diff --git a/2023/day03.py b/2023/day03.py
new file mode 100755
index 0000000..beacf37
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+++ b/2023/day03.py
@@ -0,0 +1,77 @@
+#!/usr/bin/python3
+"""
+Jour 03 du défi Advent Of Code pour l'année 2023
+"""
+
+def read_sample():
+    """récupère les entrées depuis le fichier texte correspondant"""
+    with open('inputs/day03.txt', 'r') as f:
+        sample = f.read().split('\n')
+    sample = [ i for i in sample if i != '' ]
+    return sample
+
+def get_numbers(sample):
+    numbers = []
+    cur_number = 0
+    cur_number_start = -1
+    for i in range(len(sample)):
+        if (cur_number_start != -1):
+            numbers.append((cur_number, i-1, cur_number_start, len(sample[0])))
+            cur_number = 0
+            cur_number_start = -1
+        for j in range(len(sample[i])):
+            if (sample[i][j] <= '9' and sample[i][j] >= '0'):
+                if cur_number_start == -1:
+                    cur_number_start = j
+                cur_number = cur_number*10 + int(sample[i][j])
+            elif cur_number_start != -1:
+                numbers.append((cur_number, i, cur_number_start, j-1))
+                cur_number = 0
+                cur_number_start = -1
+    return numbers
+
+def is_symbol_adjacent(number, sample):
+    for i in range(max(0, number[1]-1), min(number[1]+2, len(sample)-1)):
+        for j in range(max(0, number[2]-1), min(len(sample[0])-1, number[3]+2)):
+            if sample[i][j] != '.' and not (sample[i][j] <= '9' and sample[i][j] >= '0'):
+                return True, (sample[i][j], i, j)
+    return False, ('.', 0, 0)
+
+def part1(sample):
+    """Partie 1 du défi"""
+    numbers = get_numbers(sample)
+    not_adj = []
+    for number in numbers:
+        if is_symbol_adjacent(number, sample)[0]:
+            not_adj.append(number[0])
+    return sum(not_adj)
+
+
+
+def part2(sample):
+    """Partie 2 du défi"""
+    numbers = get_numbers(sample)
+    geared = {}
+    for number in numbers:
+        val, symb = is_symbol_adjacent(number, sample)
+        if symb[0] == '*':
+            if (symb[1], symb[2]) not in geared.keys():
+                geared[(symb[1], symb[2])] = []
+            geared[(symb[1], symb[2])].append(number[0])
+            
+    mults = []
+    for key in geared.keys():
+        if len(geared[key]) >= 2:
+            mults.append(geared[key][0]*geared[key][1])
+            
+    return sum(mults)
+
+
+def main():
+    """Fonction principale"""
+    sample = read_sample()
+    print(f"part1: {part1(sample)}")
+    print(f"part2: {part2(sample)}")
+
+if __name__ == "__main__":
+    main()
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