Job 13033

Compiler output

prog.cpp: In function 'int main()':
prog.cpp:11:26: error: 'sqrt' was not declared in this scope
  int x = ceil((sqrt(delta) - 1) / 2);
                          ^
prog.cpp:11:36: error: 'ceil' was not declared in this scope
  int x = ceil((sqrt(delta) - 1) / 2);
                                    ^