91df817cfe
* fix(guide) add stubs and correct file path misspellings and pr… (#36528) * fix: corrected file path to match curriculum * fix: renamed to newer challenge name * fix: added solutions to articles from challenge files * fix: added missing .english to file name * fix: added missing title to guide article * fix: correct solution for guide article * fix: replaced stub with hint * fix: added space in Hint headers * fix: added solution to guide article * fix: added solution to guide article * test: replaced stub with hint and solution * fix: add Problem number: to title * fix: changed generatorexponential to correct name * fix: renamed knight's tour to knights-tour * fix: updated guide article
851 B
851 B
title
| title |
|---|
| CUSIP |
CUSIP
Solutions
Solution 1 (Click to Show/Hide)
function isCusip(s) {
if (s.length != 9) return false;
var sum = 0;
var ASCII = x => x.charCodeAt(0);
for (var i = 0; i < 7; i++) {
var c = s.charCodeAt(i);
var v;
if (c >= ASCII('0') && c <= ASCII('9')) {
v = c - 48;
} else if (c >= ASCII('A') && c <= ASCII('Z')) {
v = c - 64; // lower case letters apparently invalid
} else if (c == ASCII('*')) {
v = 36;
} else if (c == ASCII('@')) {
v = 37;
} else if (c == ASCII('#')) {
v = 38;
} else {
return false;
}
if (i % 2 == 1) v *= 2; // check if odd as using 0-based indexing
sum += Math.floor(v / 10) + v % 10;
}
return s.charCodeAt(8) - 48 == (10 - (sum % 10)) % 10;
}