Submission #389332

#	Time	Username	Problem	Language	Result	Execution time	Memory
389332		Kevin_Zhang_TW	Binary Subsequences (info1cup17_binary)	C++17	0 / 100	1090 ms	204 KiB

binary

#pragma GCC optimize("Ofast")

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif

const int MAX_N = 2010, MAX_W = 30, inf = MAX_N - 5, p = 1e9 + 7;

bool valid(int a, int b) {
	if (a == 0 && b == 0) return true;
	if (a < b) swap(a, b);
	a -= b + 1;
	if (a < 0) return false;
	return valid(a, b);
}
int cal(int a, int b, bool gen) {
	int res = 0, val = 0;
	while (a + b) {
		++res;
		if (a < b) {
			b -= a + 1;
			val = val<<1;
		}
		else {
			a -= b + 1;
			val = val<<1|1;
		}
	}
	if (gen) {
		for (int i = 0;i < res;++i)
			cout << (val>>i&1) << " \n"[i+1==res];
	}
	return res;
}

int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int T;
	cin >> T;

	while (T--) {
		int k;
		cin >> k;

		int cnt = 0;
		int need = inf, ind = -1;

		for (int i = 0;i <= k;++i) {
			if (valid(i, k - i)) 
				++cnt;
			if (chmin(need, cal(i, k - i, false)))
				ind = i;
		}
		cout << cnt << '\n';

		cal(ind, k - ind, true);

	}
}

• Subtask 1: 0 / 43
• Subtask 2: 0 / 39
• Subtask 3: 0 / 18