Build a skyline from a different view. Fill every row and column with heights 1 to N, without repeats. Edge numbers count towers visible from that side. Taller towers hide shorter towers behind them. For example, 2, 1, 4, 3 shows two towers from the left: 2 and 4. GEMDUCK LIMITED. Free to install on Android. Contains ads. See Google Play for current release details and optional purchases.