View Compilation Error

In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cassert:43:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:33,
                 from 0_0_30147335_9601.cpp:4:
0_0_30147335_9601.cpp: In function 'int newNode()':
0_0_30147335_9601.cpp:50:12: error: 'tot' was not declared in this scope
     assert(tot < N * 40);
            ^