View Compilation Error

0_0_39126937_1123.cpp:32:1: error: 'unordered_map' does not name a type
   32 | unordered_map<int,int> f[1010];
      | ^~~~~~~~~~~~~
0_0_39126937_1123.cpp: In function 'int main()':
0_0_39126937_1123.cpp:71:25: error: 'f' was not declared in this scope
   71 |             if(a[i]<=k) f[i][k/a[i]]=1;
      |                         ^
0_0_39126937_1123.cpp:77:29: error: 'f' was not declared in this scope
   77 |                 for(auto op:f[i]){
      |                             ^
0_0_39126937_1123.cpp:86:24: error: 'f' was not declared in this scope
   86 |             for(auto j:f[i]) (res+=f[i][j.first])%=Mod;
      |                        ^