View Compilation Error

0_0_7068523_3210.cpp: In member function `long long int SFX::cal(int)':
0_0_7068523_3210.cpp:54: error: `rl' undeclared (first use this function)
0_0_7068523_3210.cpp:54: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7068523_3210.cpp:54: error: expected `;' before ')' token
0_0_7068523_3210.cpp: In member function `void SFX::solve()':
0_0_7068523_3210.cpp:62: error: `len' undeclared (first use this function)
0_0_7068523_3210.cpp:69: error: `rl' undeclared (first use this function)