4-12-1

#include<stdio.h>

int main(void)

{

         int child,men,women;

 

         for(men=0;men<=45;men++)

                   for(women=0;women<=45;women++)

                            for(child=0;child<=45;child++)

                                     if(men+women+child==45&&men*3+women*2+child*0.5==45)

                                               printf("men=%d,women=%d,child=%d\n",men,women,child);

 

                                     return 0;

}