View Compilation Error

0_0_35995806_14201.cpp: In function 'int main()':
0_0_35995806_14201.cpp:25:2: error: 't' was not declared in this scope
  t=0;
  ^
0_0_35995806_14201.cpp:30:15: error: 'n' was not declared in this scope
   scanf("%d",&n);
               ^