Add day 17

Author: LiquidFun

2021/17/17.jl

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+x1, x2, y1, y2 = [parse(Int, m.match) for m in eachmatch(r"-?\d+", readline())]
+count = 0
+function simulate(yspeed, xspeed)
+    x, y, maxy = 0, 0, 0
+    while x <= x2 && y >= y1
+        y, x = y + (yspeed -= 1), x + (xspeed -= xspeed > 0)
+        maxy = max(y, maxy)
+        x ∈ x1:x2 && y ∈ y1:y2 && (global count += 1) > 0 && return maxy
+    end
+    return 0
+end
+maximum(simulate(ys, xs) for ys=y1:200, xs=1:x2+1) |> m -> println("$m\n$count")

2021/17/example.ans

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+45
+112

2021/17/example.in

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+target area: x=20..30, y=-10..-5

2021/17/input.ans

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+10296
+2371

2021/17/input.in

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+target area: x=96..125, y=-144..-98