View Compilation Error

0_0_8779967_12092.cpp: In function `void solve1(int, int, int, int)':
0_0_8779967_12092.cpp:28: error: `tm' undeclared (first use this function)
0_0_8779967_12092.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8779967_12092.cpp: In function `void solve2(int, int, int, int)':
0_0_8779967_12092.cpp:57: error: `tm' undeclared (first use this function)