My solutions for CTFs
Daily AlpacaHack 2025/12/18
Takumi Akimoto
(Dec 19, 2025, 12:01 AM +0900)
c787d0fc
b82ee9a4
+53
+48
alpacahack/daily/twilight/solve.ts
+48
alpacahack/daily/twilight/solve.ts
···
1
+
const outputs = [
2
+
0x41,
3
+
0x6D,
4
+
0x72,
5
+
0x62,
6
+
0x67,
7
+
0x64,
8
+
0x81,
9
+
0x46,
10
+
0x74,
11
+
0x79,
12
+
0x6B,
13
+
0x68,
14
+
0x6D,
15
+
0x45,
16
+
0x6F,
17
+
0x6C,
18
+
0x7B,
19
+
0x4E,
20
+
0x7B,
21
+
0x7D,
22
+
0x73,
23
+
0x42,
24
+
0x85,
25
+
0x79,
26
+
0x7C,
27
+
0x7C,
28
+
0x8C,
29
+
0x77,
30
+
0x7D,
31
+
0x73,
32
+
0x82,
33
+
0x62,
34
+
]
35
+
36
+
let flag = ""
37
+
38
+
for (let i = 0; i < outputs.length; i++) {
39
+
let charCode = outputs[i] - i
40
+
41
+
if (i % 2 === 1) {
42
+
charCode = outputs[i] ^ i
43
+
}
44
+
45
+
flag += String.fromCharCode(charCode & 0xff)
46
+
}
47
+
48
+
console.log(flag)