朴素解法
public class Main{
public static void main(String[] args){ Scanner sc = new Scanner(System.in);
int x = sc.nextInt();
int a=0;
int b=0;
int c=0;
for(a=0;a<=20;a++){
for(b=0;b<=33;b++){
for(c=0;c<=100;c+=3){
if(a*5+b*3+c/3==100 && a+b+c==100){
System.out.println(a+" "+b+" "+c);
}
}
}
}
}
}