/in/foo.cc:6:12: error: '__int64' does not name a type
 #define LL __int64  
            ^
/in/foo.cc:7:1: note: in expansion of macro 'LL'
 LL a[300100] , sum[300100];  
 ^~
/in/foo.cc:6:12: error: '__int64' does not name a type
 #define LL __int64  
            ^
/in/foo.cc:8:1: note: in expansion of macro 'LL'
 LL dp[5010][5010] ;  
 ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:6:12: error: '__int64' was not declared in this scope
 #define LL __int64  
            ^
/in/foo.cc:11:5: note: in expansion of macro 'LL'
     LL max1 ;  
     ^~
/in/foo.cc:13:9: error: 'sum' was not declared in this scope
         sum[0] = 0 ;  
         ^~~
/in/foo.cc:15:29: error: 'a' was not declared in this scope
             scanf("%I64d", &a[i]) ;  
                             ^
/in/foo.cc:18:14: error: 'a' was not declared in this scope
         sort(a+1,a+n+1) ;  
              ^
/in/foo.cc:23:16: error: 'dp' was not declared in this scope
         memset(dp,0,sizeof(dp)) ;  
                ^~