#include <bits/stdc++.h>
using namespace std;
#ifdef tabr
#include "library/debug.cpp"
#else
#define debug(...)
#endif
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n, m;
cin >> n >> m;
vector<pair<int, int>> a(n);
vector<int> b(2 * n);
for (int i = 0; i < n; i++) {
cin >> a[i].first >> a[i].second;
b[2 * i] = a[i].first;
b[2 * i + 1] = a[i].second;
}
sort(a.begin(), a.end());
sort(b.begin(), b.end());
for (int i = 0; i < n; i++) {
a[i].first = (int) (lower_bound(b.begin(), b.end(), a[i].first) - b.begin());
a[i].second = (int) (lower_bound(b.begin(), b.end(), a[i].second) - b.begin());
}
vector<int> c(2 * n);
for (int i = 0; i < n; i++) {
c[a[i].first] = a[i].second;
c[a[i].second] = a[i].first;
}
vector<int> was(2 * n);
vector<vector<int>> path;
vector<int> d;
for (int z = 0; z < 2 * n; z++) {
if (was[z]) {
continue;
}
int now = z;
path.emplace_back();
do {
was[now] = 1;
path.back().emplace_back(now);
now = c[now] + 1;
} while (now < 2 * n && now != z);
if (path.size() > 1) {
d.emplace_back((int) path.back().size());
}
}
int ans = (int) path[0].size();
sort(d.rbegin(), d.rend());
debug(path);
debug(d);
int t = 0;
for (int i = 0; i < m; i++) {
if (i < (int) d.size()) {
ans += d[i] + 2;
} else if (t) {
ans += 3;
t ^= 1;
} else {
ans++;
t ^= 1;
}
}
cout << ans << '\n';
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
312 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
416 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
312 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
588 KB |
Output is correct |
2 |
Correct |
6 ms |
1096 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
584 KB |
Output is correct |
2 |
Correct |
8 ms |
1248 KB |
Output is correct |
3 |
Correct |
14 ms |
1920 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
1052 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
1484 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
74 ms |
10192 KB |
Output is correct |
2 |
Correct |
181 ms |
22992 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
128 ms |
17128 KB |
Output is correct |
2 |
Correct |
282 ms |
31480 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
408 ms |
58380 KB |
Output is correct |
2 |
Correct |
469 ms |
65536 KB |
Output is correct |
3 |
Runtime error |
452 ms |
65536 KB |
Execution killed with signal 9 |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
587 ms |
65536 KB |
Output is correct |
2 |
Correct |
629 ms |
65536 KB |
Output is correct |
3 |
Correct |
534 ms |
53932 KB |
Output is correct |
4 |
Correct |
535 ms |
54584 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
631 ms |
65540 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |