[11/10] 그리디, DP | Notion

구현 2문제, 그리디 2문제, DP 3문제
구현
- 골드1
  - https://www.acmicpc.net/problem/21611
그리디
- 골드5
  - https://www.acmicpc.net/problem/2212
  - https://www.acmicpc.net/problem/1092
DP
- 실버1
  - https://www.acmicpc.net/problem/1890
- 골드5
  - https://www.acmicpc.net/problem/15486
  - https://www.acmicpc.net/problem/2293
- 골드4
  - https://www.acmicpc.net/problem/10942