编程之美--2.3

 1 #include <iostream>
 2 #include <queue>
 3 #include <climits>
 4 #include <algorithm>
 5 #include <memory.h>
 6 #include <stdio.h>
 7 using namespace std;
 8 
 9 int fun(vector<int> a)
10 {
11     if(a.size() == 0)
12         return 0;
13     int num = 0;
14     int cur = a[0];
15     for(int i = 1 ; i < a.size() ; ++i)
16     {
17         if(num == 0)
18         {
19             cur = a[i];
20             num = 1;
21         }
22         else
23         {
24             if(cur == a[i])
25             {
26                 num++;
27             }
28             else
29             {
30                 num--;
31             }
32         }
33     }
34     return cur;
35 }
36 
37 int main()
38 {
39     vector<int> a;
40     a.push_back(1);
41     a.push_back(2);
42     a.push_back(3);
43     a.push_back(2);
44     a.push_back(2);
45     cout<<fun(a)<<endl;
46     return 0;
47 }