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View Compilation Error

0_0_19707107_20576.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include <cstdio>  
         ^
0_0_19707107_20576.cpp:4:6: error: expected nested-name-specifier before '&' token
 using namespace std;  
      ^
0_0_19707107_20576.cpp:4:21: error: expected identifier before '&' token
 using namespace std;  
                     ^
0_0_19707107_20576.cpp:4:26: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;  
                          ^
0_0_19707107_20576.cpp:4:27: error: 'std' does not name a type
 using namespace std;  
                           ^
0_0_19707107_20576.cpp:4:36: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;  
                                    ^
0_0_19707107_20576.cpp:4:42: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;  
                                          ^
0_0_19707107_20576.cpp:5:7: error: 'nbsp' declared as reference but not initialized
 const int N=21;  
       ^
0_0_19707107_20576.cpp:5:16: error: conflicting declaration 'int& nbsp'
 const int N=21;  
                ^
0_0_19707107_20576.cpp:5:7: note: previous declaration as 'const int& nbsp'
 const int N=21;  
       ^
0_0_19707107_20576.cpp:5:21: error: 'N' does not name a type
 const int N=21;  
                     ^
0_0_19707107_20576.cpp:5:31: error: expected constructor, destructor, or type conversion before ';' token
 const int N=21;  
                               ^
0_0_19707107_20576.cpp:5:37: error: expected constructor, destructor, or type conversion before ';' token
 const int N=21;  
                                     ^
0_0_19707107_20576.cpp:6:5: error: conflicting declaration 'int& nbsp'
 int n,tot,b[18000],a[N][N];  
     ^
0_0_19707107_20576.cpp:5:7: note: previous declaration as 'const int& nbsp'
 const int N=21;  
       ^
0_0_19707107_20576.cpp:6:10: error: 'n' does not name a type
 int n,tot,b[18000],a[N][N];  
          ^
0_0_19707107_20576.cpp:6:38: error: expected constructor, destructor, or type conversion before ';' token
 int n,tot,b[18000],a[N][N];  
                                      ^
0_0_19707107_20576.cpp:6:44: error: expected constructor, destructor, or type conversion before ';' token
 int n,tot,b[18000],a[N][N];  
                                            ^
0_0_19707107_20576.cpp:7:5: error: conflicting declaration 'int& nbsp'
 int f[N][1<<20];  
     ^
0_0_19707107_20576.cpp:5:7: note: previous declaration as 'const int& nbsp'
 const int N=21;  
       ^
0_0_19707107_20576.cpp:7:10: error: 'f' does not name a type
 int f[N][1<<20];  
          ^
0_0_19707107_20576.cpp:7:27: error: expected constructor, destructor, or type conversion before ';' token
 int f[N][1<<20];  
                           ^
0_0_19707107_20576.cpp:7:33: error: expected constructor, destructor, or type conversion before ';' token
 int f[N][1<<20];  
                                 ^
0_0_19707107_20576.cpp:8:6: error: cannot declare reference to 'void'
 void pre()  
      ^
0_0_19707107_20576.cpp:8:6: error: variable or field 'nbsp' declared void
0_0_19707107_20576.cpp:8:17: error: expected constructor, destructor, or type conversion before 'nbsp'
 void pre()  
                 ^
0_0_19707107_20576.cpp:8:27: error: expected constructor, destructor, or type conversion before ';' token
 void pre()  
                           ^
0_0_19707107_20576.cpp:9:1: error: expected unqualified-id before '{' token
 {  
 ^


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