View Compilation Error

0_0_7830058_4599.cpp: In function `void solve()':
0_0_7830058_4599.cpp:27: error: `tm' undeclared (first use this function)
0_0_7830058_4599.cpp:27: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7830058_4599.cpp: In function `int main()':
0_0_7830058_4599.cpp:59: error: `tm' undeclared (first use this function)