View Compilation Error

0_0_18711469_2319.cpp: In function 'int main()':
0_0_18711469_2319.cpp:82:17: error: 'T' was not declared in this scope
     scanf("%d",&T) ;
                 ^
0_0_18711469_2319.cpp:96:15: error: 'sg' cannot be used as a function
    res ^= sg(x);
               ^