View Compilation Error

0_0_9356632_27109.cpp:15: error: `N' was not declared in this scope
0_0_9356632_27109.cpp: In function `int sap(int, int)':
0_0_9356632_27109.cpp:28: error: `E' undeclared (first use this function)
0_0_9356632_27109.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9356632_27109.cpp: In function `void addEdge(int, int, int)':
0_0_9356632_27109.cpp:69: error: `E' undeclared (first use this function)