View Compilation Error

0_0_28700929_22989.cpp: In function 'int main()':
0_0_28700929_22989.cpp:54:43: error: 'min' was not declared in this scope
                     ans=min(ans,Abs(i*i-n));
                                           ^
0_0_28700929_22989.cpp:61:43: error: 'min' was not declared in this scope
                     ans=min(ans,Abs(j*j-n));
                                           ^