40 lines
1.3 KiB
Java
40 lines
1.3 KiB
Java
import java.util.List;
|
|
|
|
public class Cusip {
|
|
private static Boolean isCusip(String s) {
|
|
if (s.length() != 9) return false;
|
|
int sum = 0;
|
|
for (int i = 0; i <= 7; i++) {
|
|
char c = s.charAt(i);
|
|
|
|
int v;
|
|
if (c >= '0' && c <= '9') {
|
|
v = c - 48;
|
|
} else if (c >= 'A' && c <= 'Z') {
|
|
v = c - 55; // lower case letters apparently invalid
|
|
} else if (c == '*') {
|
|
v = 36;
|
|
} else if (c == '@') {
|
|
v = 37;
|
|
} else if (c == '#') {
|
|
v = 38;
|
|
} else {
|
|
return false;
|
|
}
|
|
if (i % 2 == 1) v *= 2; // check if odd as using 0-based indexing
|
|
sum += v / 10 + v % 10;
|
|
}
|
|
return s.charAt(8) - 48 == (10 - (sum % 10)) % 10;
|
|
}
|
|
|
|
public static void main(String[] args) {
|
|
List<String> candidates = List.of(
|
|
"037833100", "17275R102", "38259P508", "594918104", "68389X106", "68389X105", "EXTRACRD8",
|
|
"EXTRACRD9", "BADCUSIP!", "683&9X106", "68389x105", "683$9X106", "68389}105", "87264ABE4"
|
|
);
|
|
for (String candidate : candidates) {
|
|
System.out.printf("%s -> %s%n", candidate, isCusip(candidate) ? "correct" : "incorrect");
|
|
}
|
|
}
|
|
}
|