1 typedef long long ll;
2 #define _for(i,a,b) for(int i = (a);i < b;i ++)
3 #define _rep(i,a,b) for(int i = (a);i > b;i --)
4 #define INF 0x3f3f3f3f
5 #define pb push_back
6 #define maxn 10000
7
8 class Solution
9 {
10 public:
11 bool uniqueOccurrences(vector<int>& arr)
12 {
13 int Hash[2003];
14 memset(Hash,0,sizeof(Hash));
15 _for(i,0,arr.size())
16 Hash[arr[i]+1000] ++;
17
18 _for(i,0,2001)
19 {
20 _for(j,i+1,2001)
21 {
22 if(Hash[i] && Hash[i]==Hash[j])
23 return false;
24 }
25 }
26 return true;
27 }
28 };
