View Compilation Error

0_0_22769808_6503.cpp:1:2: error: invalid preprocessing directive #includeusingnamespace
 #includeusingnamespace std;
  ^
0_0_22769808_6503.cpp: In function 'int main()':
0_0_22769808_6503.cpp:13:5: error: 'cin' was not declared in this scope
     cin>>t;
     ^
0_0_22769808_6503.cpp:21:31: error: 'memset' was not declared in this scope
         memset(dp,0,sizeof(dp));for(i=1;i<=n;i++)
                               ^
0_0_22769808_6503.cpp:30:9: error: 'cout' was not declared in this scope
         cout<endl;
         ^
0_0_22769808_6503.cpp:30:14: error: 'endl' was not declared in this scope
         cout<endl;
              ^
0_0_22769808_6503.cpp:32:5: error: 'return0' was not declared in this scope
     return0;
     ^