View Compilation Error

0_0_39703076_20012.cpp: In function 'int main()':
0_0_39703076_20012.cpp:18:17: error: 't' was not declared in this scope
   18 |     scanf("%d",&t);
      |                 ^
0_0_39703076_20012.cpp:26:13: error: 'stu' was not declared in this scope; did you mean 'std'?
   26 |             stu[i].f=1;
      |             ^~~
      |             std
0_0_39703076_20012.cpp:36:20: error: 'stu' was not declared in this scope; did you mean 'std'?
   36 |                 if(stu[j].s<p && st[j].f){
      |                    ^~~
      |                    std
0_0_39703076_20012.cpp:37:29: error: 'struct node' has no member named 'score'
   37 |                     p=st[j].score;
      |                             ^~~~~