Bridge and Torch Logic Puzzle (written in Go)

input.json

{
    "participants":[
        {
            "name": "Sam",
            "speed": 5
        },
        {
            "name": "Mouna",
            "speed": 1
        },
        {
            "name": "Shiv",
            "speed": 8
        },
        {
            "name": "Arjun",
            "speed": 2
        }
    ]
}