Run id: 4471

Main.cc: In function 'int main()':
Main.cc:13:13: error: 'sqrt' was not declared in this scope
  if(i>sqrt(n)||w!=0){ 
             ^
Main.cc:5:16: warning: unused variable 'r' [-Wunused-variable]
  int n,w=0,i=2,r;
                ^