View Compilation Error

0_0_21265115_31481.cpp: In function 'int main(int, const char**)':
0_0_21265115_31481.cpp:27:13: error: 'LL' was not declared in this scope
         for(LL i = 1; i <= n; i++)  
             ^
0_0_21265115_31481.cpp:28:24: error: expected ';' before 'j'
                 for(LL j = 0; j <= i; j++)  
                        ^
0_0_21265115_31481.cpp: At global scope:
0_0_21265115_31481.cpp:42:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_21265115_31481.cpp:43:1: error: expected declaration before '}' token
 }
 ^