View Compilation Error

0_0_38388454_2194.cpp: In function 'int main()':
0_0_38388454_2194.cpp:22:12: error: 'class std::unordered_map<int, int>' has no member named 'first'
    int t=p.first,a=p.second;
            ^
0_0_38388454_2194.cpp:24:10: error: 'a' was not declared in this scope
    while(a--) r=(r*t+1)%mod;
          ^
0_0_38388454_2194.cpp:28:8: error: 'cnt' was not declared in this scope
  cout<<cnt;
        ^