class Range
        {
            public int Min { get; private set; }
            public int Max { get; private set; }

            public Range(int min_inclusive, int max_exclusive)
            {
                Min = min_inclusive;
                Max = max_exclusive;
            }

            public bool Contains(decimal num)
            {
                return Min <= num && num < Max;
            }

            public override string ToString()
            {
                return string.Format("{0} ~ {1}", Min, Max);
            }
        }
        
        static void Main(string[] args)
        {
            var ranges = new List<Range>()
            {
                new Range(0,10),
                new Range(10,30),
                new Range(30,35)
            };
            
            var numbers = new[] { 1.1m, 2, 36, -1m, 100.9m, 44, 19.0m };

            //当range数目远大于numbers数目时用这个更高效
            var accounting1 = ranges.ToDictionary(r => r, r => numbers.Count(n => r.Contains(n)));

            //当numbers数目远大于range时用这个更高效
            var accounting2 = numbers.Aggregate(ranges.ToDictionary(r => r, r => 0), (dict, n) =>
                {
                    var range = dict.Keys.SingleOrDefault(r => r.Contains(n));
                    if (range != null) dict[range]++;
                    return dict;
                });
        }