View Compilation Error

0_0_21713821_1258.cpp:11:7: error: 'll' does not name a type
 const ll mod  = 1e9 + 7;
       ^
0_0_21713821_1258.cpp:14:1: error: 'll' does not name a type
 ll binomialCoeff(int n, int k)
 ^
0_0_21713821_1258.cpp: In function 'int main()':
0_0_21713821_1258.cpp:39:43: error: 'binomialCoeff' was not declared in this scope
                 cout << binomialCoeff(n, m) % mod <<endl;
                                           ^
0_0_21713821_1258.cpp:39:47: error: 'mod' was not declared in this scope
                 cout << binomialCoeff(n, m) % mod <<endl;
                                               ^
0_0_21713821_1258.cpp:42:43: error: 'binomialCoeff' was not declared in this scope
                 cout << binomialCoeff(m, n) % mod<< endl;
                                           ^
0_0_21713821_1258.cpp:42:47: error: 'mod' was not declared in this scope
                 cout << binomialCoeff(m, n) % mod<< endl;
                                               ^