Submission #515274

#	Time	Username	Problem	Language	Result	Execution time	Memory
515274		Mazaalai	Longest beautiful sequence (IZhO17_subsequence)	C++17	7 / 100	8 ms	332 KiB

subsequence

#include <bits/stdc++.h>
#define pb push_back
using namespace std;

const int N = 1e5+1;
int n;
int nums[N], bits[N];
int bitCnt(int a) {
	return bitset <20>(a).count();
}
signed main() {
	// freopen("in.txt", "r", stdin);
	// freopen("out.txt", "w", stdout);
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin >> n;

	vector <int> ans;
	for (int i = 0; i < n; i++) cin >> nums[i];
	for (int i = 0; i < n; i++) cin >> bits[i];
	for (int i = 0; i < (1<<n); i++) {
		vector <int> cur;
		for (int j = 0; j < n; j++) 
			if (i & (1<<j)) cur.pb(j);
		
		bool pos = 1;
		for (int j = 1; j < cur.size(); j++) {
			pos &= bitCnt(nums[cur[j-1]]&nums[cur[j]]) == bits[cur[j]];
		}
		if (pos && cur.size() > ans.size()) ans = cur;
	}
	cout << ans.size() << "\n";
	for (auto el : ans) cout << el+1 << ' '; cout << '\n';
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:28:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   for (int j = 1; j < cur.size(); j++) {
      |                   ~~^~~~~~~~~~~~
subsequence.cpp:34:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   34 |  for (auto el : ans) cout << el+1 << ' '; cout << '\n';
      |  ^~~
subsequence.cpp:34:43: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   34 |  for (auto el : ans) cout << el+1 << ' '; cout << '\n';
      |                                           ^~~~

• Subtask 1: 7 / 7
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 60