using System;
using System.Collections.Generic;
using System.Linq;
class MainClass {
static void Main() {
int[] array = new int[5] {1,3,5,6,9};
bool retData = HasPairWithSum(array,8);
Console.WriteLine(retData);
}
private static bool HasPairWithSum(int[] data, int sum)
{
int low= 0;
int high = data.Length - 1;
for(int i = high ; i >= 0 ; i--)
{
if(data[i] >= sum)
{
high = high - 1;
}
else
{
break;
}
}
Console.WriteLine(high);
while (low < high){
int s = sum - data[high];
if(data[low] == s)
return true;
low = high - 1;
}
return false;
}
}
