/nix/store/jfkmqz20q8fsaqizcml86adxqyzlwllx-binutils-2.38/bin/ld: /nix/store/bzd91shky9j9d43girrrj6vmqlw7x9m8-glibc-2.35-163/lib/crt1.o: in function `_start':
(.text+0x1b): undefined reference to `main'
collect2: error: ld returned 1 exit status

[Hydro](https://hydro.ac)提供评测服务