diff --git a/day25.py b/day25.py
new file mode 100644
index 0000000..113e981
--- /dev/null
+++ b/day25.py
@@ -0,0 +1,58 @@
+from tools.aoc import AOCDay
+from typing import Any
+
+
+def int2snafu(dec: int) -> str:
+    conv = "012=-0"
+    snafu = ""
+    power = 1
+    over = 0
+    while dec > 0:
+        c = dec % (5 ** power) + over
+        dec //= 5
+        if c > 2:
+            over = 1
+        else:
+            over = 0
+
+        snafu = conv[c] + snafu
+
+    return snafu
+
+
+def snafu2int(snafu: str) -> int:
+    dec = 0
+    for i, c in enumerate(snafu):
+        if c == '-':
+            val = -1
+        elif c == '=':
+            val = -2
+        else:
+            val = int(c)
+
+        dec += 5 ** (len(snafu) - i - 1) * val
+
+    return dec
+
+
+class Day(AOCDay):
+    inputs = [
+        [
+            ("2=-1=0", "input25_test"),
+            ("2==221=-002=0-02-000", "input25"),
+        ],
+        [
+            (None, "input25"),
+        ]
+    ]
+
+    def part1(self) -> Any:
+        return int2snafu(sum(snafu2int(c) for c in self.getInput()))
+
+    def part2(self) -> Any:
+        return ""
+
+
+if __name__ == '__main__':
+    day = Day(2022, 25)
+    day.run(verbose=True)
diff --git a/inputs/input25 b/inputs/input25
new file mode 100644
index 0000000..fae5f5b
--- /dev/null
+++ b/inputs/input25
@@ -0,0 +1,101 @@
+22-00====1
+1210=012020-1=
+2=-221
+1=020
+1=2=0==12----=-
+1===-22-=
+101120212112-
+2022-==20-=-12===2
+1=20-200=22-1-1-2=
+1-20021=21-
+11--0-==0-1-22
+2--0=---2=-
+21=--=-01=-0=112-21
+2=0200
+1011021--0-=-10010
+2=1=122-22=1---2
+110-0--0
+200
+1=2
+1==11=101-=-000=0==2
+1200-022-=
+1--0=02-2=21220022
+10--
+10===202=22=00=1
+11022
+1--222--
+100
+2-0
+1=221==
+1==21=22
+2==0-=2
+1==1=21=201-
+12-0=1110-1=02-022
+2-12=21=--0020=
+10-1-0=0=01=0--=2--
+2=1==-001=0=12
+212=10002
+10-=02200202=2==
+1-21-0=-10
+1-=12222112
+1=1--12220=1
+10-
+1=-02
+1=210
+21==1=
+1--==--11
+1--21212-=--200-0-
+1000010
+202=012-11-100200
+2=-21202200-=
+11=1112=1020111
+12=1002022-0
+1122
+1=-0-
+1=1=20=0010-
+12=2-0000---
+1-
+2-2=
+12001==---1
+2---=--=0012121100
+10-10-11=1
+1=112-2=0-0=0--=0
+2=0=212122
+102==21101=-==1
+102
+1=2-2-0000211
+10-120-=00
+2=-02112010111-0-
+1-0=
+112
+1=2=
+11=20
+10-2-01-210
+1-02122-2=-
+1-22==0===0-0
+10=--=011-
+2101-=1-12
+1==0=0=01
+22110-=0=111
+12---1-10-0-=1
+2-2-=
+1-=101--11=12=
+2-0--02-01=1-10==
+2=--=200=12=110
+12=
+2--=
+20212
+2102-2
+2=202102
+2=1=
+1101011-=1222-
+11
+202
+102=10001=
+101001
+1====11=0=12
+2211001
+11-2-
+1-00
+11=1-1--
+2=
diff --git a/inputs/input25_test b/inputs/input25_test
new file mode 100644
index 0000000..237ef0c
--- /dev/null
+++ b/inputs/input25_test
@@ -0,0 +1,13 @@
+1=-0-2
+12111
+2=0=
+21
+2=01
+111
+20012
+112
+1=-1=
+1-12
+12
+1=
+122
\ No newline at end of file