oj.uz

Submission #521610

# Submission time Handle Problem Language Result Execution time Memory
521610 2022-02-02T14:37:19 Z eecs Event Hopping 2 (JOI21_event2) C++17
100 / 100
 166 ms 25528 KB 
#include <bits/stdc++.h>
using namespace std;

const int maxn = 200010;
int n, K, nxt[20][maxn], mn[maxn];
struct seg { int l, r; } p[maxn];
set<pair<int, int>> S;

int main() {
	scanf("%d %d", &n, &K);
	vector<int> V;
	for (int i = 1; i <= n; i++) {
		scanf("%d %d", &p[i].l, &p[i].r);
		V.push_back(p[i].l), V.push_back(--p[i].r);
	}
	sort(V.begin(), V.end());
	V.resize(unique(V.begin(), V.end()) - V.begin());
	memset(mn, 0x3f, sizeof(mn));
	memset(nxt, 0x3f, sizeof(nxt));
	for (int i = 1; i <= n; i++) {
		p[i].l = lower_bound(V.begin(), V.end(), p[i].l) - V.begin() + 1;
		p[i].r = lower_bound(V.begin(), V.end(), p[i].r) - V.begin() + 1;
		mn[p[i].l] = min(mn[p[i].l], p[i].r);
	}
	for (int i = n << 1; i; i--) {
		nxt[0][i] = mn[i] = min(mn[i], mn[i + 1]);
	}
	for (int i = 1; i < 20; i++) {
		for (int j = 1; j <= n << 1; j++) {
			if (nxt[i - 1][j] > 1e9) nxt[i][j] = nxt[i - 1][j];
			else nxt[i][j] = nxt[i - 1][nxt[i - 1][j] + 1];
		}
	}
	auto query = [&](int l, int r) {
		if (nxt[0][l] > r) return 0;
		int ans = 0;
		for (int i = 19; ~i; i--) if (nxt[i][l] <= r) {
			l = nxt[i][l] + 1, ans |= 1 << i;
		}
		return ans;
	};
	S.emplace(0, 0), S.emplace(n << 1 | 1, n << 1 | 1);
	int cur = query(1, n << 1);
	if (cur < K) puts("-1"), exit(0);
	for (int i = 1, cnt = 0; i <= n; i++) {
		auto nxt = S.lower_bound({p[i].l, 0}), pre = prev(nxt);
		if (pre->second >= p[i].l || p[i].r >= nxt->first) continue;
		int coef = query(pre->second + 1, p[i].l - 1) + query(p[i].r + 1,
			nxt->first - 1) - query(pre->second + 1, nxt->first - 1) + 1;
		if (cur + coef >= K) {
			cur += coef, S.emplace(p[i].l, p[i].r);
			printf("%d\n", i);
			if (++cnt == K) break;
		}
	}
	return 0;
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |  scanf("%d %d", &n, &K);
      |  ~~~~~^~~~~~~~~~~~~~~~~
event2.cpp:13:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |   scanf("%d %d", &p[i].l, &p[i].r);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16716 KB Output is correct
2 Correct 8 ms 16684 KB Output is correct
3 Correct 8 ms 16652 KB Output is correct
4 Correct 124 ms 25056 KB Output is correct
5 Correct 116 ms 24876 KB Output is correct
6 Correct 100 ms 24592 KB Output is correct
7 Correct 97 ms 24164 KB Output is correct
8 Correct 106 ms 25136 KB Output is correct
9 Correct 110 ms 24884 KB Output is correct
10 Correct 130 ms 24596 KB Output is correct
11 Correct 119 ms 24072 KB Output is correct
12 Correct 98 ms 23160 KB Output is correct
13 Correct 92 ms 23092 KB Output is correct
14 Correct 80 ms 22868 KB Output is correct
15 Correct 73 ms 22640 KB Output is correct
16 Correct 82 ms 20872 KB Output is correct
17 Correct 62 ms 20768 KB Output is correct
18 Correct 79 ms 20932 KB Output is correct
19 Correct 58 ms 20276 KB Output is correct
20 Correct 60 ms 20296 KB Output is correct
21 Correct 65 ms 20392 KB Output is correct
22 Correct 59 ms 20280 KB Output is correct
23 Correct 63 ms 20276 KB Output is correct
24 Correct 83 ms 20256 KB Output is correct
25 Correct 77 ms 20244 KB Output is correct
26 Correct 71 ms 20280 KB Output is correct
27 Correct 64 ms 20332 KB Output is correct
28 Correct 64 ms 20360 KB Output is correct
29 Correct 59 ms 20412 KB Output is correct
30 Correct 55 ms 20312 KB Output is correct
31 Correct 55 ms 20300 KB Output is correct
32 Correct 75 ms 20364 KB Output is correct
33 Correct 64 ms 20556 KB Output is correct
34 Correct 75 ms 22024 KB Output is correct
35 Correct 86 ms 21340 KB Output is correct
36 Correct 56 ms 20756 KB Output is correct
37 Correct 84 ms 22756 KB Output is correct
38 Correct 77 ms 22736 KB Output is correct
39 Correct 73 ms 22728 KB Output is correct
40 Correct 80 ms 22616 KB Output is correct
41 Correct 71 ms 22360 KB Output is correct
42 Correct 60 ms 20280 KB Output is correct
43 Correct 84 ms 22700 KB Output is correct
44 Correct 88 ms 22552 KB Output is correct
45 Correct 84 ms 22444 KB Output is correct
46 Correct 82 ms 22344 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16684 KB Output is correct
2 Correct 7 ms 16716 KB Output is correct
3 Correct 7 ms 16648 KB Output is correct
4 Correct 8 ms 16716 KB Output is correct
5 Correct 8 ms 16684 KB Output is correct
6 Correct 7 ms 16716 KB Output is correct
7 Correct 7 ms 16688 KB Output is correct
8 Correct 8 ms 16680 KB Output is correct
9 Correct 7 ms 16716 KB Output is correct
10 Correct 7 ms 16688 KB Output is correct
11 Correct 8 ms 16716 KB Output is correct
12 Correct 8 ms 16736 KB Output is correct
13 Correct 7 ms 16716 KB Output is correct
14 Correct 8 ms 16716 KB Output is correct
15 Correct 7 ms 16716 KB Output is correct
16 Correct 7 ms 16716 KB Output is correct
17 Correct 8 ms 16692 KB Output is correct
18 Correct 8 ms 16716 KB Output is correct
19 Correct 7 ms 16676 KB Output is correct
20 Correct 7 ms 16684 KB Output is correct
21 Correct 8 ms 16716 KB Output is correct
22 Correct 8 ms 16704 KB Output is correct
23 Correct 7 ms 16716 KB Output is correct
24 Correct 7 ms 16696 KB Output is correct
25 Correct 8 ms 16716 KB Output is correct
26 Correct 7 ms 16716 KB Output is correct
27 Correct 7 ms 16688 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16684 KB Output is correct
2 Correct 7 ms 16716 KB Output is correct
3 Correct 7 ms 16648 KB Output is correct
4 Correct 8 ms 16716 KB Output is correct
5 Correct 8 ms 16684 KB Output is correct
6 Correct 7 ms 16716 KB Output is correct
7 Correct 7 ms 16688 KB Output is correct
8 Correct 8 ms 16680 KB Output is correct
9 Correct 7 ms 16716 KB Output is correct
10 Correct 7 ms 16688 KB Output is correct
11 Correct 8 ms 16716 KB Output is correct
12 Correct 8 ms 16736 KB Output is correct
13 Correct 7 ms 16716 KB Output is correct
14 Correct 8 ms 16716 KB Output is correct
15 Correct 7 ms 16716 KB Output is correct
16 Correct 7 ms 16716 KB Output is correct
17 Correct 8 ms 16692 KB Output is correct
18 Correct 8 ms 16716 KB Output is correct
19 Correct 7 ms 16676 KB Output is correct
20 Correct 7 ms 16684 KB Output is correct
21 Correct 8 ms 16716 KB Output is correct
22 Correct 8 ms 16704 KB Output is correct
23 Correct 7 ms 16716 KB Output is correct
24 Correct 7 ms 16696 KB Output is correct
25 Correct 8 ms 16716 KB Output is correct
26 Correct 7 ms 16716 KB Output is correct
27 Correct 7 ms 16688 KB Output is correct
28 Correct 9 ms 16884 KB Output is correct
29 Correct 9 ms 16760 KB Output is correct
30 Correct 9 ms 16828 KB Output is correct
31 Correct 9 ms 16768 KB Output is correct
32 Correct 10 ms 16828 KB Output is correct
33 Correct 9 ms 16844 KB Output is correct
34 Correct 9 ms 16756 KB Output is correct
35 Correct 11 ms 17004 KB Output is correct
36 Correct 10 ms 16972 KB Output is correct
37 Correct 10 ms 16844 KB Output is correct
38 Correct 9 ms 16880 KB Output is correct
39 Correct 11 ms 16884 KB Output is correct
40 Correct 10 ms 16844 KB Output is correct
41 Correct 10 ms 16888 KB Output is correct
42 Correct 9 ms 16880 KB Output is correct
43 Correct 10 ms 16892 KB Output is correct
44 Correct 11 ms 16884 KB Output is correct
45 Correct 10 ms 16832 KB Output is correct
46 Correct 9 ms 16844 KB Output is correct
47 Correct 10 ms 16800 KB Output is correct
48 Correct 10 ms 16760 KB Output is correct
49 Correct 9 ms 16760 KB Output is correct
50 Correct 9 ms 16844 KB Output is correct
51 Correct 9 ms 16844 KB Output is correct
52 Correct 9 ms 16820 KB Output is correct
53 Correct 12 ms 16844 KB Output is correct
54 Correct 10 ms 16844 KB Output is correct
55 Correct 11 ms 16884 KB Output is correct
56 Correct 10 ms 17004 KB Output is correct
57 Correct 10 ms 16972 KB Output is correct
58 Correct 12 ms 16972 KB Output is correct
59 Correct 10 ms 16972 KB Output is correct
60 Correct 9 ms 16952 KB Output is correct
61 Correct 9 ms 16896 KB Output is correct
62 Correct 10 ms 16892 KB Output is correct
63 Correct 9 ms 16952 KB Output is correct
64 Correct 8 ms 16844 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16716 KB Output is correct
2 Correct 8 ms 16684 KB Output is correct
3 Correct 8 ms 16652 KB Output is correct
4 Correct 124 ms 25056 KB Output is correct
5 Correct 116 ms 24876 KB Output is correct
6 Correct 100 ms 24592 KB Output is correct
7 Correct 97 ms 24164 KB Output is correct
8 Correct 106 ms 25136 KB Output is correct
9 Correct 110 ms 24884 KB Output is correct
10 Correct 130 ms 24596 KB Output is correct
11 Correct 119 ms 24072 KB Output is correct
12 Correct 98 ms 23160 KB Output is correct
13 Correct 92 ms 23092 KB Output is correct
14 Correct 80 ms 22868 KB Output is correct
15 Correct 73 ms 22640 KB Output is correct
16 Correct 82 ms 20872 KB Output is correct
17 Correct 62 ms 20768 KB Output is correct
18 Correct 79 ms 20932 KB Output is correct
19 Correct 58 ms 20276 KB Output is correct
20 Correct 60 ms 20296 KB Output is correct
21 Correct 65 ms 20392 KB Output is correct
22 Correct 59 ms 20280 KB Output is correct
23 Correct 63 ms 20276 KB Output is correct
24 Correct 83 ms 20256 KB Output is correct
25 Correct 77 ms 20244 KB Output is correct
26 Correct 71 ms 20280 KB Output is correct
27 Correct 64 ms 20332 KB Output is correct
28 Correct 64 ms 20360 KB Output is correct
29 Correct 59 ms 20412 KB Output is correct
30 Correct 55 ms 20312 KB Output is correct
31 Correct 55 ms 20300 KB Output is correct
32 Correct 75 ms 20364 KB Output is correct
33 Correct 64 ms 20556 KB Output is correct
34 Correct 75 ms 22024 KB Output is correct
35 Correct 86 ms 21340 KB Output is correct
36 Correct 56 ms 20756 KB Output is correct
37 Correct 84 ms 22756 KB Output is correct
38 Correct 77 ms 22736 KB Output is correct
39 Correct 73 ms 22728 KB Output is correct
40 Correct 80 ms 22616 KB Output is correct
41 Correct 71 ms 22360 KB Output is correct
42 Correct 60 ms 20280 KB Output is correct
43 Correct 84 ms 22700 KB Output is correct
44 Correct 88 ms 22552 KB Output is correct
45 Correct 84 ms 22444 KB Output is correct
46 Correct 82 ms 22344 KB Output is correct
47 Correct 7 ms 16684 KB Output is correct
48 Correct 7 ms 16716 KB Output is correct
49 Correct 7 ms 16648 KB Output is correct
50 Correct 8 ms 16716 KB Output is correct
51 Correct 8 ms 16684 KB Output is correct
52 Correct 7 ms 16716 KB Output is correct
53 Correct 7 ms 16688 KB Output is correct
54 Correct 8 ms 16680 KB Output is correct
55 Correct 7 ms 16716 KB Output is correct
56 Correct 7 ms 16688 KB Output is correct
57 Correct 8 ms 16716 KB Output is correct
58 Correct 8 ms 16736 KB Output is correct
59 Correct 7 ms 16716 KB Output is correct
60 Correct 8 ms 16716 KB Output is correct
61 Correct 7 ms 16716 KB Output is correct
62 Correct 7 ms 16716 KB Output is correct
63 Correct 8 ms 16692 KB Output is correct
64 Correct 8 ms 16716 KB Output is correct
65 Correct 7 ms 16676 KB Output is correct
66 Correct 7 ms 16684 KB Output is correct
67 Correct 8 ms 16716 KB Output is correct
68 Correct 8 ms 16704 KB Output is correct
69 Correct 7 ms 16716 KB Output is correct
70 Correct 7 ms 16696 KB Output is correct
71 Correct 8 ms 16716 KB Output is correct
72 Correct 7 ms 16716 KB Output is correct
73 Correct 7 ms 16688 KB Output is correct
74 Correct 9 ms 16884 KB Output is correct
75 Correct 9 ms 16760 KB Output is correct
76 Correct 9 ms 16828 KB Output is correct
77 Correct 9 ms 16768 KB Output is correct
78 Correct 10 ms 16828 KB Output is correct
79 Correct 9 ms 16844 KB Output is correct
80 Correct 9 ms 16756 KB Output is correct
81 Correct 11 ms 17004 KB Output is correct
82 Correct 10 ms 16972 KB Output is correct
83 Correct 10 ms 16844 KB Output is correct
84 Correct 9 ms 16880 KB Output is correct
85 Correct 11 ms 16884 KB Output is correct
86 Correct 10 ms 16844 KB Output is correct
87 Correct 10 ms 16888 KB Output is correct
88 Correct 9 ms 16880 KB Output is correct
89 Correct 10 ms 16892 KB Output is correct
90 Correct 11 ms 16884 KB Output is correct
91 Correct 10 ms 16832 KB Output is correct
92 Correct 9 ms 16844 KB Output is correct
93 Correct 10 ms 16800 KB Output is correct
94 Correct 10 ms 16760 KB Output is correct
95 Correct 9 ms 16760 KB Output is correct
96 Correct 9 ms 16844 KB Output is correct
97 Correct 9 ms 16844 KB Output is correct
98 Correct 9 ms 16820 KB Output is correct
99 Correct 12 ms 16844 KB Output is correct
100 Correct 10 ms 16844 KB Output is correct
101 Correct 11 ms 16884 KB Output is correct
102 Correct 10 ms 17004 KB Output is correct
103 Correct 10 ms 16972 KB Output is correct
104 Correct 12 ms 16972 KB Output is correct
105 Correct 10 ms 16972 KB Output is correct
106 Correct 9 ms 16952 KB Output is correct
107 Correct 9 ms 16896 KB Output is correct
108 Correct 10 ms 16892 KB Output is correct
109 Correct 9 ms 16952 KB Output is correct
110 Correct 8 ms 16844 KB Output is correct
111 Correct 80 ms 20364 KB Output is correct
112 Correct 79 ms 20284 KB Output is correct
113 Correct 80 ms 20384 KB Output is correct
114 Correct 76 ms 20260 KB Output is correct
115 Correct 78 ms 20240 KB Output is correct
116 Correct 71 ms 20252 KB Output is correct
117 Correct 76 ms 20448 KB Output is correct
118 Correct 166 ms 25108 KB Output is correct
119 Correct 155 ms 24588 KB Output is correct
120 Correct 117 ms 22580 KB Output is correct
121 Correct 70 ms 20248 KB Output is correct
122 Correct 131 ms 23260 KB Output is correct
123 Correct 132 ms 23004 KB Output is correct
124 Correct 130 ms 22592 KB Output is correct
125 Correct 73 ms 20316 KB Output is correct
126 Correct 113 ms 20832 KB Output is correct
127 Correct 93 ms 20812 KB Output is correct
128 Correct 92 ms 20680 KB Output is correct
129 Correct 71 ms 20316 KB Output is correct
130 Correct 90 ms 20376 KB Output is correct
131 Correct 81 ms 20280 KB Output is correct
132 Correct 79 ms 20280 KB Output is correct
133 Correct 70 ms 20336 KB Output is correct
134 Correct 84 ms 20380 KB Output is correct
135 Correct 81 ms 20412 KB Output is correct
136 Correct 78 ms 20240 KB Output is correct
137 Correct 70 ms 20296 KB Output is correct
138 Correct 77 ms 20364 KB Output is correct
139 Correct 76 ms 20312 KB Output is correct
140 Correct 90 ms 20276 KB Output is correct
141 Correct 72 ms 20444 KB Output is correct
142 Correct 97 ms 25504 KB Output is correct
143 Correct 95 ms 25528 KB Output is correct
144 Correct 96 ms 25484 KB Output is correct
145 Correct 91 ms 25456 KB Output is correct
146 Correct 84 ms 25272 KB Output is correct
147 Correct 84 ms 25196 KB Output is correct
148 Correct 87 ms 25168 KB Output is correct
149 Correct 85 ms 25012 KB Output is correct
150 Correct 84 ms 24888 KB Output is correct
151 Correct 81 ms 24436 KB Output is correct
152 Correct 47 ms 20268 KB Output is correct
153 Correct 91 ms 25436 KB Output is correct
154 Correct 89 ms 25268 KB Output is correct
155 Correct 88 ms 25252 KB Output is correct
156 Correct 92 ms 25140 KB Output is correct
157 Correct 83 ms 25012 KB Output is correct
158 Correct 89 ms 24884 KB Output is correct
159 Correct 78 ms 24360 KB Output is correct
160 Correct 48 ms 20372 KB Output is correct
161 Correct 123 ms 22828 KB Output is correct
162 Correct 132 ms 22708 KB Output is correct
163 Correct 121 ms 22740 KB Output is correct
164 Correct 115 ms 22540 KB Output is correct
165 Correct 108 ms 22328 KB Output is correct
166 Correct 51 ms 20312 KB Output is correct
167 Correct 78 ms 22712 KB Output is correct
168 Correct 76 ms 22588 KB Output is correct
169 Correct 79 ms 22560 KB Output is correct
170 Correct 74 ms 22356 KB Output is correct
171 Correct 71 ms 22200 KB Output is correct
172 Correct 76 ms 22864 KB Output is correct
173 Correct 133 ms 22836 KB Output is correct
174 Correct 132 ms 22920 KB Output is correct
175 Correct 130 ms 22792 KB Output is correct
176 Correct 118 ms 22452 KB Output is correct