diff --git a/day18.py b/day18.py
new file mode 100644
index 0000000..15eb0e2
--- /dev/null
+++ b/day18.py
@@ -0,0 +1,172 @@
+import math
+import sys
+
+def check_nested(inp):
+    peg_counter = 0
+    found = False
+    found2 = False
+    pair = ''
+    high_peg = None
+    for i in range(len(inp)):
+        if inp[i] == '[':
+            peg_counter += 1
+            if peg_counter > 4:
+                found = True
+                high_peg = peg_counter
+                pair = ''
+                start = i
+        if inp[i] == ']':
+            peg_counter -= 1
+
+        if found:
+            pair += inp[i]
+        if found and peg_counter == high_peg - 1:
+            end = i
+            found2 = True
+            break
+    if found2:
+        #print('Exploding ', pair)
+        pair = pair[1:-1]
+        left, rigth = pair.split(',')
+        tempnum = ''
+        digit_check = False
+        for i in range(end, len(inp)):
+            if inp[i].isdigit():
+                digit_check = True
+                digit_start = i
+                tempnum += inp[i]
+                #print('tempnum: ', tempnum)
+            if (inp[i] == ',' or inp[i] == ']') and digit_check:
+                # print('Replacing ', inp[i - len(tempnum):i], ' with ', str(int(tempnum) + int(rigth)), ' (', str(tempnum), ' + ' , str(rigth) + ')')
+                inp = inp[:i - len(tempnum)] + str(int(tempnum) + int(rigth)) + inp[i:]
+                break
+        # print('Replacing ', inp[start:end+1], ' with zero')
+        # print('B: ', inp)
+        inp = inp[:start] + '0' + inp[end + 1:]
+        # print('A: ', inp)
+        tempnum = ''
+        digit_check = False
+        for i in range(start - 1, 0, -1):
+            if inp[i].isdigit():
+                digit_check = True
+                digit_start = i
+                tempnum = inp[i] + tempnum
+            if (inp[i] == ',' or inp[i] == '[' ) and digit_check:
+                # print('Replacing ', inp[i+1:i+len(tempnum)+1], ' with ', str(int(tempnum) + int(left)))
+                inp = inp[:i + 1] + str(int(tempnum) + int(left)) + inp[len(tempnum) + i + 1:]
+                break
+                
+    # print(inp)
+    
+    return (inp, found2)
+
+def check_split(inp):
+    checkmarker = 0
+    found = False
+    for i in range(len(inp)):
+        if inp[i].isdigit():
+                checkmarker += 1
+        else:
+            checkmarker = 0
+        if checkmarker == 2:
+            number_pos = i
+            number = int(inp[i-1] + inp[i])
+            number = number/2
+            found = True
+            break
+    if found:    
+        new_pair = '[' + str(math.trunc(number)) + ',' + str(math.ceil(number)) + ']'
+        #print('Replacing ', inp[number_pos - 1:number_pos+1], ' with ', new_pair)
+        inp = inp[:number_pos - 1] + new_pair + inp[number_pos + 1:]
+    #print(inp)
+    return (inp, found)
+
+def magnitude(inp):
+    found = False
+    number = ''
+    start = None
+    end = None
+    for i in range(len(inp)):
+        if inp[i] == '[':
+            start = i
+        if inp[i] == ']':
+            end = i
+            break
+    if start is None:
+        start = 0
+    if end is None:
+        end = len(inp)
+    for i in range(start, end):
+        number += inp[i]
+    if ',' in number:
+        found = True
+        left, rigth = number.split(',')
+        left = left[1:]
+        number = str(int(left)*3 + int(rigth)*2)
+        inp = inp[:start] + number + inp[end + 1:]
+    else:
+        inp = number
+    return (inp, found)
+
+def reduct(inp):
+    reduction = True
+    while reduction:
+        eplode = True
+        split = True
+        while eplode:
+            inp, eplode = check_nested(inp)
+            reduction = False
+        
+        inp, split = check_split(inp)
+        if split:
+            reduction = True
+    return(inp)
+    
+
+inp = []
+
+with open(sys.argv[1], 'r') as f:
+    for g in f.readlines():
+        g = g.strip()
+        inp.append(g)
+
+if sys.argv[2] == 'part1':
+    imp = inp[0]
+    inp.pop(0)
+
+    while len(inp) > 0:
+        print('___________________')
+        print(imp)
+        print('+', inp[0])
+        imp = '[' + imp + ',' + inp[0] + ']'
+        inp.pop(0)
+        imp = reduct(imp)
+        print('=', imp)
+        print('___________________')
+
+
+
+
+    done_check = True
+
+    while done_check:
+        imp, done_check = magnitude(imp)
+
+    print(imp, done_check)
+
+if sys.argv[2] == 'part2':
+    high_mag = 0
+
+    for i in inp:
+        for f in inp:
+            if f != i:
+                imp = '[' + i + ',' + f + ']'
+                imp = reduct(imp)
+                done_check = True
+                while done_check:
+                    imp, done_check = magnitude(imp)
+                if int(imp) > high_mag:
+                    high_mag = int(imp)
+    
+    print(high_mag)
+
diff --git a/input18.txt b/input18.txt
new file mode 100644
index 0000000..73719bd
--- /dev/null
+++ b/input18.txt
@@ -0,0 +1,100 @@
+[[[3,[8,6]],[6,1]],[[[1,1],2],[[1,0],0]]]
+[[[1,[7,3]],1],9]
+[[[2,6],[[3,1],[0,9]]],[[7,[4,8]],[[2,7],3]]]
+[[[3,[0,4]],[[8,4],[1,9]]],[7,[2,[5,7]]]]
+[[[4,5],[[0,7],1]],[9,[0,4]]]
+[[5,[[1,5],[3,6]]],8]
+[[3,[[9,3],9]],9]
+[2,[[[2,1],[0,5]],[9,9]]]
+[[2,[6,9]],[[[4,1],0],[3,4]]]
+[[[[6,8],0],[[8,8],9]],[[[4,2],3],[3,[7,3]]]]
+[[3,7],9]
+[[[[2,5],8],[2,5]],[[0,[5,7]],[[2,5],4]]]
+[[[8,[6,6]],0],[4,[[5,6],[8,4]]]]
+[[[1,[8,2]],[[0,4],[2,6]]],[[3,4],0]]
+[[1,[[9,2],[6,0]]],[[[0,9],5],[[8,0],[1,5]]]]
+[[2,[[2,3],[1,8]]],[3,[[7,2],[0,7]]]]
+[[5,4],5]
+[[[[4,2],[4,8]],[7,3]],[0,[[8,9],6]]]
+[[[6,7],0],5]
+[[2,[[9,0],[8,4]]],[[[7,4],[3,4]],0]]
+[[[9,[8,9]],1],[[5,[6,7]],3]]
+[[2,[0,0]],[3,[[2,5],[1,4]]]]
+[[0,1],[0,[[8,8],[8,3]]]]
+[[[0,2],[2,8]],[1,[[7,0],0]]]
+[[[[5,4],3],[[7,5],[2,6]]],[[5,8],[0,1]]]
+[0,[0,0]]
+[[5,[[5,6],0]],[[[2,7],9],[7,9]]]
+[[[[0,8],2],[[2,5],[7,6]]],[[9,7],[[8,7],[9,2]]]]
+[[[0,[4,6]],[[6,3],[4,4]]],[8,[[4,8],[4,8]]]]
+[[[[8,9],[3,8]],8],[[[7,9],6],[9,[2,7]]]]
+[[[[8,9],[1,6]],0],[[[8,7],4],[9,[1,4]]]]
+[5,7]
+[[[[1,5],[3,6]],[[5,5],4]],[[3,3],[4,[4,0]]]]
+[[[0,6],[5,[5,3]]],[[4,[0,0]],8]]
+[7,[6,8]]
+[[[[8,5],9],[[3,2],7]],[[[6,6],5],2]]
+[[[[4,4],[0,4]],9],0]
+[[0,[3,[9,3]]],[9,[[8,0],[0,9]]]]
+[[[[4,0],0],[1,[1,7]]],[[3,[3,0]],[[1,3],6]]]
+[[9,4],[3,[[7,1],6]]]
+[[[[3,7],7],1],[[4,3],[[6,9],[6,9]]]]
+[[[8,[2,5]],[[8,4],4]],[[[3,4],[6,7]],[5,[8,5]]]]
+[2,[4,[[3,2],7]]]
+[[[[3,1],[5,6]],[[2,7],7]],[4,[8,[7,4]]]]
+[[7,8],[[[3,9],7],2]]
+[[[[8,8],[5,8]],[[1,0],[6,0]]],[[[1,2],6],[[4,2],[5,5]]]]
+[[1,[0,9]],[[[2,1],1],1]]
+[[6,[8,1]],[4,[[7,8],5]]]
+[[[1,[1,6]],[1,[5,7]]],[[[2,8],6],0]]
+[9,1]
+[[[0,[6,5]],[[8,5],2]],[[[2,4],[7,3]],[[1,5],[9,2]]]]
+[[[2,7],[0,[3,6]]],[[[1,0],[9,6]],[1,[0,4]]]]
+[6,[[[5,9],8],[0,2]]]
+[7,[[[9,4],[8,6]],[[1,1],1]]]
+[[[2,1],0],8]
+[1,[[6,[1,4]],[[0,0],[1,9]]]]
+[[[1,[7,9]],2],8]
+[[[[0,9],2],[[8,4],9]],[0,[[7,7],[4,8]]]]
+[[1,[2,[1,8]]],[[[3,6],[2,1]],[3,[5,0]]]]
+[[3,3],[3,5]]
+[[[[9,3],[4,3]],[5,[8,1]]],[[6,[5,0]],9]]
+[0,[[9,[3,5]],3]]
+[[[9,1],0],[[[5,9],[8,0]],[7,[4,8]]]]
+[[[[7,7],8],3],[[[6,6],[6,5]],[6,4]]]
+[[[[3,7],1],[9,[4,2]]],[[9,[2,5]],[[9,0],5]]]
+[5,[[0,2],6]]
+[[[[2,7],[5,3]],[1,8]],2]
+[[[8,[7,7]],[9,[0,0]]],4]
+[[[4,[1,4]],0],[[[8,7],8],[[4,1],7]]]
+[[[[0,6],0],[[3,2],[9,8]]],[[9,[4,5]],[[7,7],[0,8]]]]
+[[[[6,3],3],[[1,5],7]],[[0,1],[7,7]]]
+[[[[2,0],2],[3,[3,5]]],[[[0,8],[8,2]],[[0,6],5]]]
+[[[6,[5,3]],[[5,5],9]],[[5,9],[[8,7],[3,7]]]]
+[[[[1,7],[3,4]],[9,2]],1]
+[[[[8,2],6],1],[[5,[2,7]],[3,9]]]
+[5,[5,7]]
+[[[[9,8],[3,4]],[[2,5],[5,6]]],[[[2,7],7],[9,[8,7]]]]
+[[[1,4],[[6,1],[1,3]]],[1,[7,[1,7]]]]
+[[[[1,4],8],[[5,1],8]],[[[1,3],[6,9]],[6,[3,3]]]]
+[[[[4,0],[0,7]],[4,5]],[4,2]]
+[3,8]
+[7,[[[7,6],5],[[6,6],5]]]
+[[[5,[0,5]],[4,4]],[3,[[4,2],[7,0]]]]
+[[[[7,9],8],[9,6]],[5,0]]
+[[[[3,0],[5,2]],1],[[[6,9],[5,3]],[[2,5],[6,3]]]]
+[7,[[[7,7],[4,5]],[9,2]]]
+[[7,[[4,2],[9,3]]],[7,[6,1]]]
+[7,9]
+[[[8,[8,1]],[[7,3],1]],[[9,8],[2,[8,3]]]]
+[[[9,3],3],3]
+[[[8,[5,7]],[[2,1],[1,3]]],[[[3,5],2],0]]
+[[[8,8],0],[[1,4],[[8,6],9]]]
+[[9,[3,[3,0]]],[1,7]]
+[1,[[[8,8],1],[2,[0,5]]]]
+[[0,[1,5]],[9,[0,[9,0]]]]
+[1,[[[1,1],[8,3]],[1,8]]]
+[[5,[[7,7],[3,3]]],[[[6,6],[7,8]],[1,[0,0]]]]
+[[[[6,7],1],[0,2]],[[[4,2],[7,6]],[[8,4],[4,9]]]]
+[[6,[[3,3],[9,0]]],[1,[[4,5],4]]]
+[[[[3,4],7],[9,0]],[[[4,5],1],[[5,1],[9,3]]]]
diff --git a/testdata18-2.txt b/testdata18-2.txt
new file mode 100644
index 0000000..1368dc4
--- /dev/null
+++ b/testdata18-2.txt
@@ -0,0 +1,10 @@
+[[[0,[5,8]],[[1,7],[9,6]]],[[4,[1,2]],[[1,4],2]]]
+[[[5,[2,8]],4],[5,[[9,9],0]]]
+[6,[[[6,2],[5,6]],[[7,6],[4,7]]]]
+[[[6,[0,7]],[0,9]],[4,[9,[9,0]]]]
+[[[7,[6,4]],[3,[1,3]]],[[[5,5],1],9]]
+[[6,[[7,3],[3,2]]],[[[3,8],[5,7]],4]]
+[[[[5,4],[7,7]],8],[[8,3],8]]
+[[9,3],[[9,9],[6,[4,9]]]]
+[[2,[[7,7],7]],[[5,8],[[9,3],[0,2]]]]
+[[[[5,2],5],[8,[3,7]]],[[5,[7,5]],[4,4]]]
diff --git a/testdata18-3.txt b/testdata18-3.txt
new file mode 100644
index 0000000..939f073
--- /dev/null
+++ b/testdata18-3.txt
@@ -0,0 +1,2 @@
+[[[0,[4,5]],[0,0]],[[[4,5],[2,6]],[9,5]]]
+[7,[[[3,7],[4,3]],[[6,3],[8,8]]]]
\ No newline at end of file
diff --git a/testdata18.txt b/testdata18.txt
new file mode 100644
index 0000000..70e9071
--- /dev/null
+++ b/testdata18.txt
@@ -0,0 +1,10 @@
+[[[0,[4,5]],[0,0]],[[[4,5],[2,6]],[9,5]]]
+[7,[[[3,7],[4,3]],[[6,3],[8,8]]]]
+[[2,[[0,8],[3,4]]],[[[6,7],1],[7,[1,6]]]]
+[[[[2,4],7],[6,[0,5]]],[[[6,8],[2,8]],[[2,1],[4,5]]]]
+[7,[5,[[3,8],[1,4]]]]
+[[2,[2,2]],[8,[8,1]]]
+[2,9]
+[1,[[[9,3],9],[[9,0],[0,7]]]]
+[[[5,[7,4]],7],1]
+[[[[4,2],2],6],[8,7]]