View Compilation Error

0_0_29734372_18411.cpp:6:13: error: 'M' was not declared in this scope
 LL tree[12][M*2+10];
             ^
0_0_29734372_18411.cpp: In function 'void add(int, int, int, int)':
0_0_29734372_18411.cpp:10:11: error: 'tree' was not declared in this scope
   if(~l&1)tree[i][l^1]+=v;
           ^
0_0_29734372_18411.cpp:11:10: error: 'tree' was not declared in this scope
   if(r&1)tree[i][r^1]+=v;
          ^
0_0_29734372_18411.cpp: In function 'long long int query(int, int)':
0_0_29734372_18411.cpp:17:24: error: 'tree' was not declared in this scope
  for(n+=M;n;n>>=1)ans+=tree[i][n];
                        ^
0_0_29734372_18411.cpp: In function 'int main()':
0_0_29734372_18411.cpp:32:5: error: 'tree' was not declared in this scope
     tree[i][j]=0;
     ^