SRM632 Div2 1000 DP

 1 #include <cstdio>
 2 #include <string>
 3 #include <vector>
 4 #include <map>
 5 using namespace std;
 6 
 7 #define LL long long
 8 
 9 class GoodSubset{
10 public:
11     map<int, int> mp;
12     int numberOfSubsets(int goodValue, vector <int> d){
13         const LL MOD = 1000000007;
14         map<LL, LL> mp;
15         mp[1] = 1;
16         map<LL, LL>::reverse_iterator it;
17         for(int i = 0; i < d.size(); i++){
18             LL val = d[i];
19             for(it = mp.rbegin(); it != mp.rend(); it++){
20                 LL z = it->first; z *= val;
21                 if(goodValue % z == 0){
22                     mp[z] = (mp[z] + it->second) % MOD;
23                 }
24             }
25         }
26         mp[1]--;
27         return mp[goodValue];
28     }
29 };