docs : update README.md (week1)

Author: spring0913

README.md

@@ -1,2 +1,14 @@
 # 알고리즘 스터디
 
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+## 1주차 그리디 
+| 문제                                            | 풀이 |
+|-----------------------------------------------|----|
+| [카드 합체 놀이](https://www.acmicpc.net/problem/15903)   | [BOJ15903.java](https://github.com/java-algorithm/bom/commit/ad2cd3fbd9018bdce36e163af5fc86f3cb31d14b)   |
+| [통나무 건너뛰기](https://www.acmicpc.net/problem/11497)  |   [BOJ11497.java](https://github.com/java-algorithm/bom/commit/c4b00a9b448ec79657fa86e5049a3e1ef2b1be1c) |
+| [초콜릿 식사](https://www.acmicpc.net/problem/2885)    |  [BOJ2885.java](https://github.com/java-algorithm/bom/commit/3d091664e56f93bd53fc610e1d167c5478cb3aab)  |
+| [체인](https://www.acmicpc.net/problem/2785)  |   [BOJ2785.java](https://github.com/java-algorithm/bom/commit/cd340e94044097fcf2642be7d6680f684789009f) |
+| [병든 나이트](https://www.acmicpc.net/problem/1783) |  [BOJ1783.java](https://github.com/java-algorithm/bom/commit/1ae266e55c04692099e7a16f7d15cb10fab1df3b)  |
+| [뒤집기2](https://www.acmicpc.net/problem/1455)  |  [BOJ1455.java](https://github.com/java-algorithm/bom/commit/88c8fff8dfc909582df1facb8a78739ebcdaa659)  |
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+