diff --git a/Exercises/1-ids.js b/Exercises/1-ids.js
index 29b9450..d060ef8 100644
--- a/Exercises/1-ids.js
+++ b/Exercises/1-ids.js
@@ -1,20 +1,21 @@
'use strict';
const ids = function* () {
- const free = ['0'];
- const prepared = { has: false, value: '' };
-
+ let base = '1';
+ let rank = -1;
while (true) {
- if (prepared.has) {
- prepared.has = false;
- yield prepared.value;
+ if (rank === -1) {
+ base = `1${'0'.repeat(base.length + 1)}`;
+ rank = base.length - 2;
+ yield base;
+ }
+ if (base[rank] === '0') {
+ base = `${base.slice(0, rank)}1${'0'.repeat(base.length - rank - 1)}`;
+ rank = base.length - 2;
+ yield base;
+ } else {
+ rank -= 2;
}
- const nextFree = free.shift();
- free.push('01' + nextFree);
- free.push('00' + nextFree);
- prepared.value = '11' + nextFree;
- prepared.has = true;
- yield '10' + nextFree;
}
};
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