HDU 1029 Ignatius and the Princess IV

 1 #include<iostream>
 2 #include<sstream>
 3 #include<cstdio>
 4 #include<cstdlib>
 5 #include<string>
 6 #include<cstring>
 7 #include<algorithm>
 8 #include<functional>
 9 #include<iomanip>
10 #include<numeric>
11 #include<cmath>
12 #include<queue>
13 #include<vector>
14 #include<set>
15 #include<cctype>
16 #define PI acos(-1.0)
17 const int INF = 0x3f3f3f3f;
18 const int NINF = -INF - 1;
19 const int maxn = 1e6 + 5;
20 typedef long long ll;
21 using namespace std;
22 int n;
23 int sum[maxn];
24 int main()
25 {
26     while (scanf("%d", &n) != EOF)
27     {
28         int num = (n + 1) / 2;
29         memset(sum, 0, sizeof(sum));
30         int len = 0;
31         for (int i = 0; i < n; ++i)
32         {
33             int x;
34             scanf("%d", &x);
35             sum[x]++;
36             len = max(len, x);
37         }
38         for (int i = 0; i <= len; ++i)
39         {
40             if (sum[i] >= num)
41                 printf("%d\n", i);
42         }
43     }
44     return 0;
45 }