\[\Huge\text{709 Round Day 5}
\]
\[\large\text{Math Round}
\]
\[\large\text{Time: 2023.5.8 17:40 - 18:00}
\]
\[\large\text{出题: phx 验题: yhn 题面: phx}
\]
\[\large\text{满分: 200 分}
\]
- （
\[\Huge\text{709 Round Day 5 Solution}
\]
\[\large\text{Math Round}
\]
\[\large\text{Time: 2023.5.8 17:40 - 18:00}
\]
\[\large\text{出题: phx 验题: yhn 题面: phx 题解: phx}
\]
\[\large\text{满分: 200 分}
\]