View Compilation Error

0_0_7068863_9575.cpp: In member function `long long int SFX::cal(int)':
0_0_7068863_9575.cpp:51: error: `rl' undeclared (first use this function)
0_0_7068863_9575.cpp:51: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7068863_9575.cpp: In member function `void SFX::init0(int)':
0_0_7068863_9575.cpp:58: error: `i' undeclared (first use this function)
0_0_7068863_9575.cpp: In member function `void SFX::solve()':
0_0_7068863_9575.cpp:71: error: `len' undeclared (first use this function)
0_0_7068863_9575.cpp:78: error: `rl' undeclared (first use this function)