// 数组比List还要慢一点（10%以内）
static int GetMinPlusSum_nlogn_Struct(int[] A)
{
SumPair[] sumByIndex = new SumPair[A.Count()];
int thisSum = 0;
int minSum = int.MaxValue;
for (int i = 0; i < A.Count(); i++)
{
thisSum = thisSum + A[i];
if (thisSum > 0)
{
minSum = Math.Min(minSum, thisSum);
}
var sumPair = new SumPair();
sumPair.Sum = thisSum;
sumPair.Index = i;
sumByIndex[i] = sumPair;
}
Array.Sort(sumByIndex);
for (int i = 1; i < sumByIndex.Count(); i++)
{
if (sumByIndex[i].Index > sumByIndex[i - 1].Index
&&
(sumByIndex[i].Sum - sumByIndex[i - 1].Sum) > 0)
{
minSum = Math.Min(minSum, sumByIndex[i].Sum - sumByIndex[i - 1].Sum);
}
}
return(minSum);
}
static int GetMinPlusSum_nlogn_List(int[] A)
{
var sumByIndex = new List <SumPair>(A.Count());
int thisSum = 0;
int minSum = int.MaxValue;
for (int i = 0; i < A.Count(); i++)
{
thisSum = thisSum + A[i];
if (thisSum > 0)
{
minSum = Math.Min(minSum, thisSum);
}
var sumPair = new SumPair();
sumPair.Sum = thisSum;
sumPair.Index = i;
sumByIndex.Add(sumPair);
}
sumByIndex.Sort();
for (int i = 1; i < sumByIndex.Count(); i++)
{
if (sumByIndex[i].Index > sumByIndex[i - 1].Index
&&
(sumByIndex[i].Sum - sumByIndex[i - 1].Sum) > 0)
{
minSum = Math.Min(minSum, sumByIndex[i].Sum - sumByIndex[i - 1].Sum);
}
}
return(minSum);
}