View Compilation Error

0_0_14737736_22004.cpp: In function 'long long int pollard_rho(long long int, long long int)':
0_0_14737736_22004.cpp:109:20: error: 'time' was not declared in this scope
     srand(time(NULL));
                    ^
0_0_14737736_22004.cpp: In function 'int main()':
0_0_14737736_22004.cpp:166:47: error: 'memset' was not declared in this scope
                 memset(factor,0,sizeof(factor));
                                               ^
0_0_14737736_22004.cpp:169:39: error: 'sort' was not declared in this scope
                 sort(factor,factor+tol);
                                       ^
0_0_14737736_22004.cpp:183:31: error: 'sort' was not declared in this scope
             sort(sm+1,sm+tot+1);
                               ^