View Compilation Error

0_0_4545818_24261.cpp:43: error: `ll' does not name a type
0_0_4545818_24261.cpp: In function `int main()':
0_0_4545818_24261.cpp:51: error: `n' undeclared (first use this function)
0_0_4545818_24261.cpp:51: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4545818_24261.cpp:51: error: `k' undeclared (first use this function)