算法答案：
public class Find {
public static void main(String[] args) {
int data[] = {1,2,3,4,5,6,8,10};
int k = 2;
int m = 7;
List<List<Integer>> data1 = findData(data, k, m);
System.out.println(1);
}
private static List<List<Integer>> findData(int[] data, int k, int m) {
List<List<Integer>> res = new ArrayList<>();
findRes(data, k, m, 0, new ArrayList<>(), res);
return res;
}
private static void findRes(int[] data, int k, int m, int start, List<Integer>
currentCom, List<List<Integer>> res){
// 判断不为0
if(k == 0 && m == 0){
res.add(new ArrayList<>(currentCom));
return;
}
if(k<=0 || m<=0 || start >= data.length){
return;
}
for(int i= start; i<data.length; i++){
currentCom.add(data[i]);
findRes(data,k-1,m-data[i],i+1,currentCom,res);
currentCom.remove(currentCom.size() -1);
}
}
}
