View Compilation Error

0_0_34345886_23996.cpp: In function 'int main()':
0_0_34345886_23996.cpp:41:2: error: 'll' was not declared in this scope
  ll i,j;
  ^
0_0_34345886_23996.cpp:46:7: error: 'i' was not declared in this scope
   for(i=0;i<=1001;i++)
       ^
0_0_34345886_23996.cpp:52:7: error: 'i' was not declared in this scope
   for(i=1;i<n;i++)
       ^
0_0_34345886_23996.cpp:54:7: error: expected ';' before 'u'
    ll u,v,w;
       ^
0_0_34345886_23996.cpp:55:22: error: 'u' was not declared in this scope
    scanf("%d %d %d",&u,&v,&w);
                      ^
0_0_34345886_23996.cpp:55:25: error: 'v' was not declared in this scope
    scanf("%d %d %d",&u,&v,&w);
                         ^
0_0_34345886_23996.cpp:55:28: error: 'w' was not declared in this scope
    scanf("%d %d %d",&u,&v,&w);
                            ^