#18 23.02.11 > 4 > 한수 다시 풀기

src/bj/silver/4/README.md

@@ -27,4 +27,4 @@
 | 23  |  10866   |             [덱](./10866.js)             | 23.01.04  |     O     |
 | 24  |  11047   |           [동전0](./11047.js)            | 23.01.13  |     O     | [23.01.16](./replay/11047.js) |
 | 25  |  17219   |       [비밀번호 찾기](./17219.js)        | 23.01.24  |     O     |
-| 26  |   1065   |            [한수](./1065.js)             | 23.02.09  |     X     |
+| 26  |   1065   |            [한수](./1065.js)             | 23.02.09  |     X     | [23.02.11](./replay/1065.js)  |

src/bj/silver/4/replay/1065.js

@@ -0,0 +1,20 @@
+"use strict";
+
+const n = require("fs").readFileSync("/dev/stdin").toString();
+const solution = (n) => {
+  let answer = 0;
+  for (let i = 1; i <= n; i++) {
+    if (i < 100) {
+      answer++;
+      continue;
+    }
+    let nStr = i + "";
+    let a = +nStr[0] - +nStr[1];
+    let b = +nStr[1] - +nStr[2];
+
+    if (a === b) answer++;
+  }
+  return answer;
+};
+
+console.log(solution(+n));