feat: add solutions for problems #199, #1161, #700, #450, #136, #338, #1318

feat: add solutions for problems #104, #872, #1448, #437, #1372, #236

feat: add solutions for problems #2390, #735, #394, #2095, #328, #206, #2130

feat: add solutions for problems #2215, #1207, #1657, #2352, #933, #649

feat: add solutions for problems #334, #238, #151, #443, #1732, #724

feat: add solutions for problems #605, #345, #11, #1679, #643

docs: add README with solutions list

feat: add solutions for problems #1768, #1071, #1431, #283, #392

chore: initial project setup