oj.uz

Submission #290956

# Submission time Handle Problem Language Result Execution time Memory
290956 2020-09-04T15:02:57 Z PeppaPig "The Lyuboyn" code (IZhO19_lyuboyn) C++14
19 / 100
 845 ms 18996 KB 
#include <bits/stdc++.h>

using namespace std;

int n, k, t, s;
mt19937 rng(time(NULL));

void print(int val) {
	vector<int> vec;
	for(int i = 0; i < n; i++, val >>= 1)
		vec.emplace_back(val & 1);
	reverse(vec.begin(), vec.end());
	for(int x : vec) printf("%d", x);
	printf("\n");
}

chrono::steady_clock::time_point start;

chrono::steady_clock::time_point get_now() {
	return chrono::steady_clock::now();
}

int elapsed() {
	return (int)chrono::duration_cast<chrono::milliseconds>(get_now() - start).count();
}

int main() {
	start = get_now();

	scanf("%d %d %d", &n, &k, &t);
	for(int i = 0; i < n; i++) {
		char c; scanf("%c", &c);
		s = (s << 1) + (c == '1');
	}

	vector<int> base;
	for(int i = 0; i < (1 << n); i++) if(__builtin_popcount(i) == k)
		base.emplace_back(i);

	while(elapsed() <= 500) {
		shuffle(base.begin(), base.end(), rng);

		vector<int> ans = {s};
		for(int j = 0; j < n; j++)
			for(int i = (int)ans.size() - 1; ~i; i--)
				ans.emplace_back(ans[i] ^ base[j]);

		set<int> st(ans.begin(), ans.end());
		if((int)st.size() == (1 << n)) {
			printf("%d\n", (1 << n));
			for(int x : ans) print(x);
			exit(0);
		}
	}
	printf("-1\n");

	return 0;
}

Compilation message

lyuboyn.cpp: In function 'int main()':
lyuboyn.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |  scanf("%d %d %d", &n, &k, &t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
lyuboyn.cpp:32:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   32 |   char c; scanf("%c", &c);
      |           ~~~~~^~~~~~~~~~

Subtask #1
0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 384 KB First number in answer is not x 1 2

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Ok

Subtask #3
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 500 ms 636 KB Ok
2 Correct 534 ms 7820 KB Ok
3 Correct 512 ms 4276 KB Ok
4 Correct 498 ms 380 KB Ok
5 Correct 495 ms 504 KB Ok
6 Correct 499 ms 504 KB Ok
7 Correct 502 ms 592 KB Ok
8 Correct 516 ms 4132 KB Ok

Subtask #4
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 664 ms 18792 KB Ok
2 Correct 300 ms 9456 KB Ok
3 Correct 2 ms 384 KB Ok
4 Correct 0 ms 256 KB Ok
5 Correct 1 ms 384 KB Ok

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Ok
2 Correct 16 ms 800 KB Ok
3 Incorrect 509 ms 4124 KB Output -1 while solution exists
4 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 845 ms 18996 KB First number in answer is not x 44202 88404
2 Halted 0 ms 0 KB -

Subtask #7
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 664 ms 18792 KB Ok
2 Correct 300 ms 9456 KB Ok
3 Correct 2 ms 384 KB Ok
4 Correct 0 ms 256 KB Ok
5 Correct 1 ms 384 KB Ok
6 Correct 1 ms 384 KB Ok
7 Correct 16 ms 800 KB Ok
8 Incorrect 509 ms 4124 KB Output -1 while solution exists
9 Halted 0 ms 0 KB -

Subtask #8
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 740 ms 9304 KB First number in answer is not x 92826 54580
2 Halted 0 ms 0 KB -