glacier ctf 25

2025/glacier/misc/best_food/flag.txt

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+gctf{FAKE_FAKE_FAKE_FAKE_FAKE_FAKE}

2025/glacier/misc/best_food/main.rs

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+/// Compute the mean latitude/longitude (center) of a set of coordinates.
+pub fn mean_center(coords: &[(f64, f64)]) -> Option<(f64, f64)> {
+    if coords.is_empty() {
+        return None;
+    }
+    let (mut sum_lat, mut sum_lon) = (0.0, 0.0);
+    for &(lat, lon) in coords {
+        sum_lat += lat;
+        sum_lon += lon;
+    }
+    Some((sum_lat / coords.len() as f64, sum_lon / coords.len() as f64))
+}
+
+fn get_center_point(amenity: &str) -> Option<(f64, f64)> {
+    // TODO: Get POI's and finde center point.
+    unimplemented!();
+
+    return mean_center(nodes);
+}
+
+fn calc_final_point(
+    a: (f64, f64, f64),
+    b: (f64, f64, f64),
+    c: (f64, f64, f64),
+) -> Option<(f64, f64)> {
+    // TODO: Calculate hidden place coords.
+    unimplemented!();
+}
+
+fn main() {
+    let (lat_a, lon_a) = get_center_point("bar").unwrap();
+    let (lat_b, lon_b) = get_center_point("atm").unwrap();
+    let (lat_c, lon_c) = get_center_point("taxi").unwrap();
+
+    let secret_hideout = calc_final_point(
+        // (lat, lon, dis)
+        (lat_a, lon_a, 0.6412652119499),
+        (lat_b, lon_b, 0.2822972577454),
+        (lat_c, lon_c, 0.9572772921063),
+    )
+    .unwrap();
+}

2025/glacier/misc/best_food/sha256sum

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+624334072551c61994e332e6b069da525dabd206a96b0e0fe96b4bad16e0dd65  ./main.rs
+6cc4e5fb79eb10fefc68aef9a70100f486aabaeeee13ea6e1ed227ce218cc9fe  ./flag.txt

2025/glacier/misc/rfc1035/decode.py

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+import codecs
+
+with open("./pic.txt", "rb") as f:
+    data = f.read().strip()
+
+binary_data = codecs.decode(data, 'unicode-escape').encode('latin1')
+
+with open("pic.png", "wb") as f:
+    f.write(binary_data)
+
+
+

2025/glacier/misc/rfc1035/sha256sum

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+7ade19dfaccf17665b67c23b1f47d2738a21fa955f912ed76d276af475f0e7af  ./app