+  int i = 0;
+  os << "{";
+  for (const auto &e : s) {
+    if (i > 0)
+      os << ", ";
+    os << e;
+    i++;
+  }
+  os << "}";
+  return os;
+}
+
+void dbg() { cerr << "\n"; }
+
+template <typename T, typename... TS> void dbg(T val, TS... vals) {
+  cerr << val << " ";
+  dbg(vals...);
+}
+
+/* stuff you should look for:
+  ---------------------------
+   * special cases (n=1?)
+   * int overflow, array bounds
+   * do smth instead of nothing and stay organized
+   * WRITE STUFF DOWN
+   * DON'T GET STUCK ON ONE APPROACH
+ */
+
+// (-1, 3) -> (-3, -3) = 2 + 6 = 8
+// (-1, 3) -> (-2, 3) -> (-3, -3) = 1 + 0 + 1 + 6 = 8
+
+void solve() {
+  int n, k, a, b;
+  cin >> n >> k >> a >> b;
+  vector<vector<ll>> v(n, vector<ll>(2));
+  for (int i = 0; i < n; i++) {
+    cin >> v[i][0] >> v[i][1];
+  }
+  if (a <= k && b <= k) {
+    cout << 0 << '\n';
+    return;
+  }
+  a--;
+  b--;
+  int idx_e = 0;
+  ll mn_end = INT_MAX;
+  for (int i = 0; i < n; i++) {
+    if (i != b && mn_end > abs(v[b][0] - v[i][0]) + abs(v[b][1] - v[i][1])) {
+      idx_e = i;
+      mn_end = min(mn_end, abs(v[b][0] - v[i][0]) + abs(v[b][1] - v[i][1]));
+    }
+  }
+  int idx_a = 0;
+  ll mn = INT_MAX;
+  for (int i = 0; i < k; i++) {
+    if (i != idx_e &&
+        mn > abs(v[idx_e][0] - v[i][0]) + abs(v[idx_e][1] - v[i][1])) {
+      idx_a = i;
+      mn = min(mn, abs(v[idx_e][0] - v[i][0]) + abs(v[idx_e][1] - v[i][1]));
+    }
+  }
+  ll ans = 0;
+  if (idx_a + 1 <= k && idx_e + 1 <= k) {
+    if (idx_a + 1 > k || a + 1 > k) {
+      ans += abs(v[idx_a][0] - v[a][0]) + abs(v[idx_a][1] - v[a][1]);
+    }
+  } else {
+    ans += abs(v[a][0] - v[idx_e][0]) + abs(v[a][1] - v[idx_e][1]);
+  }
+
+  if (idx_e + 1 > k || b + 1 > k) {
+    ans += abs(v[b][0] - v[idx_e][0]) + abs(v[b][1] - v[idx_e][1]);
+  }
+  cout << ans << '\n';
+}
+
+int main() {
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+  int tt;
+  cin >> tt;
+  while (tt--) {
+    solve();
+  }
+}
diff --git a/contests/Round896/B/main_input0.txt b/contests/Round896/B/main_input0.txt
new file mode 100644
index 0000000..e71b84a
--- /dev/null
+++ b/contests/Round896/B/main_input0.txt
@@ -0,0 +1,28 @@
+5
+6 2 3 5
+0 0
+1 -2
+-2 1
+-1 3
+2 -2
+-3 -3
+2 0 1 2
+-1000000000 -1000000000
+1000000000 1000000000
+7 5 4 2
+154 147
+-154 -147
+123 456
+20 23
+43 20
+998 244
+353 100
+3 1 3 1
+0 10
+1 20
+2 30
+4 3 2 4
+0 0
+-100 100
+-1 -1
+-1 0
diff --git a/contests/Round896/B/main_input1.txt b/contests/Round896/B/main_input1.txt
new file mode 100644
index 0000000..551cc43
--- /dev/null
+++ b/contests/Round896/B/main_input1.txt
@@ -0,0 +1,9 @@
+1
+7 2 3 5
+0 0
+1 -2
+-2 1
+-1 3
+1 -2
+2 -2
+-3 -3
+\ No newline at end of file
diff --git a/contests/Round896/B/main_output0.txt b/contests/Round896/B/main_output0.txt
new file mode 100644
index 0000000..d434c75
--- /dev/null
+++ b/contests/Round896/B/main_output0.txt
@@ -0,0 +1,5 @@
+4
+4000000000
+0
+22
+1
diff --git a/contests/Round896/B/main_output1.txt b/contests/Round896/B/main_output1.txt
new file mode 100644
index 0000000..56a6051
--- /dev/null
+++ b/contests/Round896/B/main_output1.txt
@@ -0,0 +1 @@
+1
+\ No newline at end of file