Started on 226th beginner contest of atcoder.jp, a and b finished

atcoder/beginner_contests/226/b.cpp

@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+typedef long long ll;
+
+int main(){
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+
+    int n;
+    cin >> n;
+    set<vector<ll>> seqs;
+
+    for(int i = 0; i < n; ++i){
+        int l;
+        cin >> l;
+
+        vector<ll> seq(l); 
+        for(int j = 0; j < l; ++j){
+            cin >> seq[j];
+        }
+
+        seqs.insert(seq);
+    }
+
+    cout << seqs.size();
+
+    cout << flush;
+
+    return 0;
+}