Adds fcsc 2025 and scale 22x

content/writeups/2025/fcsc/hardware/mechanical_display/solve.py

@@ -0,0 +1,29 @@
+#!/usr/bin/python3
+
+def closest_number(target):
+    numbers = list(range(60, 241, 10))
+    target += 2
+    closest = min(numbers, key=lambda x: abs(x - target))
+    return closest
+
+if __name__ == "__main__":
+
+    flag = ""
+    values = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'F', 'S', '{', '}', '_']
+
+    with open('mechanical-display.vcd', 'r') as file:
+        data = [line.strip() for line in file][11:]
+
+    last = -1
+    first = data[1].split()[0][1:]
+    second = data[2].split()[0][1:]
+    for i in range(3, len(data) - 1, 2):
+        first = data[i].split()[0][1:]
+        second = data[i+1].split()[0][1:]
+        diff = int(second) - int(first)
+        if (diff - 7) > last or (diff + 7) < last:
+            last = diff
+            val = closest_number(diff)
+            char = str(values[int(val/10 - 6)])
+            flag += char
+    print(flag)