mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
7a2a9109f5
2600-2699
85 lines
1.6 KiB
C++
85 lines
1.6 KiB
C++
#include<iostream>
|
|
#include<cstring>
|
|
#include<cstdio>
|
|
#include<algorithm>
|
|
#include<vector>
|
|
#include<cmath>
|
|
using namespace std;
|
|
int a[1001];
|
|
int n,p,len,tmp;
|
|
struct node {
|
|
int num;
|
|
int pos;
|
|
};
|
|
node tree[1001];
|
|
bool cmp(const node& x,const node& y)
|
|
{
|
|
if(x.num!=y.num)
|
|
return x.num<y.num;
|
|
else
|
|
return x.pos<y.pos;
|
|
}
|
|
void print(int x)
|
|
{
|
|
int i;
|
|
for(i=0;i<x-1;i++)
|
|
printf("%d ",a[i]);
|
|
printf("%d\n",a[i]);
|
|
}
|
|
bool dfs(int deep,int pos,int pp)
|
|
{
|
|
int pre,i;
|
|
bool flag=false;
|
|
if(deep == len)
|
|
{
|
|
tmp++;
|
|
print(deep);
|
|
if(tmp == p)
|
|
return true;
|
|
return false;
|
|
}
|
|
if(pos>n)
|
|
return false;
|
|
for(i=pos;i<n;i++)
|
|
{
|
|
if(tree[i].pos > pp )
|
|
{
|
|
if(!flag)
|
|
{
|
|
pre=tree[i].num;
|
|
flag=true;
|
|
}
|
|
else if(pre == tree[i].num)
|
|
continue;
|
|
pre=tree[i].num;
|
|
a[deep]=tree[i].num;
|
|
if(dfs(deep+1,i+1,tree[i].pos))
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
int main()
|
|
{
|
|
while(~scanf("%d%d",&n,&p))
|
|
{
|
|
int tc;
|
|
for(int i=0;i<n;i++)
|
|
{
|
|
scanf("%d",&tc);
|
|
tree[i].num=tc;
|
|
tree[i].pos=i;
|
|
}
|
|
sort(tree,tree+n,cmp);
|
|
tmp=0;
|
|
for(int i=1;i<n;i++)
|
|
{
|
|
len=i;
|
|
if(dfs(0,0,-1))
|
|
break;
|
|
}
|
|
printf("\n");
|
|
}
|
|
return 0;
|
|
}
|