#include <bits/stdc++.h>
using i64 = long long;
int main() {
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int n, k;
std::cin >> n >> k;
std::vector<int> l(n), r(n);
for (int i = 0; i < n; i++) {
std::cin >> l[i] >> r[i];
}
std::vector<int> dp(n, 0), suff(n + 1, 0);
for (int i = n - 1; i >= 0; i--) {
int lft = i + 1, rgh = n - 1, pos = n;
while (lft <= rgh) {
int m = (lft + rgh) / 2;
if (l[m] >= r[i]) {
rgh = m - 1;
pos = m;
} else {
lft = m + 1;
}
}
dp[i] = suff[pos] + 1;
suff[i] = std::max(suff[i + 1], dp[i]);
}
std::vector<int> sol;
int last = 0;
for (int i = 0; i < n; i++) {
if (l[i] >= last && dp[i] >= k) {
last = r[i];
k--;
sol.push_back(i + 1);
}
if (k == 0) {
break;
}
}
if (k > 0) {
std::cout << "-1\n";
return 0;
}
for (auto it : sol) {
std::cout << it << "\n";
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
23 ms |
3028 KB |
Output is correct |
5 |
Correct |
21 ms |
2808 KB |
Output is correct |
6 |
Correct |
22 ms |
2776 KB |
Output is correct |
7 |
Correct |
25 ms |
2772 KB |
Output is correct |
8 |
Correct |
21 ms |
3024 KB |
Output is correct |
9 |
Correct |
23 ms |
2900 KB |
Output is correct |
10 |
Correct |
22 ms |
2776 KB |
Output is correct |
11 |
Correct |
21 ms |
2672 KB |
Output is correct |
12 |
Correct |
21 ms |
2528 KB |
Output is correct |
13 |
Correct |
20 ms |
2528 KB |
Output is correct |
14 |
Correct |
20 ms |
2528 KB |
Output is correct |
15 |
Correct |
20 ms |
2524 KB |
Output is correct |
16 |
Correct |
18 ms |
2140 KB |
Output is correct |
17 |
Correct |
18 ms |
2040 KB |
Output is correct |
18 |
Correct |
18 ms |
2140 KB |
Output is correct |
19 |
Correct |
20 ms |
2012 KB |
Output is correct |
20 |
Correct |
19 ms |
1880 KB |
Output is correct |
21 |
Correct |
19 ms |
2012 KB |
Output is correct |
22 |
Correct |
21 ms |
1880 KB |
Output is correct |
23 |
Correct |
21 ms |
2020 KB |
Output is correct |
24 |
Correct |
21 ms |
1884 KB |
Output is correct |
25 |
Correct |
22 ms |
1880 KB |
Output is correct |
26 |
Correct |
22 ms |
1884 KB |
Output is correct |
27 |
Correct |
23 ms |
1884 KB |
Output is correct |
28 |
Correct |
17 ms |
2024 KB |
Output is correct |
29 |
Correct |
17 ms |
3916 KB |
Output is correct |
30 |
Correct |
19 ms |
3920 KB |
Output is correct |
31 |
Correct |
20 ms |
3920 KB |
Output is correct |
32 |
Correct |
22 ms |
3928 KB |
Output is correct |
33 |
Correct |
23 ms |
3932 KB |
Output is correct |
34 |
Correct |
24 ms |
4312 KB |
Output is correct |
35 |
Correct |
19 ms |
4180 KB |
Output is correct |
36 |
Correct |
22 ms |
3928 KB |
Output is correct |
37 |
Correct |
20 ms |
4436 KB |
Output is correct |
38 |
Correct |
20 ms |
4576 KB |
Output is correct |
39 |
Correct |
20 ms |
4312 KB |
Output is correct |
40 |
Correct |
25 ms |
4308 KB |
Output is correct |
41 |
Correct |
20 ms |
4436 KB |
Output is correct |
42 |
Correct |
17 ms |
3916 KB |
Output is correct |
43 |
Correct |
20 ms |
4312 KB |
Output is correct |
44 |
Correct |
20 ms |
4312 KB |
Output is correct |
45 |
Correct |
19 ms |
4304 KB |
Output is correct |
46 |
Correct |
19 ms |
4308 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
23 ms |
3028 KB |
Output is correct |
5 |
Correct |
21 ms |
2808 KB |
Output is correct |
6 |
Correct |
22 ms |
2776 KB |
Output is correct |
7 |
Correct |
25 ms |
2772 KB |
Output is correct |
8 |
Correct |
21 ms |
3024 KB |
Output is correct |
9 |
Correct |
23 ms |
2900 KB |
Output is correct |
10 |
Correct |
22 ms |
2776 KB |
Output is correct |
11 |
Correct |
21 ms |
2672 KB |
Output is correct |
12 |
Correct |
21 ms |
2528 KB |
Output is correct |
13 |
Correct |
20 ms |
2528 KB |
Output is correct |
14 |
Correct |
20 ms |
2528 KB |
Output is correct |
15 |
Correct |
20 ms |
2524 KB |
Output is correct |
16 |
Correct |
18 ms |
2140 KB |
Output is correct |
17 |
Correct |
18 ms |
2040 KB |
Output is correct |
18 |
Correct |
18 ms |
2140 KB |
Output is correct |
19 |
Correct |
20 ms |
2012 KB |
Output is correct |
20 |
Correct |
19 ms |
1880 KB |
Output is correct |
21 |
Correct |
19 ms |
2012 KB |
Output is correct |
22 |
Correct |
21 ms |
1880 KB |
Output is correct |
23 |
Correct |
21 ms |
2020 KB |
Output is correct |
24 |
Correct |
21 ms |
1884 KB |
Output is correct |
25 |
Correct |
22 ms |
1880 KB |
Output is correct |
26 |
Correct |
22 ms |
1884 KB |
Output is correct |
27 |
Correct |
23 ms |
1884 KB |
Output is correct |
28 |
Correct |
17 ms |
2024 KB |
Output is correct |
29 |
Correct |
17 ms |
3916 KB |
Output is correct |
30 |
Correct |
19 ms |
3920 KB |
Output is correct |
31 |
Correct |
20 ms |
3920 KB |
Output is correct |
32 |
Correct |
22 ms |
3928 KB |
Output is correct |
33 |
Correct |
23 ms |
3932 KB |
Output is correct |
34 |
Correct |
24 ms |
4312 KB |
Output is correct |
35 |
Correct |
19 ms |
4180 KB |
Output is correct |
36 |
Correct |
22 ms |
3928 KB |
Output is correct |
37 |
Correct |
20 ms |
4436 KB |
Output is correct |
38 |
Correct |
20 ms |
4576 KB |
Output is correct |
39 |
Correct |
20 ms |
4312 KB |
Output is correct |
40 |
Correct |
25 ms |
4308 KB |
Output is correct |
41 |
Correct |
20 ms |
4436 KB |
Output is correct |
42 |
Correct |
17 ms |
3916 KB |
Output is correct |
43 |
Correct |
20 ms |
4312 KB |
Output is correct |
44 |
Correct |
20 ms |
4312 KB |
Output is correct |
45 |
Correct |
19 ms |
4304 KB |
Output is correct |
46 |
Correct |
19 ms |
4308 KB |
Output is correct |
47 |
Correct |
0 ms |
348 KB |
Output is correct |
48 |
Correct |
0 ms |
348 KB |
Output is correct |
49 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
50 |
Halted |
0 ms |
0 KB |
- |