oj.uz

Submission #524910

# Submission time Handle Problem Language Result Execution time Memory
524910 2022-02-10T09:24:00 Z amunduzbaev Event Hopping 2 (JOI21_event2) C++17
100 / 100
 172 ms 25564 KB 
#include "bits/stdc++.h"
using namespace std;

#define ar array

const int N = 2e5 + 5;
int par[N][20]; //, pref[N][20];
set<ar<int, 2>> ss;

struct BIT{
	int tree[N + 5];
	void add(int i, int v){ ++i;
		for(;i<N;i+=(i&-i)) tree[i] += v;
	}
	
	int get(int i){ i++;
		int r = 0;
		for(;i>0;i-=(i&-i)) r += tree[i];
		return r;
	}
	
	int get(int l, int r){
		return get(r) - get(--l);
	}
	
	void sett(int i, int v){
		add(i, v - get(i, i));
	}
}tree;

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n, k; cin>>n>>k;
	vector<ar<int, 2>> a(n);
	vector<int> p;
	for(int i=0;i<n;i++){
		cin>>a[i][0]>>a[i][1];
		p.push_back(i<<1);
		p.push_back(i<<1|1);
	}
	
	sort(p.begin(), p.end(), [&](int i, int j){
		return a[i>>1][i&1] < a[j>>1][j&1];
	});
	
	for(int i=0, last=1;i<2*n;){
		int j = i;
		while(j < 2*n && a[p[i]>>1][p[i]&1] == a[p[j]>>1][p[j]&1]){
			j++;
		} while(i < j){
			a[p[i]>>1][p[i]&1] = last;
			i++;
		} last++;
	}
	
	//~ for(int i=0;i<n;i++) cout<<a[i][0]<<" "<<a[i][1]<<"\n";
	
	memset(par, 127, sizeof par);
	for(int i=0;i<n;i++){
		par[a[i][0]][0] = min(par[a[i][0]][0], a[i][1]);
	} par[N - 1][0] = N;
	for(int i=N-2;~i;i--) par[i][0] = min(par[i][0], par[i+1][0]);
	for(int j=1;j<20;j++){
		for(int i=0;i<N;i++){
			if(par[i][j-1] < N) par[i][j] = par[par[i][j-1]][j-1];
			else par[i][j] = N;
		} 
	}
	auto get = [&](int l, int r){
		int res = 0;
		for(int j=19;~j;j--){
			if(par[l][j] <= r) l = par[l][j], res += (1 << j);
		} return res;
	};
	
	ss.insert({N - 1, N - 1});
	ss.insert({0, 0});
	vector<int> res;
	int cc = 0;
	for(int i=0;i<n && cc < k;i++){
		auto& r = a[i];
		auto it = ss.lower_bound({r[1], -1});
		assert(it != ss.begin());
		if((*--it)[1] > r[0]) continue;
		int lx = (*it)[1], rx = (*++it)[0];
		assert(it != ss.end());
		int lc = get(lx, r[0]), rc = get(r[1], rx);
		
		int tot = rc + lc + 1 + cc;
		if(rx < N) tot += tree.get(rx + 1, N);
		if(0 < lx) tot += tree.get(0, lx - 1);
		if(tot >= k){
			ss.insert(r);
			tree.sett(lx, lc);
			tree.sett(r[1], rc);
			res.push_back(i);
			cc++;
		}
	}
	
	if(cc == k){
		for(auto x : res) cout<<x + 1<<"\n";
	} else {
		cout<<-1<<"\n";
	}
}

/*

11 3
34 69
62 76
9 25
4 37
32 35
34 53
6 57
7 19
4 14
12 39
48 48

*/

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 16076 KB Output is correct
2 Correct 34 ms 15952 KB Output is correct
3 Correct 34 ms 15964 KB Output is correct
4 Correct 128 ms 23564 KB Output is correct
5 Correct 125 ms 23256 KB Output is correct
6 Correct 123 ms 23076 KB Output is correct
7 Correct 122 ms 22380 KB Output is correct
8 Correct 125 ms 23488 KB Output is correct
9 Correct 125 ms 23200 KB Output is correct
10 Correct 121 ms 22916 KB Output is correct
11 Correct 115 ms 22464 KB Output is correct
12 Correct 111 ms 21528 KB Output is correct
13 Correct 108 ms 21292 KB Output is correct
14 Correct 108 ms 21224 KB Output is correct
15 Correct 104 ms 20792 KB Output is correct
16 Correct 79 ms 19020 KB Output is correct
17 Correct 79 ms 18952 KB Output is correct
18 Correct 80 ms 18828 KB Output is correct
19 Correct 73 ms 18416 KB Output is correct
20 Correct 73 ms 18512 KB Output is correct
21 Correct 72 ms 18408 KB Output is correct
22 Correct 71 ms 18420 KB Output is correct
23 Correct 70 ms 18368 KB Output is correct
24 Correct 70 ms 18368 KB Output is correct
25 Correct 70 ms 17764 KB Output is correct
26 Correct 73 ms 17796 KB Output is correct
27 Correct 72 ms 17800 KB Output is correct
28 Correct 79 ms 17612 KB Output is correct
29 Correct 81 ms 17656 KB Output is correct
30 Correct 78 ms 17636 KB Output is correct
31 Correct 79 ms 17604 KB Output is correct
32 Correct 83 ms 17664 KB Output is correct
33 Correct 80 ms 17640 KB Output is correct
34 Correct 99 ms 19976 KB Output is correct
35 Correct 83 ms 19084 KB Output is correct
36 Correct 74 ms 18316 KB Output is correct
37 Correct 101 ms 21140 KB Output is correct
38 Correct 98 ms 20980 KB Output is correct
39 Correct 102 ms 20836 KB Output is correct
40 Correct 96 ms 20616 KB Output is correct
41 Correct 94 ms 20516 KB Output is correct
42 Correct 100 ms 17600 KB Output is correct
43 Correct 119 ms 20928 KB Output is correct
44 Correct 112 ms 20860 KB Output is correct
45 Correct 110 ms 20776 KB Output is correct
46 Correct 114 ms 20596 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 15972 KB Output is correct
2 Correct 36 ms 15952 KB Output is correct
3 Correct 35 ms 15960 KB Output is correct
4 Correct 34 ms 15960 KB Output is correct
5 Correct 34 ms 15948 KB Output is correct
6 Correct 33 ms 15952 KB Output is correct
7 Correct 34 ms 15952 KB Output is correct
8 Correct 35 ms 15960 KB Output is correct
9 Correct 35 ms 15948 KB Output is correct
10 Correct 35 ms 15972 KB Output is correct
11 Correct 34 ms 15948 KB Output is correct
12 Correct 37 ms 15960 KB Output is correct
13 Correct 38 ms 15964 KB Output is correct
14 Correct 34 ms 15948 KB Output is correct
15 Correct 34 ms 15948 KB Output is correct
16 Correct 35 ms 15964 KB Output is correct
17 Correct 34 ms 15972 KB Output is correct
18 Correct 35 ms 15960 KB Output is correct
19 Correct 39 ms 15948 KB Output is correct
20 Correct 34 ms 15948 KB Output is correct
21 Correct 34 ms 15948 KB Output is correct
22 Correct 35 ms 15960 KB Output is correct
23 Correct 34 ms 15956 KB Output is correct
24 Correct 36 ms 15948 KB Output is correct
25 Correct 36 ms 15948 KB Output is correct
26 Correct 37 ms 15964 KB Output is correct
27 Correct 36 ms 15956 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 15972 KB Output is correct
2 Correct 36 ms 15952 KB Output is correct
3 Correct 35 ms 15960 KB Output is correct
4 Correct 34 ms 15960 KB Output is correct
5 Correct 34 ms 15948 KB Output is correct
6 Correct 33 ms 15952 KB Output is correct
7 Correct 34 ms 15952 KB Output is correct
8 Correct 35 ms 15960 KB Output is correct
9 Correct 35 ms 15948 KB Output is correct
10 Correct 35 ms 15972 KB Output is correct
11 Correct 34 ms 15948 KB Output is correct
12 Correct 37 ms 15960 KB Output is correct
13 Correct 38 ms 15964 KB Output is correct
14 Correct 34 ms 15948 KB Output is correct
15 Correct 34 ms 15948 KB Output is correct
16 Correct 35 ms 15964 KB Output is correct
17 Correct 34 ms 15972 KB Output is correct
18 Correct 35 ms 15960 KB Output is correct
19 Correct 39 ms 15948 KB Output is correct
20 Correct 34 ms 15948 KB Output is correct
21 Correct 34 ms 15948 KB Output is correct
22 Correct 35 ms 15960 KB Output is correct
23 Correct 34 ms 15956 KB Output is correct
24 Correct 36 ms 15948 KB Output is correct
25 Correct 36 ms 15948 KB Output is correct
26 Correct 37 ms 15964 KB Output is correct
27 Correct 36 ms 15956 KB Output is correct
28 Correct 37 ms 16068 KB Output is correct
29 Correct 41 ms 16100 KB Output is correct
30 Correct 35 ms 16080 KB Output is correct
31 Correct 35 ms 16104 KB Output is correct
32 Correct 36 ms 16112 KB Output is correct
33 Correct 36 ms 16112 KB Output is correct
34 Correct 36 ms 16032 KB Output is correct
35 Correct 37 ms 16196 KB Output is correct
36 Correct 38 ms 16224 KB Output is correct
37 Correct 37 ms 16224 KB Output is correct
38 Correct 37 ms 16076 KB Output is correct
39 Correct 37 ms 16196 KB Output is correct
40 Correct 38 ms 16240 KB Output is correct
41 Correct 38 ms 16112 KB Output is correct
42 Correct 38 ms 16076 KB Output is correct
43 Correct 36 ms 16080 KB Output is correct
44 Correct 39 ms 16200 KB Output is correct
45 Correct 37 ms 16112 KB Output is correct
46 Correct 36 ms 16076 KB Output is correct
47 Correct 35 ms 16088 KB Output is correct
48 Correct 36 ms 16088 KB Output is correct
49 Correct 37 ms 16136 KB Output is correct
50 Correct 36 ms 16076 KB Output is correct
51 Correct 36 ms 16084 KB Output is correct
52 Correct 37 ms 16040 KB Output is correct
53 Correct 41 ms 16124 KB Output is correct
54 Correct 37 ms 16100 KB Output is correct
55 Correct 39 ms 16196 KB Output is correct
56 Correct 36 ms 16196 KB Output is correct
57 Correct 40 ms 16200 KB Output is correct
58 Correct 38 ms 16228 KB Output is correct
59 Correct 38 ms 16232 KB Output is correct
60 Correct 36 ms 16196 KB Output is correct
61 Correct 37 ms 16196 KB Output is correct
62 Correct 36 ms 16240 KB Output is correct
63 Correct 37 ms 16208 KB Output is correct
64 Correct 38 ms 16076 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 16076 KB Output is correct
2 Correct 34 ms 15952 KB Output is correct
3 Correct 34 ms 15964 KB Output is correct
4 Correct 128 ms 23564 KB Output is correct
5 Correct 125 ms 23256 KB Output is correct
6 Correct 123 ms 23076 KB Output is correct
7 Correct 122 ms 22380 KB Output is correct
8 Correct 125 ms 23488 KB Output is correct
9 Correct 125 ms 23200 KB Output is correct
10 Correct 121 ms 22916 KB Output is correct
11 Correct 115 ms 22464 KB Output is correct
12 Correct 111 ms 21528 KB Output is correct
13 Correct 108 ms 21292 KB Output is correct
14 Correct 108 ms 21224 KB Output is correct
15 Correct 104 ms 20792 KB Output is correct
16 Correct 79 ms 19020 KB Output is correct
17 Correct 79 ms 18952 KB Output is correct
18 Correct 80 ms 18828 KB Output is correct
19 Correct 73 ms 18416 KB Output is correct
20 Correct 73 ms 18512 KB Output is correct
21 Correct 72 ms 18408 KB Output is correct
22 Correct 71 ms 18420 KB Output is correct
23 Correct 70 ms 18368 KB Output is correct
24 Correct 70 ms 18368 KB Output is correct
25 Correct 70 ms 17764 KB Output is correct
26 Correct 73 ms 17796 KB Output is correct
27 Correct 72 ms 17800 KB Output is correct
28 Correct 79 ms 17612 KB Output is correct
29 Correct 81 ms 17656 KB Output is correct
30 Correct 78 ms 17636 KB Output is correct
31 Correct 79 ms 17604 KB Output is correct
32 Correct 83 ms 17664 KB Output is correct
33 Correct 80 ms 17640 KB Output is correct
34 Correct 99 ms 19976 KB Output is correct
35 Correct 83 ms 19084 KB Output is correct
36 Correct 74 ms 18316 KB Output is correct
37 Correct 101 ms 21140 KB Output is correct
38 Correct 98 ms 20980 KB Output is correct
39 Correct 102 ms 20836 KB Output is correct
40 Correct 96 ms 20616 KB Output is correct
41 Correct 94 ms 20516 KB Output is correct
42 Correct 100 ms 17600 KB Output is correct
43 Correct 119 ms 20928 KB Output is correct
44 Correct 112 ms 20860 KB Output is correct
45 Correct 110 ms 20776 KB Output is correct
46 Correct 114 ms 20596 KB Output is correct
47 Correct 34 ms 15972 KB Output is correct
48 Correct 36 ms 15952 KB Output is correct
49 Correct 35 ms 15960 KB Output is correct
50 Correct 34 ms 15960 KB Output is correct
51 Correct 34 ms 15948 KB Output is correct
52 Correct 33 ms 15952 KB Output is correct
53 Correct 34 ms 15952 KB Output is correct
54 Correct 35 ms 15960 KB Output is correct
55 Correct 35 ms 15948 KB Output is correct
56 Correct 35 ms 15972 KB Output is correct
57 Correct 34 ms 15948 KB Output is correct
58 Correct 37 ms 15960 KB Output is correct
59 Correct 38 ms 15964 KB Output is correct
60 Correct 34 ms 15948 KB Output is correct
61 Correct 34 ms 15948 KB Output is correct
62 Correct 35 ms 15964 KB Output is correct
63 Correct 34 ms 15972 KB Output is correct
64 Correct 35 ms 15960 KB Output is correct
65 Correct 39 ms 15948 KB Output is correct
66 Correct 34 ms 15948 KB Output is correct
67 Correct 34 ms 15948 KB Output is correct
68 Correct 35 ms 15960 KB Output is correct
69 Correct 34 ms 15956 KB Output is correct
70 Correct 36 ms 15948 KB Output is correct
71 Correct 36 ms 15948 KB Output is correct
72 Correct 37 ms 15964 KB Output is correct
73 Correct 36 ms 15956 KB Output is correct
74 Correct 37 ms 16068 KB Output is correct
75 Correct 41 ms 16100 KB Output is correct
76 Correct 35 ms 16080 KB Output is correct
77 Correct 35 ms 16104 KB Output is correct
78 Correct 36 ms 16112 KB Output is correct
79 Correct 36 ms 16112 KB Output is correct
80 Correct 36 ms 16032 KB Output is correct
81 Correct 37 ms 16196 KB Output is correct
82 Correct 38 ms 16224 KB Output is correct
83 Correct 37 ms 16224 KB Output is correct
84 Correct 37 ms 16076 KB Output is correct
85 Correct 37 ms 16196 KB Output is correct
86 Correct 38 ms 16240 KB Output is correct
87 Correct 38 ms 16112 KB Output is correct
88 Correct 38 ms 16076 KB Output is correct
89 Correct 36 ms 16080 KB Output is correct
90 Correct 39 ms 16200 KB Output is correct
91 Correct 37 ms 16112 KB Output is correct
92 Correct 36 ms 16076 KB Output is correct
93 Correct 35 ms 16088 KB Output is correct
94 Correct 36 ms 16088 KB Output is correct
95 Correct 37 ms 16136 KB Output is correct
96 Correct 36 ms 16076 KB Output is correct
97 Correct 36 ms 16084 KB Output is correct
98 Correct 37 ms 16040 KB Output is correct
99 Correct 41 ms 16124 KB Output is correct
100 Correct 37 ms 16100 KB Output is correct
101 Correct 39 ms 16196 KB Output is correct
102 Correct 36 ms 16196 KB Output is correct
103 Correct 40 ms 16200 KB Output is correct
104 Correct 38 ms 16228 KB Output is correct
105 Correct 38 ms 16232 KB Output is correct
106 Correct 36 ms 16196 KB Output is correct
107 Correct 37 ms 16196 KB Output is correct
108 Correct 36 ms 16240 KB Output is correct
109 Correct 37 ms 16208 KB Output is correct
110 Correct 38 ms 16076 KB Output is correct
111 Correct 82 ms 20344 KB Output is correct
112 Correct 82 ms 20300 KB Output is correct
113 Correct 83 ms 20220 KB Output is correct
114 Correct 82 ms 19900 KB Output is correct
115 Correct 82 ms 20064 KB Output is correct
116 Correct 97 ms 19572 KB Output is correct
117 Correct 98 ms 19524 KB Output is correct
118 Correct 172 ms 25540 KB Output is correct
119 Correct 155 ms 24896 KB Output is correct
120 Correct 128 ms 22808 KB Output is correct
121 Correct 126 ms 19520 KB Output is correct
122 Correct 139 ms 23432 KB Output is correct
123 Correct 131 ms 23104 KB Output is correct
124 Correct 123 ms 22828 KB Output is correct
125 Correct 130 ms 19576 KB Output is correct
126 Correct 103 ms 20908 KB Output is correct
127 Correct 98 ms 20856 KB Output is correct
128 Correct 98 ms 20816 KB Output is correct
129 Correct 119 ms 19580 KB Output is correct
130 Correct 93 ms 20288 KB Output is correct
131 Correct 92 ms 20276 KB Output is correct
132 Correct 86 ms 20292 KB Output is correct
133 Correct 106 ms 19648 KB Output is correct
134 Correct 87 ms 20376 KB Output is correct
135 Correct 84 ms 20316 KB Output is correct
136 Correct 82 ms 20320 KB Output is correct
137 Correct 104 ms 19520 KB Output is correct
138 Correct 80 ms 19752 KB Output is correct
139 Correct 78 ms 19776 KB Output is correct
140 Correct 78 ms 19792 KB Output is correct
141 Correct 93 ms 19516 KB Output is correct
142 Correct 129 ms 25564 KB Output is correct
143 Correct 123 ms 25484 KB Output is correct
144 Correct 122 ms 25500 KB Output is correct
145 Correct 109 ms 25420 KB Output is correct
146 Correct 111 ms 25372 KB Output is correct
147 Correct 109 ms 25220 KB Output is correct
148 Correct 107 ms 25024 KB Output is correct
149 Correct 110 ms 25024 KB Output is correct
150 Correct 105 ms 24800 KB Output is correct
151 Correct 100 ms 24200 KB Output is correct
152 Correct 74 ms 19520 KB Output is correct
153 Correct 113 ms 25544 KB Output is correct
154 Correct 113 ms 25340 KB Output is correct
155 Correct 107 ms 25264 KB Output is correct
156 Correct 114 ms 25272 KB Output is correct
157 Correct 105 ms 24928 KB Output is correct
158 Correct 104 ms 24868 KB Output is correct
159 Correct 99 ms 24276 KB Output is correct
160 Correct 74 ms 19536 KB Output is correct
161 Correct 134 ms 22900 KB Output is correct
162 Correct 121 ms 22720 KB Output is correct
163 Correct 120 ms 22592 KB Output is correct
164 Correct 117 ms 22536 KB Output is correct
165 Correct 117 ms 22460 KB Output is correct
166 Correct 86 ms 19632 KB Output is correct
167 Correct 106 ms 22860 KB Output is correct
168 Correct 110 ms 22832 KB Output is correct
169 Correct 107 ms 22592 KB Output is correct
170 Correct 102 ms 22496 KB Output is correct
171 Correct 106 ms 22336 KB Output is correct
172 Correct 98 ms 23016 KB Output is correct
173 Correct 125 ms 22624 KB Output is correct
174 Correct 127 ms 22676 KB Output is correct
175 Correct 131 ms 22600 KB Output is correct
176 Correct 113 ms 22052 KB Output is correct