View Compilation Error

0_0_17973107_24397.cpp: In function 'int main()':
0_0_17973107_24397.cpp:97:12: error: 'x' was not declared in this scope
         if(x==1) add(1,y,y,1);
            ^
0_0_17973107_24397.cpp:97:24: error: 'y' was not declared in this scope
         if(x==1) add(1,y,y,1);
                        ^
0_0_17973107_24397.cpp:99:31: error: 'y' was not declared in this scope
               int sum=query(1,y,y);
                               ^
0_0_17973107_24397.cpp:103:5: error: expected primary-expression before '}' token
     }
     ^