1 files changed, 25 insertions, 0 deletions
diff --git a/contests/21-04-2022(Div.4)/E.cpp b/contests/21-04-2022(Div.4)/E.cpp
new file mode 100644
index 0000000..7fac1a5
--- /dev/null
+++ b/contests/21-04-2022(Div.4)/E.cpp
@@ -0,0 +1,25 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+int main(){
+  int tt, n, count;
+  cin >> tt;
+  while(tt--){
+    string str;
+    cin >> n;
+    count = 0;
+    vector<string> v(n);
+    for(int i = 0; i < n; i++){
+      cin >> v[i];
+    }
+    for(int i = 0; i < v.size(); i++){
+      for(int j = i+1; j < v.size()-1; j++){
+        if(v[i][0] != v[j][0] || v[i][1] != v[j][1]){
+          count++;
+        }
+      }
+    }
+    cout << count << endl;
+  }
+}