SP4033 PHONELST - Phone List

R58061037

Luogu/problem/SP4033/SP4033.cpp

@@ -0,0 +1,27 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int t, n;
+bool flag;
+string s[10005];
+
+int main() {
+    cin >> t;
+    while (t--) {
+        flag = false;
+        cin >> n;
+        for (int i = 0; i < n; i++) {
+            cin >> s[i];
+        }
+        sort(s, s + n);
+        for (int i = 0; i < n - 1; i++) {
+            if (s[i + 1].substr(0, s[i].size()) == s[i]) {
+                flag = true;
+                break;
+            }
+        }
+        cout << (flag ? "NO" : "YES") << endl;
+    }
+    return 0;
+}