제출 #370487

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
370487		fhvirus	"The Lyuboyn" code (IZhO19_lyuboyn)	C++17	19 / 100	268 ms	7588 KiB

lyuboyn

// Knapsack DP is harder than FFT.
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii; typedef pair<ll, ll> pll;
#define ff first
#define ss second
#define pb emplace_back
#define FOR(i,n) for(int i = 0; i < (n); ++i)
#define FOO(i,a,b) for(int i = (a); i <= (b); ++i)
#define AI(x) (x).begin(),(x).end()
template<typename I> bool chmax(I &a, I b){ return a < b ? (a = b, true) : false;}
template<typename I> bool chmin(I &a, I b){ return a > b ? (a = b, true) : false;}
#ifdef OWO
#define debug(args...) LKJ("[ " + string(#args) + " ]", args)
void LKJ(){ cerr << endl;}
template<typename I, typename...T> void LKJ(I&&x, T&&...t){ cerr<<x<<", ", LKJ(t...);}
template<typename I> void DE(I a, I b){ while(a < b) cerr<<*a<<" \n"[next(a)==b], ++a;}
#else
#define debug(...) 0
#define DE(...) 0
#endif

void printb(vector<int> v){
	int n = __lg(v.size());
	cout << v.size() << '\n';
	for(auto i: v){
		for(int j = n - 1; j >= 0; --j)
			cout << ((i & (1<<j)) ? 1 : 0);
		cout << '\n';
	}
}
vector<int> solvek1(int n){
	vector<int> ans = {0, 1};
	FOO(i,2,n){
		vector<int> b = ans;
		reverse(AI(b));
		for(auto &j: b) j += (1<<(i-1));
		for(auto j: b) ans.pb(j);
	}
	return ans;
}
vector<int> addk(int k, int n, vector<int> v){
	vector<int> h = solvek1(k);
	vector<int> ans;
	int msk = (((1<<k)-1) << n);
	FOR(st, h.size()){
		FOR(x, v.size()){
			int id = st + x; if(id > v.size()) id -= v.size();
			int i = v[id];
			i ^= (h[st]<<n);
			if(x & 1) i ^= msk;
			ans.pb(i);
		}
	}
	return ans;
}

int n, k, t, s;

int32_t main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> k >> t >> s;
	if(k % 2 == 0 or k >= n){
		puts("-1");
		return 0;
	}
	if(k == 1 and s == 0){
		vector<int> ans = solvek1(n);
		printb(ans);
		return 0;
	}
	vector<int> ans = solvek1(n - k + 1);
	ans = addk(k - 1, n - k + 1, ans);
	printb(ans);
	return 0;
	if(k == 3 and s == 0){
		n -= 2;
		vector<int> ans = solvek1(n);
		cout << ans.size() * 4 << '\n';
		const int d[4] = {0, 1, 3, 2};
		for(int st = 0; st < 4; ++st){
			for(int x = 0; x < ans.size(); ++x){
				int i = ans[(st + x) % ans.size()];
				i ^= d[st] << n;
				if(x & 1) i ^= 3 << n;
				for(int j = n + 1; j >= 0; --j)
					cout << ((i & (1<<j)) ? 1 : 0);
				cout << '\n';
			}
		}
		return 0;
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

lyuboyn.cpp: In function 'std::vector<int> addk(int, int, std::vector<int>)':
lyuboyn.cpp:9:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | #define FOR(i,n) for(int i = 0; i < (n); ++i)
      |                                   ^
lyuboyn.cpp:47:2: note: in expansion of macro 'FOR'
   47 |  FOR(st, h.size()){
      |  ^~~
lyuboyn.cpp:9:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | #define FOR(i,n) for(int i = 0; i < (n); ++i)
      |                                   ^
lyuboyn.cpp:48:3: note: in expansion of macro 'FOR'
   48 |   FOR(x, v.size()){
      |   ^~~
lyuboyn.cpp:49:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |    int id = st + x; if(id > v.size()) id -= v.size();
      |                        ~~~^~~~~~~~~~
lyuboyn.cpp: In function 'int32_t main()':
lyuboyn.cpp:83:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |    for(int x = 0; x < ans.size(); ++x){
      |                   ~~^~~~~~~~~~~~

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