diff --git a/Exercises/1-ids.js b/Exercises/1-ids.js
index 29b9450..6e91d57 100644
--- a/Exercises/1-ids.js
+++ b/Exercises/1-ids.js
@@ -1,20 +1,15 @@
'use strict';
-const ids = function* () {
- const free = ['0'];
- const prepared = { has: false, value: '' };
-
- while (true) {
- if (prepared.has) {
- prepared.has = false;
- yield prepared.value;
+const ids = function* (i = 0) {
+ for (;;++i) {
+ const left = 4 << i * 2;
+ for (let j = 0; j < 2 << i; j++) {
+ let res = 0;
+ for (let k = 0; k < i + 1; k++) {
+ res += (j & (1 << k)) << (k + 1);
+ }
+ yield (left + res).toString(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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