View Compilation Error

0_0_30767072_4215.cpp: In function 'int main()':
0_0_30767072_4215.cpp:28:27: error: 'pow' was not declared in this scope
    sa += pow(10, count - j)*t;
                           ^
0_0_30767072_4215.cpp:47:27: error: 'pow' was not declared in this scope
    sb += pow(10, count - j)*t;
                           ^