View Compilation Error

0_0_27050276_7683.cpp: In function 'int main()':
0_0_27050276_7683.cpp:3:17: error: 'T' was not declared in this scope
     scanf("%d",&T);
                 ^
0_0_27050276_7683.cpp:5:21: error: 'n' was not declared in this scope
         scanf("%d",&n);
                     ^