69A

Author: anasjawed283

Physist.cpp

@@ -0,0 +1,23 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+    int n, x, y, z, xsum(0), ysum(0), zsum(0);
+    cin >> n;
+    while (n--)
+    {
+        cin >> x >> y >> z;
+        xsum += x;
+        ysum += y;
+        zsum += z;
+    }
+    if (xsum == 0 && ysum == 0 && zsum == 0)
+    {
+        cout << "YES" << endl;
+    }
+    else
+    {
+        cout << "NO" << endl;
+    }
+    return 0;
+}