Elegant Comma-Separated String Generation in C++

Elegant Comma-Separated String Generation in C++: a task in Terminal-Lego-15k (Harbor dataset). You are given a C++ program that converts a vector of integers into a comma-separated string. However, the current implementation produces a trailing comma at the end of the output (e.g., 1,2,3,4,5…

The task

You are given a C++ program that converts a vector of integers into a comma-separated string. However, the current implementation produces a trailing comma at the end of the output (e.g., `1,2,3,4,5,` instead of `1,2,3,4,5`).

Part of PrimeIntellect/Terminal-Lego-15k.