1 files changed, 31 insertions, 0 deletions
diff --git a/codeforces/MarkThePhotographer/main.cpp b/codeforces/MarkThePhotographer/main.cpp
new file mode 100644
index 0000000..15c4e29
--- /dev/null
+++ b/codeforces/MarkThePhotographer/main.cpp
@@ -0,0 +1,31 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+  int tt;
+  cin >> tt;
+  while (tt--) {
+    int n, y;
+    cin >> n >> y;
+    vector<int> v(2 * n);
+    int ans = 0;
+    for (int &x : v)
+      cin >> x;
+    sort(v.begin(), v.end());
+    for (int i = 0; i < n; i++) {
+      int x = v[i];
+      int z = v[i + n];
+      if (z - x >= y) {
+        ans++;
+      }
+    }
+    if (ans == n) {
+      cout << "YES" << '\n';
+    } else {
+      cout << "NO" << '\n';
+    }
+  }
+}