first

2023-08-22 13:29:32 -03:00
commit a3306596e1
2 changed files with 136 additions and 0 deletions
@@ -0,0 +1,60 @@
+frequencias = {
+    'A': 14.63,
+    'B': 1.04,
+    'C': 3.88,
+    'D': 4.99,
+    'E': 12.57,
+    'F': 1.02,
+    'G': 1.30,
+    'H': 1.28,
+    'I': 6.18,
+    'J': 0.40,
+    'K': 0.02,
+    'L': 2.78,
+    'M': 4.74,
+    'N': 5.05,
+    'O': 10.73,
+    'P': 2.52,
+    'Q': 1.20,
+    'R': 6.53,
+    'S': 7.81,
+    'T': 4.34,
+    'U': 4.63,
+    'V': 1.67,
+    'W': 0.01,
+    'X': 0.21,
+    'Y': 0.01,
+    'Z': 0.47
+}
+
+def afreq(string):
+    # determinar a frequencia de cada caractere na string
+    # comparar com a frequencia de cada caractere na lingua portuguesa
+    # calcular a diferenca entre as frequencias
+
+    str_freq = {}
+    for c in string:
+        if not c.isalnum():
+            continue
+
+        if c in str_freq:
+            str_freq[c] += 1
+        else:
+            str_freq[c] = 1
+
+    for c in str_freq:
+        if not c.isalnum():
+            continue
+
+        str_freq[c] /= len(string)
+
+    freq_sorted = dict(sorted(str_freq.items(), key=lambda item: item[1]))
+
+    possiveis_chaves = []
+    for c in frequencias:
+        for k in freq_sorted:
+            if abs(frequencias[c] - freq_sorted[k]) < 0.5:
+                possiveis_chaves.append(ord(k) - ord(c))
+
+    return possiveis_chaves
+