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class Program
{
static void Main(string[] args)
{
string a ="abcdefg";
int l = a.Length;
string[] arr = new string[(l/3+1)];
int flag = 0;
for (int i = 0; i < (l / 3 + 1); i++)
{
if (i == l / 3)
{
arr[i] = a.Substring(flag, l - flag);
}
else
{
arr[i] = a.Substring(flag, 3);
flag += 3;
}
}
foreach (string i in arr)
Console.WriteLine(i);
}
}
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