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View Compilation Error

0_0_20446365_28414.cpp:3:7: error: 'nbsp' declared as reference but not initialized
 const int maxn = 20000;  
       ^
0_0_20446365_28414.cpp:3:16: error: conflicting declaration 'int& nbsp'
 const int maxn = 20000;  
                ^
0_0_20446365_28414.cpp:3:7: note: previous declaration as 'const int& nbsp'
 const int maxn = 20000;  
       ^
0_0_20446365_28414.cpp:3:21: error: 'maxn' does not name a type
 const int maxn = 20000;  
                     ^
0_0_20446365_28414.cpp:3:31: error: expected unqualified-id before '=' token
 const int maxn = 20000;  
                               ^
0_0_20446365_28414.cpp:3:38: error: expected unqualified-id before numeric constant
 const int maxn = 20000;  
                                      ^
0_0_20446365_28414.cpp:3:49: error: expected constructor, destructor, or type conversion before ';' token
 const int maxn = 20000;  
                                                 ^
0_0_20446365_28414.cpp:3:55: error: expected constructor, destructor, or type conversion before ';' token
 const int maxn = 20000;  
                                                       ^
0_0_20446365_28414.cpp:4:6: error: expected nested-name-specifier before '&' token
 using namespace std;  
      ^
0_0_20446365_28414.cpp:4:21: error: expected identifier before '&' token
 using namespace std;  
                     ^
0_0_20446365_28414.cpp:4:26: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;  
                          ^
0_0_20446365_28414.cpp:4:27: error: 'std' does not name a type
 using namespace std;  
                           ^
0_0_20446365_28414.cpp:4:36: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;  
                                    ^
0_0_20446365_28414.cpp:4:42: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;  
                                          ^
0_0_20446365_28414.cpp:5:5: error: conflicting declaration 'int& nbsp'
 int a[maxn];  
     ^
0_0_20446365_28414.cpp:3:7: note: previous declaration as 'const int& nbsp'
 const int maxn = 20000;  
       ^
0_0_20446365_28414.cpp:5:10: error: 'a' does not name a type
 int a[maxn];  
          ^
0_0_20446365_28414.cpp:5:23: error: expected constructor, destructor, or type conversion before ';' token
 int a[maxn];  
                       ^
0_0_20446365_28414.cpp:5:29: error: expected constructor, destructor, or type conversion before ';' token
 int a[maxn];  
                             ^
0_0_20446365_28414.cpp:6:5: error: conflicting declaration 'int& nbsp'
 int main()  
     ^
0_0_20446365_28414.cpp:3:7: note: previous declaration as 'const int& nbsp'
 const int maxn = 20000;  
       ^
0_0_20446365_28414.cpp:6:17: error: expected constructor, destructor, or type conversion before 'nbsp'
 int main()  
                 ^
0_0_20446365_28414.cpp:6:27: error: expected constructor, destructor, or type conversion before ';' token
 int main()  
                           ^
0_0_20446365_28414.cpp:7:1: error: expected unqualified-id before '{' token
 {  
 ^


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