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Submission #290991

# Submission time Handle Problem Language Result Execution time Memory
290991 2020-09-04T15:17:21 Z PeppaPig "The Lyuboyn" code (IZhO19_lyuboyn) C++14
34 / 100
 1000 ms 19032 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();

	char input[100];
	scanf("%d %d %d %s", &n, &k, &t, input);
	for(int i = 0; input[i] != '\0'; i++)
		s = (s << 1) + (input[i] == '1');

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

	while(true) {
		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);
		}
		if(elapsed() >= 750) break;
	}
	printf("-1\n");

	return 0;
}

Compilation message

lyuboyn.cpp: In function 'int main()':
lyuboyn.cpp:31:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |  scanf("%d %d %d %s", &n, &k, &t, input);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Ok

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Ok

Subtask #3
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 748 ms 632 KB Ok
2 Correct 736 ms 7660 KB Ok
3 Correct 770 ms 4060 KB Ok
4 Correct 747 ms 360 KB Ok
5 Correct 739 ms 504 KB Ok
6 Correct 742 ms 504 KB Ok
7 Correct 743 ms 728 KB Ok
8 Correct 761 ms 4204 KB Ok

Subtask #4
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 678 ms 18668 KB Ok
2 Correct 294 ms 9324 KB Ok
3 Correct 2 ms 384 KB Ok
4 Correct 1 ms 256 KB Ok
5 Correct 1 ms 384 KB Ok

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Ok
2 Correct 18 ms 832 KB Ok
3 Correct 307 ms 9456 KB Ok
4 Correct 169 ms 4836 KB Ok
5 Correct 1 ms 384 KB Ok
6 Correct 4 ms 384 KB Ok
7 Correct 68 ms 2552 KB Ok
8 Correct 1 ms 384 KB Ok

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 696 ms 18780 KB Ok
2 Correct 991 ms 18688 KB Ok
3 Incorrect 754 ms 7736 KB Output -1 while solution exists
4 Halted 0 ms 0 KB -

Subtask #7
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 678 ms 18668 KB Ok
2 Correct 294 ms 9324 KB Ok
3 Correct 2 ms 384 KB Ok
4 Correct 1 ms 256 KB Ok
5 Correct 1 ms 384 KB Ok
6 Correct 1 ms 384 KB Ok
7 Correct 18 ms 832 KB Ok
8 Correct 307 ms 9456 KB Ok
9 Correct 169 ms 4836 KB Ok
10 Correct 1 ms 384 KB Ok
11 Correct 4 ms 384 KB Ok
12 Correct 68 ms 2552 KB Ok
13 Correct 1 ms 384 KB Ok
14 Correct 696 ms 18780 KB Ok
15 Correct 991 ms 18688 KB Ok
16 Incorrect 754 ms 7736 KB Output -1 while solution exists
17 Halted 0 ms 0 KB -

Subtask #8
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 712 ms 9400 KB Ok
2 Correct 683 ms 19032 KB Ok
3 Execution timed out 1040 ms 18824 KB Time limit exceeded
4 Halted 0 ms 0 KB -