1 files changed, 32 insertions, 0 deletions
diff --git a/codeforces/doubleStrings/main.cpp b/codeforces/doubleStrings/main.cpp
new file mode 100644
index 0000000..532a4c5
--- /dev/null
+++ b/codeforces/doubleStrings/main.cpp
@@ -0,0 +1,32 @@
+#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;
+    cin >> n;
+    vector<string> v(n);
+    for (auto &x : v)
+      cin >> x;
+    set<string> st(v.begin(), v.end());
+    string ans = "";
+    for (int i = 0; i < n; i++) {
+      int len = v[i].size();
+      bool ok = false;
+      for (int j = 0; j < len; j++) {
+        string prefix = v[i].substr(0, j + 1);
+        if (st.find(prefix) != st.end()) {
+          string suff = v[i].substr(j + 1);
+          ok = ok || st.find(suff) != st.end();
+        }
+      }
+      ans += ('0' + ok);
+    }
+    cout << ans << endl;
+  }
+}