View Compilation Error

0_0_11447288_1468.cpp: In function `void init()':
0_0_11447288_1468.cpp:21: error: `pow' undeclared (first use this function)
0_0_11447288_1468.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11447288_1468.cpp: In function `long long int solve(int)':
0_0_11447288_1468.cpp:48: error: `pow' undeclared (first use this function)