View Compilation Error

1_645_2887_20799.cpp: In function 'll solve()':
1_645_2887_20799.cpp:66:27: error: expected primary-expression at end of input
                     step[i%
                           ^
1_645_2887_20799.cpp:66:27: error: expected ']' at end of input
1_645_2887_20799.cpp:66:27: error: expected '}' at end of input
1_645_2887_20799.cpp:66:27: error: expected '}' at end of input
1_645_2887_20799.cpp:66:27: error: expected '}' at end of input
1_645_2887_20799.cpp:66:27: error: expected '}' at end of input
1_645_2887_20799.cpp:66:27: error: expected '}' at end of input