View Compilation Error

0_0_21338113_15495.cpp: In function 'int query(int, int, int, int, int)':
0_0_21338113_15495.cpp:81:37: error: 'x' was not declared in this scope
     if(left<=l&&r<=right)return pos[x];
                                     ^
0_0_21338113_15495.cpp: In function 'bool check(int, int)':
0_0_21338113_15495.cpp:98:11: error: 'i' was not declared in this scope
     if(lm[i]!=l&&rm[i]!=r)return 0;
           ^