View Compilation Error

0_0_36480476_19662.cpp:4:17: error: '__gnu_std' is not a namespace-name
 using namespace __gnu_std;
                 ^
0_0_36480476_19662.cpp:4:26: error: expected namespace-name before ';' token
 using namespace __gnu_std;
                          ^
0_0_36480476_19662.cpp: In function 'void init()':
0_0_36480476_19662.cpp:40:36: error: 'd' was not declared in this scope
                 dp[i][j]=(dp[i][j]+d[i-1][j^k])%modulo;
                                    ^