Solve SSN 1 in python

solutions/beecrowd/1769/1769.py

@@ -0,0 +1,18 @@
+import sys
+
+for line in sys.stdin:
+    cpf_digits = list(
+        map(int, filter(lambda x: x not in ['.', '-'], line.strip()))
+    )
+
+    b1, b2 = 0, 0
+    for index, cpf_digit in enumerate(cpf_digits[:9]):
+        b1 += cpf_digit * (index + 1)
+        b2 += cpf_digit * (9 - index)
+    b1 = 0 if b1 % 11 == 10 else b1 % 11
+    b2 = 0 if b2 % 11 == 10 else b2 % 11
+
+    if b1 == cpf_digits[9] and b2 == cpf_digits[10]:
+        print('CPF valido')
+    else:
+        print('CPF invalido')

solutions/beecrowd/1769/generate_in.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+TEST_CASES=10000
+
+function print_valid_cpf {
+    # https://pt.wikipedia.org/wiki/Cadastro_de_Pessoas_F%C3%ADsicas#C%C3%A1lculo_do_d%C3%ADgito_verificador
+    digits=()
+    verifier_1=0
+    verifier_2=0
+    for index in $(seq 0 8); do
+        digit=$((RANDOM % 10))
+        digits+=("${digit}")
+        verifier_1=$((verifier_1 + (digit * (9 - (index % 10)))))
+        verifier_2=$((verifier_2 + (digit * (9 - ((index + 1) % 10)))))
+    done
+    for index in $(seq 8 0); do
+        echo -n "${digits[${index}]}"
+        if [[ ${index} -eq 6 ]] || [[ ${index} -eq 3 ]]; then
+            echo -n "."
+        fi
+    done
+
+    echo -n "-"
+
+    [[ $((verifier_1 % 11)) -eq 10 ]] && verifier_1=0 || verifier_1=$((verifier_1 % 11))
+    echo -n "${verifier_1}"
+
+    verifier_2=$((verifier_2 + (verifier_1 * 9)))
+    [[ $((verifier_2 % 11)) -eq 10 ]] && echo "0" || echo "$((verifier_2 % 11))"
+}
+
+function print_probably_invalid_cpf {
+    for index in $(seq 11); do
+        echo -n "$((RANDOM % 10))"
+        if [[ ${index} -eq 3 ]] || [[ ${index} -eq 6 ]]; then
+            echo -n "."
+        fi
+        if [[ ${index} -eq 9 ]]; then
+            echo -n "-"
+        fi
+    done
+    echo
+}
+
+for _ in $(seq "${TEST_CASES}"); do
+    if [[ $((RANDOM % 2)) -eq 0 ]]; then
+        print_valid_cpf
+    else
+        print_probably_invalid_cpf
+    fi
+done
+