View Compilation Error

0_0_21752289_4658.cpp:95:28: error: declaration of 'int N'
  int sap(int s, int t, int N) {
                            ^
0_0_21752289_4658.cpp:52:11: error:  shadows template parm 'int N'
 template <int N, int M>
           ^
0_0_21752289_4658.cpp: In member function 'int Isap<N, M>::sap(int, int, int)':
0_0_21752289_4658.cpp:95:28: error: declaration of 'int N'
  int sap(int s, int t, int N) {
                            ^
0_0_21752289_4658.cpp:52:11: error:  shadows template parm 'int N'
 template <int N, int M>
           ^