POJ 2245

按字典序选一个六组合。简单DFS

#include <iostream>
#include <cstdio>
#include <cstring>

using namespace std;

int se[20];
int ans[20];

void dfs(int ps,int position,int k){
	if(position>k){
		if(ps==6){
			printf("%d",ans[1]);
			for(int i=2;i<=6;i++)
			printf(" %d",ans[i]);
			printf("\n");
		}
		return ;
	}
	ans[ps+1]=se[position];
	dfs(ps+1,position+1,k);
	dfs(ps,position+1,k);
}

int main(){
	int k;
	while(scanf("%d",&k),k){
		for(int i=1;i<=k;i++)
		scanf("%d",&se[i]);
		dfs(0,1,k);
		printf("\n");
	}
	return 0;
}