View Compilation Error

0_0_17302439_2680.cpp:29:13: error: redefinition of 'std::bitset<501ull> bt1'
 bitset<501> bt1, bt2;
             ^
0_0_17302439_2680.cpp:28:13: note: 'std::bitset<501ull> bt1' previously defined here
 bitset<501> bt1, bt2;
             ^
0_0_17302439_2680.cpp:29:18: error: redefinition of 'std::bitset<501ull> bt2'
 bitset<501> bt1, bt2;
                  ^
0_0_17302439_2680.cpp:28:18: note: 'std::bitset<501ull> bt2' previously defined here
 bitset<501> bt1, bt2;
                  ^