solutions: 69A

solutions/69A.py

@@ -0,0 +1,20 @@
+n = int(input())
+
+coordinates = [0, 0, 0]
+
+for _ in range(n):
+    x, y, z = [int(d) for d in input().split(' ')]
+
+    coordinates[0] += x
+    coordinates[1] += y
+    coordinates[2] += z
+
+check = True
+for i in coordinates:
+    if i != 0:
+        check = False
+
+if check:
+    print("YES")
+else:
+    print("NO")