--- /dev/null
+#!/usr/bin/python3
+
+import sys
+
+TICKS = 96000
+
+in_time = int(sys.stdin.readline())
+h = in_time // (TICKS * 60 * 60)
+in_time -= h * (TICKS * 60 * 60)
+m = in_time // (TICKS * 60)
+in_time -= m * (TICKS * 60)
+s = in_time // TICKS
+in_time -= s * TICKS
+
+print('%02d:%02d:%02d' % (h, m, s))