View Compilation Error

0_0_24308543_11078.cpp: In function 'int query(int, int, int, int)':
0_0_24308543_11078.cpp:22:16: error: 'l' was not declared in this scope
         return l;
                ^
0_0_24308543_11078.cpp: In function 'int main()':
0_0_24308543_11078.cpp:38:29: error: 'h' was not declared in this scope
     while (~scanf("%d%d%d",&h,&w,&n)) {  
                             ^
0_0_24308543_11078.cpp:38:32: error: 'w' was not declared in this scope
     while (~scanf("%d%d%d",&h,&w,&n)) {  
                                ^
0_0_24308543_11078.cpp:38:35: error: 'n' was not declared in this scope
     while (~scanf("%d%d%d",&h,&w,&n)) {  
                                   ^
0_0_24308543_11078.cpp:44:17: error: 'MAX' was not declared in this scope
             if (MAX[1] < x) puts("-1");  
                 ^