Added 268A - Games.cpp

Author: vikashpatel24

268A - Games.cpp

@@ -0,0 +1,44 @@
+//                                 ॐ नमः शिवाय
+#include<bits/stdc++.h>
+using namespace std;
+
+#define ll long long
+#define pb push_back
+#define ff first
+#define ss second
+#define mp make_pair
+ 
+// Code Written By: Vikash Patel
+// Codeforces Profile: https://codeforces.com/profile/vikashpatel
+
+int main()
+{
+    ios_base::sync_with_stdio(0);
+    cin.tie(0);
+    cout.tie(0);
+    
+    // #ifndef ONLINE_JUDGE
+    // freopen("input.txt", "r", stdin);
+    // freopen("/Users/vikash/Desktop/output.txt", "w", stdout);
+    // #endif
+    
+    int n;
+    cin>>n;
+    map<int,int>mp;
+    int guest[n];
+    for(int i=0; i<n; i++)
+    {
+        int h,a;
+        cin>>h>>a;
+        mp[h]++;
+        guest[i] = a;
+    }
+    int ans = 0;
+    for(int i=0; i<n; i++)
+    {
+        ans+=mp[guest[i]];
+    }
+    cout<<ans<<endl;
+    
+    return 0;
+}