求数值在 1 - 50 之内的任意5个数之和为100 。数值：1,2,3,4,5,6....48,49,50,取其中的任意5个数，但这5个数相加之和要等于100，并将所有这种组合罗列.

/** * 求数值在 1 - 50 之内的任意5个数之和为100 。 * 数值：1,2,3,4,5,6....48,49,50 * 取其中的任意5个数，但这5个数相加之和要等于100，并将所有这种组合罗列 * 例： 1+10+19+20+50=100 *      3+14+16+27+40=100 */    import java.util.*;

public class TotalList {    private LinkedList list = new LinkedList();    private void TotalEqual100(int begin,int end) {        for (int i1 = begin; i1 <= end; i1++) {            for (int i2 = i1 + 1; i2 <= end; i2++) {                for (int i3 = i2 + 1; i3 <= end; i3++) {                    for (int i4 = i3 + 1; i4 <=end; i4++) {                        for (int i5 = i4 + 1; i5 <= end; i5++) {                            int count = i1+i2+i3+i4+i5;                            String str = String.valueOf(i1)+"+"+i2+"+"+i3+"+"+i4+"+"+i5;                            if(count == 100)                            {                                str+="="+count;                                if(!list.contains(str))                                {                                    list.add(str);                                }                            }                        }                    }                }            }        }    }    private void display()    {       Iterator it = list.iterator();       while(it.hasNext())       {           System.out.println(it.next());       }    }    public static void main(String[] args) {        TotalList tl = new TotalList();        tl.TotalEqual100(1,50);        tl.display();        System.out.println(tl.list.size());    }

}