View Compilation Error

0_0_38208349_15000.cpp: In function 'int main()':
0_0_38208349_15000.cpp:8:24: error: 'N' was not declared in this scope
         if(A==0&&B==0&&N==0)
                        ^
0_0_38208349_15000.cpp:12:23: error: 'm' was not declared in this scope
         for(int i=3;3<m;i++)
                       ^