View Compilation Error

0_0_8827715_32349.cpp: In function `void bozhong(ll&, int, int)':
0_0_8827715_32349.cpp:28: error: `tm' undeclared (first use this function)
0_0_8827715_32349.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8827715_32349.cpp: In function `ll solve(int)':
0_0_8827715_32349.cpp:58: error: `tm' undeclared (first use this function)
0_0_8827715_32349.cpp: In function `int main()':
0_0_8827715_32349.cpp:86: error: `tm' undeclared (first use this function)