View Compilation Error

0_0_30408672_1969.cpp: In function 'int update(int, int, int, int)':
0_0_30408672_1969.cpp:28:21: error: 'tot' was not declared in this scope
     int newroot = ++tot; int tem = newroot;
                     ^
0_0_30408672_1969.cpp: In function 'int main()':
0_0_30408672_1969.cpp:56:9: error: 'tot' was not declared in this scope
         tot = 0; int n, m; cin >> n >> m;
         ^