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DSA02045 - TẬP CON CỦA XÂU KÝ TỰ.cpp
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DSA02045 - TẬP CON CỦA XÂU KÝ TỰ.cpp
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#include<bits/stdc++.h>
#define mod 1000000007
#define ll long long
#define p(x) pair<x,x>
#define v(x) vector<x>
#define tree node*
#define sz(a) a.size()
#define f first
#define s second
#define pb(a) push_back(a)
#define pf(a) push_front(a)
#define FOR(i,l,r) for(int i=l;i<r;i++)
#define FORX(i,l,r,x) for(int i=l;i<r;i+=x)
#define FORD(i,l,r) for(int i=l;i>=r;i--)
#define correct(x,y,n,m) 0<=(x)&&(x)<(n)&&0<=(y)&&(y)<(m)
#define cin(M,n) FOR(i,0,n)cin>>M[i]
#define cout(M,n) FOR(i,0,n)cout<<M[i]
#define rs(M,x) memset(M,x,sizeof(M))
#define reset() FOR(i, 0, 1001)A[i].clear(),check[i]=false
#define faster() cin.tie(0); ios_base::sync_with_stdio(false); cout.tie(0);
#define run() int t; cin >> t; while (t--)
#define pq(x) priority_queue<x>
#define neg_pq(x) priority_queue<x, vector<x>, greater<x>>
#define all(M) M.begin(),M.end()
using namespace std;
//_______________________NGUYỄN_NGỌC_TOÀN_______________________//
int n;
string s;
v(string) res;
void Try(string f, int i) {
if(sz(f))
res.pb(f);
FOR(j, i, n)Try(f + s[j], j+1);
}
int main() {
faster();
run() {
res.clear();
cin >> n >> s;
Try("", 0);
sort(all(res));
for (auto s : res)cout << s << " ";
cout << endl;
}
}
//__________________________B20DCPT173__________________________//