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답안 #417782

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
417782 2021-06-04T09:40:35 Z maomao90 Event Hopping 2 (JOI21_event2) C++17
100 / 100
 247 ms 31048 KB 
#include <bits/stdc++.h> 
using namespace std;

template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define MP make_pair
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define MT make_tuple
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define pb emplace_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;

#define INF 1000000005
#define LINF 1000000000000000005
#define MOD 1000000007
#define MAXN 200005
#define MAXL 25

struct range {
	int l, r, i;
	bool operator< (const range& o) const {
		return l < o.l;
	}
};

int n, k;
ii lr[MAXN];
range ranges[MAXN];
queue<range> q;
int p[MAXL][MAXN];
set<range> st;
vi ans;

bool in(ii l, ii r) {
	if (l.FI <= r.FI && l.SE > r.FI) {
		return 1;
	}
	swap(l, r);
	if (l.FI <= r.FI && l.SE > r.FI) {
		return 1;
	}
	return 0;
}

int jump(int i, int l) {
	int res = 0;
	RREP (k, MAXL - 1, 0) {
		if (p[k][i] != -1 && lr[p[k][i]].SE <= l) {
			res += (1 << k);
			i = p[k][i];
		}
	}
	return res;
}

int main() {
	scanf("%d%d", &n, &k);
	REP (i, 2, n + 2) {
		scanf("%d%d", &lr[i].FI, &lr[i].SE);
	}
	lr[0] = MP(0, 1); lr[1] = MP(INF, INF + 1);
	n += 2;
	REP (i, 0, n) {
		ranges[i] = {lr[i].FI, lr[i].SE, i};
	}
	sort(ranges, ranges + n, [&] (range l, range r) {
			return l.r < r.r;
			});
	memset(p, -1, sizeof p);
	REP (i, 0, n) {
		while (!q.empty() && q.front().r <= ranges[i].l) {
			p[0][q.front().i] = ranges[i].i;
			//printf("%d -> %d\n", q.front().i, ranges[i].i);
			q.pop();
		}
		q.push(ranges[i]);
	}
	REP (k, 1, MAXL) {
		REP (i, 0, n) {
			if (p[k - 1][i] == -1) continue;
			p[k][i] = p[k - 1][p[k - 1][i]];
		}
	}
	st.insert(ranges[0]); st.insert(ranges[n - 1]);
	int cur = jump(0, ranges[n - 1].l);
	REP (i, 2, n) {
		if (ans.size() == k) break;
		auto [l, r] = lr[i];
		auto nxt = st.lower_bound({l, -1, -1});
		auto prv = prev(nxt);
		if (in(MP(nxt -> l, nxt -> r), lr[i]) || 
				in(MP(prv -> l, prv -> r), lr[i])) {
			continue;
		}
		int tmp = cur;
		tmp -= jump(prv -> i, nxt -> l);
		int lft = jump(i, nxt -> l), rht = jump(prv -> i, l);
		tmp += lft + rht + 1;
		//printf("%d: %d %d\n", i, tmp, k);
		if (tmp >= k) {
			cur = tmp;
			st.insert({l, r, i});
			ans.pb(i);
		}
	}
	if (ans.empty()) {
		printf("-1\n");
	} else {
		for (int i : ans) {
			printf("%d\n", i - 1);
		}
	}
	return 0;
}

/*
4 2
1 4
3 5
4 9
7 10

12 3
1 4
1 8
1 3
1 2
1 4
3 8
3 5
3 9
6 11
6 10
6 12
6 7

6 3
1 7
2 5
2 4
4 8
4 7
8 9

6 4
1 3
1 2
2 4
4 5
5 6
6 7
*/

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:99:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   99 |   if (ans.size() == k) break;
      |       ~~~~~~~~~~~^~~~
event2.cpp:69:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |  scanf("%d%d", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~
event2.cpp:71:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |   scanf("%d%d", &lr[i].FI, &lr[i].SE);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19788 KB Output is correct
2 Correct 10 ms 19788 KB Output is correct
3 Correct 11 ms 19792 KB Output is correct
4 Correct 152 ms 30468 KB Output is correct
5 Correct 125 ms 30128 KB Output is correct
6 Correct 117 ms 29748 KB Output is correct
7 Correct 109 ms 29032 KB Output is correct
8 Correct 129 ms 30380 KB Output is correct
9 Correct 124 ms 30140 KB Output is correct
10 Correct 120 ms 29720 KB Output is correct
11 Correct 109 ms 29092 KB Output is correct
12 Correct 104 ms 27820 KB Output is correct
13 Correct 99 ms 27704 KB Output is correct
14 Correct 96 ms 27416 KB Output is correct
15 Correct 89 ms 26972 KB Output is correct
16 Correct 66 ms 24656 KB Output is correct
17 Correct 63 ms 24652 KB Output is correct
18 Correct 61 ms 24388 KB Output is correct
19 Correct 51 ms 23796 KB Output is correct
20 Correct 53 ms 23876 KB Output is correct
21 Correct 52 ms 23740 KB Output is correct
22 Correct 48 ms 23740 KB Output is correct
23 Correct 49 ms 23736 KB Output is correct
24 Correct 48 ms 23696 KB Output is correct
25 Correct 49 ms 23848 KB Output is correct
26 Correct 49 ms 23844 KB Output is correct
27 Correct 52 ms 23860 KB Output is correct
28 Correct 81 ms 23744 KB Output is correct
29 Correct 66 ms 23748 KB Output is correct
30 Correct 64 ms 23644 KB Output is correct
31 Correct 61 ms 23636 KB Output is correct
32 Correct 62 ms 23748 KB Output is correct
33 Correct 65 ms 23876 KB Output is correct
34 Correct 74 ms 26176 KB Output is correct
35 Correct 63 ms 25384 KB Output is correct
36 Correct 52 ms 24572 KB Output is correct
37 Correct 95 ms 27344 KB Output is correct
38 Correct 91 ms 27136 KB Output is correct
39 Correct 91 ms 27080 KB Output is correct
40 Correct 88 ms 26928 KB Output is correct
41 Correct 85 ms 26812 KB Output is correct
42 Correct 74 ms 23640 KB Output is correct
43 Correct 106 ms 27264 KB Output is correct
44 Correct 94 ms 26984 KB Output is correct
45 Correct 90 ms 26892 KB Output is correct
46 Correct 93 ms 26808 KB Output is correct

Subtask #2
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19812 KB Output is correct
2 Correct 10 ms 19788 KB Output is correct
3 Correct 9 ms 19788 KB Output is correct
4 Correct 10 ms 19788 KB Output is correct
5 Correct 10 ms 19788 KB Output is correct
6 Correct 9 ms 19788 KB Output is correct
7 Correct 9 ms 19788 KB Output is correct
8 Correct 10 ms 19788 KB Output is correct
9 Correct 10 ms 19780 KB Output is correct
10 Correct 10 ms 19832 KB Output is correct
11 Correct 10 ms 19792 KB Output is correct
12 Correct 9 ms 19788 KB Output is correct
13 Correct 10 ms 19816 KB Output is correct
14 Correct 10 ms 19764 KB Output is correct
15 Correct 11 ms 19788 KB Output is correct
16 Correct 10 ms 19772 KB Output is correct
17 Correct 10 ms 19804 KB Output is correct
18 Correct 10 ms 19788 KB Output is correct
19 Correct 10 ms 19788 KB Output is correct
20 Correct 9 ms 19788 KB Output is correct
21 Correct 9 ms 19896 KB Output is correct
22 Correct 10 ms 19788 KB Output is correct
23 Correct 9 ms 19764 KB Output is correct
24 Correct 9 ms 19800 KB Output is correct
25 Correct 9 ms 19832 KB Output is correct
26 Correct 10 ms 19784 KB Output is correct
27 Correct 9 ms 19788 KB Output is correct

Subtask #3
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19812 KB Output is correct
2 Correct 10 ms 19788 KB Output is correct
3 Correct 9 ms 19788 KB Output is correct
4 Correct 10 ms 19788 KB Output is correct
5 Correct 10 ms 19788 KB Output is correct
6 Correct 9 ms 19788 KB Output is correct
7 Correct 9 ms 19788 KB Output is correct
8 Correct 10 ms 19788 KB Output is correct
9 Correct 10 ms 19780 KB Output is correct
10 Correct 10 ms 19832 KB Output is correct
11 Correct 10 ms 19792 KB Output is correct
12 Correct 9 ms 19788 KB Output is correct
13 Correct 10 ms 19816 KB Output is correct
14 Correct 10 ms 19764 KB Output is correct
15 Correct 11 ms 19788 KB Output is correct
16 Correct 10 ms 19772 KB Output is correct
17 Correct 10 ms 19804 KB Output is correct
18 Correct 10 ms 19788 KB Output is correct
19 Correct 10 ms 19788 KB Output is correct
20 Correct 9 ms 19788 KB Output is correct
21 Correct 9 ms 19896 KB Output is correct
22 Correct 10 ms 19788 KB Output is correct
23 Correct 9 ms 19764 KB Output is correct
24 Correct 9 ms 19800 KB Output is correct
25 Correct 9 ms 19832 KB Output is correct
26 Correct 10 ms 19784 KB Output is correct
27 Correct 9 ms 19788 KB Output is correct
28 Correct 11 ms 19976 KB Output is correct
29 Correct 11 ms 19984 KB Output is correct
30 Correct 12 ms 19932 KB Output is correct
31 Correct 11 ms 19916 KB Output is correct
32 Correct 12 ms 20000 KB Output is correct
33 Correct 12 ms 19916 KB Output is correct
34 Correct 12 ms 19912 KB Output is correct
35 Correct 13 ms 20128 KB Output is correct
36 Correct 13 ms 20164 KB Output is correct
37 Correct 12 ms 20044 KB Output is correct
38 Correct 12 ms 20000 KB Output is correct
39 Correct 12 ms 20172 KB Output is correct
40 Correct 13 ms 20156 KB Output is correct
41 Correct 11 ms 20044 KB Output is correct
42 Correct 12 ms 19916 KB Output is correct
43 Correct 12 ms 20016 KB Output is correct
44 Correct 12 ms 20036 KB Output is correct
45 Correct 11 ms 20012 KB Output is correct
46 Correct 12 ms 19928 KB Output is correct
47 Correct 11 ms 19908 KB Output is correct
48 Correct 11 ms 19912 KB Output is correct
49 Correct 11 ms 19908 KB Output is correct
50 Correct 12 ms 19916 KB Output is correct
51 Correct 11 ms 19916 KB Output is correct
52 Correct 12 ms 19984 KB Output is correct
53 Correct 11 ms 19924 KB Output is correct
54 Correct 11 ms 19956 KB Output is correct
55 Correct 12 ms 20156 KB Output is correct
56 Correct 12 ms 20172 KB Output is correct
57 Correct 12 ms 20172 KB Output is correct
58 Correct 13 ms 20096 KB Output is correct
59 Correct 14 ms 20148 KB Output is correct
60 Correct 14 ms 20172 KB Output is correct
61 Correct 12 ms 20172 KB Output is correct
62 Correct 12 ms 20172 KB Output is correct
63 Correct 12 ms 20172 KB Output is correct
64 Correct 11 ms 19916 KB Output is correct

Subtask #4
61.0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 19788 KB Output is correct
2 Correct 10 ms 19788 KB Output is correct
3 Correct 11 ms 19792 KB Output is correct
4 Correct 152 ms 30468 KB Output is correct
5 Correct 125 ms 30128 KB Output is correct
6 Correct 117 ms 29748 KB Output is correct
7 Correct 109 ms 29032 KB Output is correct
8 Correct 129 ms 30380 KB Output is correct
9 Correct 124 ms 30140 KB Output is correct
10 Correct 120 ms 29720 KB Output is correct
11 Correct 109 ms 29092 KB Output is correct
12 Correct 104 ms 27820 KB Output is correct
13 Correct 99 ms 27704 KB Output is correct
14 Correct 96 ms 27416 KB Output is correct
15 Correct 89 ms 26972 KB Output is correct
16 Correct 66 ms 24656 KB Output is correct
17 Correct 63 ms 24652 KB Output is correct
18 Correct 61 ms 24388 KB Output is correct
19 Correct 51 ms 23796 KB Output is correct
20 Correct 53 ms 23876 KB Output is correct
21 Correct 52 ms 23740 KB Output is correct
22 Correct 48 ms 23740 KB Output is correct
23 Correct 49 ms 23736 KB Output is correct
24 Correct 48 ms 23696 KB Output is correct
25 Correct 49 ms 23848 KB Output is correct
26 Correct 49 ms 23844 KB Output is correct
27 Correct 52 ms 23860 KB Output is correct
28 Correct 81 ms 23744 KB Output is correct
29 Correct 66 ms 23748 KB Output is correct
30 Correct 64 ms 23644 KB Output is correct
31 Correct 61 ms 23636 KB Output is correct
32 Correct 62 ms 23748 KB Output is correct
33 Correct 65 ms 23876 KB Output is correct
34 Correct 74 ms 26176 KB Output is correct
35 Correct 63 ms 25384 KB Output is correct
36 Correct 52 ms 24572 KB Output is correct
37 Correct 95 ms 27344 KB Output is correct
38 Correct 91 ms 27136 KB Output is correct
39 Correct 91 ms 27080 KB Output is correct
40 Correct 88 ms 26928 KB Output is correct
41 Correct 85 ms 26812 KB Output is correct
42 Correct 74 ms 23640 KB Output is correct
43 Correct 106 ms 27264 KB Output is correct
44 Correct 94 ms 26984 KB Output is correct
45 Correct 90 ms 26892 KB Output is correct
46 Correct 93 ms 26808 KB Output is correct
47 Correct 10 ms 19812 KB Output is correct
48 Correct 10 ms 19788 KB Output is correct
49 Correct 9 ms 19788 KB Output is correct
50 Correct 10 ms 19788 KB Output is correct
51 Correct 10 ms 19788 KB Output is correct
52 Correct 9 ms 19788 KB Output is correct
53 Correct 9 ms 19788 KB Output is correct
54 Correct 10 ms 19788 KB Output is correct
55 Correct 10 ms 19780 KB Output is correct
56 Correct 10 ms 19832 KB Output is correct
57 Correct 10 ms 19792 KB Output is correct
58 Correct 9 ms 19788 KB Output is correct
59 Correct 10 ms 19816 KB Output is correct
60 Correct 10 ms 19764 KB Output is correct
61 Correct 11 ms 19788 KB Output is correct
62 Correct 10 ms 19772 KB Output is correct
63 Correct 10 ms 19804 KB Output is correct
64 Correct 10 ms 19788 KB Output is correct
65 Correct 10 ms 19788 KB Output is correct
66 Correct 9 ms 19788 KB Output is correct
67 Correct 9 ms 19896 KB Output is correct
68 Correct 10 ms 19788 KB Output is correct
69 Correct 9 ms 19764 KB Output is correct
70 Correct 9 ms 19800 KB Output is correct
71 Correct 9 ms 19832 KB Output is correct
72 Correct 10 ms 19784 KB Output is correct
73 Correct 9 ms 19788 KB Output is correct
74 Correct 11 ms 19976 KB Output is correct
75 Correct 11 ms 19984 KB Output is correct
76 Correct 12 ms 19932 KB Output is correct
77 Correct 11 ms 19916 KB Output is correct
78 Correct 12 ms 20000 KB Output is correct
79 Correct 12 ms 19916 KB Output is correct
80 Correct 12 ms 19912 KB Output is correct
81 Correct 13 ms 20128 KB Output is correct
82 Correct 13 ms 20164 KB Output is correct
83 Correct 12 ms 20044 KB Output is correct
84 Correct 12 ms 20000 KB Output is correct
85 Correct 12 ms 20172 KB Output is correct
86 Correct 13 ms 20156 KB Output is correct
87 Correct 11 ms 20044 KB Output is correct
88 Correct 12 ms 19916 KB Output is correct
89 Correct 12 ms 20016 KB Output is correct
90 Correct 12 ms 20036 KB Output is correct
91 Correct 11 ms 20012 KB Output is correct
92 Correct 12 ms 19928 KB Output is correct
93 Correct 11 ms 19908 KB Output is correct
94 Correct 11 ms 19912 KB Output is correct
95 Correct 11 ms 19908 KB Output is correct
96 Correct 12 ms 19916 KB Output is correct
97 Correct 11 ms 19916 KB Output is correct
98 Correct 12 ms 19984 KB Output is correct
99 Correct 11 ms 19924 KB Output is correct
100 Correct 11 ms 19956 KB Output is correct
101 Correct 12 ms 20156 KB Output is correct
102 Correct 12 ms 20172 KB Output is correct
103 Correct 12 ms 20172 KB Output is correct
104 Correct 13 ms 20096 KB Output is correct
105 Correct 14 ms 20148 KB Output is correct
106 Correct 14 ms 20172 KB Output is correct
107 Correct 12 ms 20172 KB Output is correct
108 Correct 12 ms 20172 KB Output is correct
109 Correct 12 ms 20172 KB Output is correct
110 Correct 11 ms 19916 KB Output is correct
111 Correct 56 ms 23668 KB Output is correct
112 Correct 55 ms 23736 KB Output is correct
113 Correct 57 ms 23852 KB Output is correct
114 Correct 52 ms 23748 KB Output is correct
115 Correct 53 ms 23872 KB Output is correct
116 Correct 89 ms 23760 KB Output is correct
117 Correct 89 ms 23696 KB Output is correct
118 Correct 247 ms 30524 KB Output is correct
119 Correct 223 ms 29900 KB Output is correct
120 Correct 134 ms 26964 KB Output is correct
121 Correct 159 ms 23748 KB Output is correct
122 Correct 165 ms 27808 KB Output is correct
123 Correct 165 ms 27472 KB Output is correct
124 Correct 132 ms 27084 KB Output is correct
125 Correct 151 ms 23744 KB Output is correct
126 Correct 90 ms 24568 KB Output is correct
127 Correct 88 ms 24556 KB Output is correct
128 Correct 80 ms 24388 KB Output is correct
129 Correct 131 ms 23848 KB Output is correct
130 Correct 70 ms 23756 KB Output is correct
131 Correct 65 ms 23744 KB Output is correct
132 Correct 76 ms 23836 KB Output is correct
133 Correct 100 ms 23868 KB Output is correct
134 Correct 61 ms 23748 KB Output is correct
135 Correct 58 ms 23668 KB Output is correct
136 Correct 56 ms 23748 KB Output is correct
137 Correct 89 ms 23780 KB Output is correct
138 Correct 54 ms 23748 KB Output is correct
139 Correct 52 ms 23748 KB Output is correct
140 Correct 50 ms 23748 KB Output is correct
141 Correct 76 ms 23776 KB Output is correct
142 Correct 132 ms 30896 KB Output is correct
143 Correct 133 ms 31048 KB Output is correct
144 Correct 134 ms 30976 KB Output is correct
145 Correct 115 ms 30908 KB Output is correct
146 Correct 118 ms 30752 KB Output is correct
147 Correct 116 ms 30584 KB Output is correct
148 Correct 115 ms 30428 KB Output is correct
149 Correct 116 ms 30332 KB Output is correct
150 Correct 120 ms 30228 KB Output is correct
151 Correct 109 ms 29460 KB Output is correct
152 Correct 72 ms 23748 KB Output is correct
153 Correct 121 ms 30904 KB Output is correct
154 Correct 121 ms 30740 KB Output is correct
155 Correct 120 ms 30636 KB Output is correct
156 Correct 123 ms 30524 KB Output is correct
157 Correct 115 ms 30364 KB Output is correct
158 Correct 121 ms 30136 KB Output is correct
159 Correct 105 ms 29484 KB Output is correct
160 Correct 71 ms 23748 KB Output is correct
161 Correct 155 ms 27260 KB Output is correct
162 Correct 141 ms 27136 KB Output is correct
163 Correct 141 ms 27052 KB Output is correct
164 Correct 132 ms 26844 KB Output is correct
165 Correct 118 ms 26688 KB Output is correct
166 Correct 73 ms 23748 KB Output is correct
167 Correct 100 ms 27132 KB Output is correct
168 Correct 100 ms 27072 KB Output is correct
169 Correct 91 ms 26944 KB Output is correct
170 Correct 93 ms 26700 KB Output is correct
171 Correct 88 ms 26676 KB Output is correct
172 Correct 95 ms 27400 KB Output is correct
173 Correct 203 ms 27328 KB Output is correct
174 Correct 160 ms 27348 KB Output is correct
175 Correct 158 ms 27272 KB Output is correct
176 Correct 135 ms 26580 KB Output is correct