04. Train The Trainers

function solve(input) {
  let n = Number(input[0]);

  let index = 1;
  let name = input[index];

  let totalAvg = 0;
  let countOfProblems = 0;

  while (name != "Finish") {
    countOfProblems++;
    let avgGrade = 0;
    for (let i = 0; i < n; i++) {
      let grade = Number(input[++index]);
      avgGrade += grade;
    }

    avgGrade /= n;
    totalAvg += avgGrade;
    console.log(`${name} - ${avgGrade.toFixed(2)}.`);

    name = input[++index];
  }

  console.log(`Student's final assessment is ${(totalAvg / countOfProblems).toFixed(2)}.`)
}