1 class Solution
 2 {
 3     public:
 4         int totalFruit(vector<int>& tree)
 5         {
 6             vector<pair<int,int>> dealList;
 7             int curType = tree[0];
 8             int curSum = 1;
 9             for(int i = 1; i < tree.size(); i ++)
10             {
 
11                 if(tree[i]==curType)
12                     curSum ++;
13                 else
14                 {
15                     dealList.push_back(make_pair(curType,curSum));
16                     curSum = 1;
17                     curType = tree[i];
18                 }
19             }
 
20             dealList.push_back(make_pair(curType,curSum));
21 
22         //    for(auto d:dealList)
23         //        cout << d.first << " " << d.second << endl;
24         //    cout << endl;
25 
26             int result = dealList[0].second;
27             int max = 1
 
;
28             int typeA = dealList[0].first,typeB = -1;
29             int justI;
30             for(int i = 1; i < dealList.size(); i ++)
31             {
32                 if(dealList[i].first != typeA && typeB == -1)
33                 {
34                     typeB = dealList[i].first;
35                     result += dealList[i].second;
36                     justI = i;
37                     //cout << dealList[i].first << endl;
38                 }
39                 else if(dealList[i].first == typeA || dealList[i].first==typeB)
40                 {
41                     result += dealList[i].second;
42                     //    cout << dealList[i].first << endl;
43                 }
44                 else if(dealList[i].first != typeA && dealList[i].first != typeB)
45                 {
46                 //    cout << dealList[i].first << endl;
47                     result = dealList[justI].second;
48                     i = justI;
49                     typeB = -1;
50                     typeA = dealList[justI].first;
51                 }
52                 //    cout << dealList[i].first << endl;
53                 if(result > max)
54                     max = result;
55             }
56             if(result > max)
57                 max = result;
58             return max;
59         }
60 };

Leetcode-904 水果成籃