#21 22.07.19 > 구현 실전 1번 복습

src/cote/README.md

@@ -2,4 +2,4 @@
 ||문제종류|문제명|응시 날짜|채점 결과|재응시예정|
 |:-:|:-|:-:|:---:|:---:|:-:|
 |1|[그리디](./greedy/)|[예제](./greedy/greedy_ex.js)<br>[연습1](./greedy/greedy_01.js)<br>[연습2](./greedy/greedy_02.js)<br>[연습3](./greedy/greedy_03.js)<br>-<br>[실전1](./greedy/test_01.js)<br>[실전2](./greedy/test_02.js)<br>[실전3](./greedy/test_03.js)<br>|22.07.14<br><br><br><br>-<br>22.07.16<br><br><br>|O<br>X<br>O<br>O<br>-<br>O<br>O<br>O<br>|X<br>[22.07.16](./greedy/replay_01.js)<br>X<br>X<br>-<br>O<br>X<br>X<br>|
-|2|[구현](./implementation/)|[예제1](./implementation/imple_ex01.js)<br>[예제2](./implementation/imple_ex02.js)<br>[연습1](./implementation/imple_01.js)<br>[연습2](./implementation/imple_02.js)|22.07.15|△<br>△<br>△<br>X|[22.07.17](./implementation/../replay_01.js)<br>[22.07.18](./implementation/replay_02.js)<br>O<br>O|
+|2|[구현](./implementation/)|[예제1](./implementation/imple_ex01.js)<br>[예제2](./implementation/imple_ex02.js)<br>[연습1](./implementation/imple_01.js)<br>[연습2](./implementation/imple_02.js)|22.07.15|△<br>△<br>△<br>X|[22.07.17](./implementation/../replay_01.js)<br>[22.07.18](./implementation/replay_02.js)<br>[22.07.19](./implementation//replay_03.js)<br>O|

src/cote/implementation/replay_03.js

@@ -0,0 +1,19 @@
+'use strict';
+
+function solution(position) {
+    let answer = 0;
+    let [x, y] = position.split('');
+    const column = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
+    y = column.indexOf(x)+1; // col
+    x = y*1; // rowㄴ
+    const steps = [[-2, 1], [-1, 2], [1, 2], [2, 1], [2,-1], [1,-2], [-1, -2], [-2, -1]];
+
+    steps.forEach((pos) => {
+        let nx = x + pos[0];
+        let ny = y + pos[1];
+        if(nx >= 1 && ny >= 1 && nx <= 8 && ny <= 8) answer++;
+    });
+    return answer;
+}
+
+console.log(solution('a1'));