public static string StrBuilder100()
{
List <string> listRes = new List <string>();
string result = "";
int count = 0;
MyRes mr = new MyRes();
do
{
mr = Calc();
if (mr.IntRes == 100)
{
if (!listRes.Contains(mr.StrRes))
{
listRes.Add(mr.StrRes);
}
//Console.WriteLine("{0}) {1} = {2}", count, mr.StrRes, mr.IntRes);
}
if (++count > 70000)
{
break;
}
}while (true);// (mr.IntRes != 100);
int counter = 0;
foreach (var item in listRes)
{
counter++;
Console.WriteLine("{0}) {1} = 100;", counter, item);
}
return(result);
}
static MyRes Calc()
{
List <int> list = new List <int>()
{
1, 2, 3, 4, 5, 6, 7, 8, 9
};
MyRes myRes = new MyRes();
bool isFirst = true;
for (int i = 0; i < list.Count; ++i)
{
Thread.Sleep(1);
Random rnd = new Random((int)DateTime.Now.Ticks & 0x0000FFFF);
int iRnd = rnd.Next(0, 3);
switch (iRnd)
{
case 0:
myRes.IntRes += list[i];
if (isFirst)
{
myRes.StrRes = myRes.StrRes + list[i].ToString();
isFirst = !isFirst;
}
else
{
myRes.StrRes = myRes.StrRes + "+" + list[i].ToString();
}
break;
case 1:
if (isFirst)
{
myRes.IntRes = list[i];
myRes.StrRes = myRes.StrRes + list[i].ToString();
isFirst = !isFirst;
}
else
{
myRes.IntRes -= list[i];
myRes.StrRes = myRes.StrRes + "-" + list[i].ToString();
}
break;
default:
if (i < list.Count - 1)
{
//if (list[i] * 10 + list[i + 1] > 123) break;
list[i + 1] = list[i] * 10 + list[i + 1];
}
else
{
Thread.Sleep(1);
Random r = new Random((int)DateTime.Now.Ticks & 0x0000FFFF);
int ir = rnd.Next(0, 2);
if (ir == 0)
{
myRes.IntRes += list[i];
myRes.StrRes = myRes.StrRes + "+" + list[i].ToString();
}
else
{
myRes.IntRes -= list[i];
myRes.StrRes = myRes.StrRes + "-" + list[i].ToString();
}
}
break;
}
}
return(myRes);
}
