蓝桥杯 手链样式 next_permutation

#include
#include
#include
#include
#include
using namespace std;
string reco[30000];
int main(){
	int res=0;
	string str="aaabbbbccccc";
	string str2;
	int i;
	int lenth=str.length();
	int flag=0;
          	str2=str;
			str2+=str2;
			reco[res*2]=str2;
			reverse(str2.begin(),str2.end());
			reco[res*2+1]=str2;
			res++;
	while(next_permutation(str.begin(),str.end())){
		flag=1;
		for(i=0;i