View Compilation Error

0_0_10464936_3919.cpp: In function `void slove(int, int, int)':
0_0_10464936_3919.cpp:21: error: `k' undeclared (first use this function)
0_0_10464936_3919.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10464936_3919.cpp:23: error: `ans' undeclared (first use this function)