[Init] Solved solutions

cpp/467A.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+
+using namespace std;
+
+int main()
+{
+    int n;
+    cin >> n;
+    int sum = 0;
+    while (n--)
+    {
+        int p, q;
+        cin >> p >> q;
+        if (q - p >= 2)
+        {
+            sum++;
+        }
+    }
+    cout << sum;
+    return 0;
+}