View Compilation Error

0_0_29982456_27562.cpp: In function 'int main()':
0_0_29982456_27562.cpp:100:30: error: 'read_int' was not declared in this scope
     for (int kase = read_int(); kase > 0; --kase) {
                              ^
0_0_29982456_27562.cpp:111:43: error: 'struct MCMF' has no member named 'Add_Edge'
                 if (arr[i] <= arr[j])mcmf.Add_Edge(i + n, j, 1, 0);
                                           ^
0_0_29982456_27562.cpp:117:45: error: no matching function for call to 'MCMF::solve(int&, int&, const int&, int&)'
         cout << -mcmf.solve(s1, t, INF, flow) << endl;
                                             ^
0_0_29982456_27562.cpp:117:45: note: candidate is:
0_0_29982456_27562.cpp:58:9: note: int MCMF::solve(int, int, int&, int)
     int solve(int s, int t, int &flow, int limit) {
         ^
0_0_29982456_27562.cpp:58:9: note:   no known conversion for argument 3 from 'const int' to 'int&'