Submission #287949

#	Time	Username	Problem	Language	Result	Execution time	Memory
287949		bensonlzl	"The Lyuboyn" code (IZhO19_lyuboyn)	C++14	100 / 100	223 ms	15984 KiB

lyuboyn

#include <bits/stdc++.h>

using namespace std;

mt19937 rng(1351273);

int N, K, T, S;
string st;
int usable[1000005];
vector<int> kdiff, ans;

void dfs(int x){
	usable[x] = 0;
	ans.push_back(x);
	for (auto it : kdiff){
		if (usable[x ^ it]){
			dfs(x ^ it);
			return;
		}
	}
}

string intToString(int x){
	string r;
	for (int i = 0; i < N; ++i){
		r = ((x & (1 << i)) ? '1' : '0') + r;
	}
	return r;
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin >> N >> K >> T;
	cin >> st;
	for (int i = 0; i < (int) st.size(); ++i){
		S *= 2;
		S += (int) (st[i]-'0');
	}
	for (int i = 0; i < (1 << N); ++i){
		if (__builtin_popcount(i) == K){
			kdiff.push_back(i);
		}
		usable[i] = 1;
	}
	shuffle(kdiff.begin(),kdiff.end(),rng);
	dfs(S);
	if ((int) ans.size() != (1 << N)){
		cout << -1 << '\n';
	}
	else{
		cout << (1 << N) << '\n';
		for (auto it : ans){
			cout << intToString(it) << '\n';
		}
	}
}

• Subtask 1: 0 / 0
• Subtask 2: 5 / 5
• Subtask 3: 3 / 3
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 18 / 18
• Subtask 7: 31 / 31
• Subtask 8: 17 / 17