View Compilation Error

0_0_27888884_26781.cpp: In function 'void place(int&, int&, int&, int&, int&, int, int, int)':
0_0_27888884_26781.cpp:102:26: error: 'sqrt' was not declared in this scope
     c4=((i-1)/(int)sqrt(N)*(int)sqrt(N)+(j-1)/(int)sqrt(N))*N+k+N*N*3;
                          ^