View Compilation Error

0_0_17638922_3815.cpp: In function 'int main()':
0_0_17638922_3815.cpp:27:16: error: 'x' was not declared in this scope
             if(x&(1<<i))
                ^
0_0_17638922_3815.cpp:43:12: error: 'x' was not declared in this scope
         sg[x] = res;
            ^