oj.uz

Submission #442870

# Submission time Handle Problem Language Result Execution time Memory
442870 2021-07-09T10:08:22 Z jesus_coconut Teleporters (IOI08_teleporters) C++17
50 / 100
 1000 ms 62924 KB 
#include <bits/stdc++.h>
#define all(a) begin(a), end(a)
#define S second
#define F first
using namespace std;

void cc(vector<pair<int, int>> &v) {
	vector<int> tmp;
	for (auto &[a, b] : v) {
		tmp.push_back(a);
		tmp.push_back(b);
	}
	sort(all(tmp));
	tmp.erase(unique(all(tmp)), end(tmp));
	for (auto &[a, b] : v) {
		a = lower_bound(all(tmp), a) - begin(tmp);
		b = lower_bound(all(tmp), b) - begin(tmp);
	}
}

int const N = 1000005;

bool bio[N];
vector<int> len;

vector<int> nxt;
void findcyc(int ver, int l, int tar) {
	bio[ver] = true;
	if (ver == tar) {
		len.push_back(l);
		return;
	}
	findcyc(nxt[ver], l + 1, tar);
}

void solve() {
	int n, m;
	cin >> n >> m;
	nxt.resize(2 * n);
	vector<pair<int, int>> v;
	for (int i = 0; i < n; ++i) {
		int a, b;
		cin >> a >> b;
		v.emplace_back(a, b);
		v.emplace_back(b, a);
	}
	sort(all(v));
	cc(v);
	for (int i = 0; i < 2 * n; ++i) {
		nxt[i] = (v[i].S + 1) % (2 * n);
	}
	for (int i = 0; i < 2 * n; ++i) {
		if (!bio[nxt[i]]) {
			findcyc(nxt[i], 1, i);
		}
	}
	sort(begin(len) + 1, end(len), greater<>());
	int ans = len[0];
	int i = 1;
	for (; i <= m; ++i) {
		if (len[i] > 0) {
			ans += len[i] + 2;
		} else break;
	}
	int lft = m + 1 - i;
	if (lft % 2 == 1) {
		ans++;
		lft--;
	}
	ans += 2 * lft;
	cout << ans << '\n';
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);

	solve();

	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 324 KB Output isn't correct

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 304 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 460 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 588 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 14 ms 1096 KB Output isn't correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 1688 KB Output is correct

Subtask #16
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 124 ms 7968 KB Output is correct
2 Correct 334 ms 23924 KB Output is correct

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 243 ms 14360 KB Output is correct
2 Correct 574 ms 29600 KB Output is correct

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 600 ms 48592 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 954 ms 58360 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1018 ms 62924 KB Time limit exceeded
2 Halted 0 ms 0 KB -