---
# System prepended metadata

title: h1 CTF資安研究社 RE

---

# h1 CTF資安研究社 RE
1.Find FLAG{Y0U_gOt_th3_flag_bY_sTr1ngS}
2.add flag{y0u_added_thr33_nums!}

v7 = input("who's there")
v9=0
for 
   v3=v7 > 64 & v7 < 90
   if v3
	{
	   v4 = v7
	   v9=v4 -65 +26 *v9
	}
   if (v9 == 63075521699681049)
   
v9=ord(v7[i])-65+26*v9逆推