oj.uz

Submission #783695

# Submission time Handle Problem Language Result Execution time Memory
783695 2023-07-15T08:37:33 Z Abrar_Al_Samit Event Hopping 2 (JOI21_event2) C++17
100 / 100
 491 ms 45880 KB 
#include<bits/stdc++.h>
using namespace std;



const int nax = 2e5 + 3;
const int lg = 20;

int to[nax];
int jt[nax][lg];

int jump(int i, int j) {
	if(jt[i][j]!=-1) return jt[i][j];

	if(j==0) return jt[i][j] = to[i];

	return jt[i][j] = jump(jump(i, j-1), j-1);
}
int get_ans(int l, int r) {
	int ret = 0;
	for(int i=lg-1; i>=0; --i) {
		if(jump(r, i)>=l) {
			ret |= 1<<i;
			r = jump(r, i);
		}
	}
	return ret;
}
void PlayGround() {
	int n, k;
	cin>>n>>k;

	map<pair<int,int>, int>rg;
	map<int,int>h;

	for(int i=1; i<=n; ++i) {
		int l, r;
		cin>>l>>r;

		int cr = rg[{l, r}];
		if(!cr) {
			rg[{l, r}] = i;
			h[l] = h[r] = 1;
		}
	}
	int cm = 1;

	for(auto &it : h) {
		it.second = cm++;
	}

	for(auto &it : rg) {
		auto [l, r] = it.first;

		to[h[r]] = max(to[h[r]], h[l]);
	}

	for(int i=1; i<=2 * n + 1; ++i) {
		to[i] = max(to[i], to[i-1]);
	}


	memset(jt, -1, sizeof jt);

	map<int, pair<int,int>>id_to_rg;
	for(auto it : rg) {
		id_to_rg[it.second] = it.first;
	}


	int cur = get_ans(1, 2*n + 1);

	if(cur < k) {
		cout<<"-1\n";
		return;
	}

	set<pair<int,int>>alive = {{2 * n + 1, 1}};

	vector<int>ans;
	for(auto it : id_to_rg) {
		if(ans.size()==k) break;

		auto [l, r] = it.second;
		l = h[l], r = h[r];

		auto rel = *alive.lower_bound(make_pair(r, -1));

		if(rel.second<=l) { //can take
			int new_ans = cur - get_ans(rel.second, rel.first) 
				+ get_ans(rel.second, l) + get_ans(r, rel.first);

			if(new_ans + ans.size() + 1 >= k) {
				ans.push_back(it.first);
				cur = new_ans;

				alive.erase(rel);
				alive.insert({l, rel.second});
				alive.insert({rel.first, r});
			}
		}
	}
	for(int x : ans) {
		cout<<x<<'\n';
	}


	// cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	PlayGround();
	return 0;
}

Compilation message

event2.cpp: In function 'void PlayGround()':
event2.cpp:82:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   82 |   if(ans.size()==k) break;
      |      ~~~~~~~~~~^~~
event2.cpp:93:32: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   93 |    if(new_ans + ans.size() + 1 >= k) {
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 15956 KB Output is correct
2 Correct 6 ms 15944 KB Output is correct
3 Correct 7 ms 16076 KB Output is correct
4 Correct 201 ms 45768 KB Output is correct
5 Correct 221 ms 45520 KB Output is correct
6 Correct 191 ms 45252 KB Output is correct
7 Correct 179 ms 44740 KB Output is correct
8 Correct 205 ms 45880 KB Output is correct
9 Correct 204 ms 45644 KB Output is correct
10 Correct 197 ms 45376 KB Output is correct
11 Correct 179 ms 44772 KB Output is correct
12 Correct 191 ms 43828 KB Output is correct
13 Correct 175 ms 43604 KB Output is correct
14 Correct 173 ms 43440 KB Output is correct
15 Correct 169 ms 43104 KB Output is correct
16 Correct 144 ms 41328 KB Output is correct
17 Correct 148 ms 41196 KB Output is correct
18 Correct 141 ms 41088 KB Output is correct
19 Correct 142 ms 40708 KB Output is correct
20 Correct 141 ms 40584 KB Output is correct
21 Correct 155 ms 40652 KB Output is correct
22 Correct 147 ms 40548 KB Output is correct
23 Correct 149 ms 40504 KB Output is correct
24 Correct 148 ms 40536 KB Output is correct
25 Correct 178 ms 40608 KB Output is correct
26 Correct 214 ms 40604 KB Output is correct
27 Correct 171 ms 40496 KB Output is correct
28 Correct 115 ms 40524 KB Output is correct
29 Correct 108 ms 40484 KB Output is correct
30 Correct 115 ms 40592 KB Output is correct
31 Correct 120 ms 40564 KB Output is correct
32 Correct 121 ms 40512 KB Output is correct
33 Correct 142 ms 40600 KB Output is correct
34 Correct 153 ms 42568 KB Output is correct
35 Correct 138 ms 41844 KB Output is correct
36 Correct 117 ms 41164 KB Output is correct
37 Correct 213 ms 43436 KB Output is correct
38 Correct 197 ms 43336 KB Output is correct
39 Correct 198 ms 43204 KB Output is correct
40 Correct 208 ms 43080 KB Output is correct
41 Correct 190 ms 42968 KB Output is correct
42 Correct 123 ms 40604 KB Output is correct
43 Correct 214 ms 43324 KB Output is correct
44 Correct 184 ms 43108 KB Output is correct
45 Correct 187 ms 43108 KB Output is correct
46 Correct 186 ms 42956 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 15956 KB Output is correct
2 Correct 6 ms 15956 KB Output is correct
3 Correct 6 ms 15956 KB Output is correct
4 Correct 6 ms 15956 KB Output is correct
5 Correct 6 ms 15956 KB Output is correct
6 Correct 7 ms 15948 KB Output is correct
7 Correct 6 ms 15956 KB Output is correct
8 Correct 8 ms 15956 KB Output is correct
9 Correct 6 ms 15956 KB Output is correct
10 Correct 6 ms 15944 KB Output is correct
11 Correct 7 ms 15876 KB Output is correct
12 Correct 6 ms 15956 KB Output is correct
13 Correct 6 ms 15956 KB Output is correct
14 Correct 6 ms 15956 KB Output is correct
15 Correct 6 ms 15956 KB Output is correct
16 Correct 6 ms 15952 KB Output is correct
17 Correct 6 ms 15956 KB Output is correct
18 Correct 6 ms 15956 KB Output is correct
19 Correct 6 ms 15956 KB Output is correct
20 Correct 6 ms 15956 KB Output is correct
21 Correct 6 ms 15956 KB Output is correct
22 Correct 7 ms 15956 KB Output is correct
23 Correct 7 ms 15956 KB Output is correct
24 Correct 7 ms 15956 KB Output is correct
25 Correct 7 ms 15964 KB Output is correct
26 Correct 6 ms 15872 KB Output is correct
27 Correct 6 ms 15872 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 15956 KB Output is correct
2 Correct 6 ms 15956 KB Output is correct
3 Correct 6 ms 15956 KB Output is correct
4 Correct 6 ms 15956 KB Output is correct
5 Correct 6 ms 15956 KB Output is correct
6 Correct 7 ms 15948 KB Output is correct
7 Correct 6 ms 15956 KB Output is correct
8 Correct 8 ms 15956 KB Output is correct
9 Correct 6 ms 15956 KB Output is correct
10 Correct 6 ms 15944 KB Output is correct
11 Correct 7 ms 15876 KB Output is correct
12 Correct 6 ms 15956 KB Output is correct
13 Correct 6 ms 15956 KB Output is correct
14 Correct 6 ms 15956 KB Output is correct
15 Correct 6 ms 15956 KB Output is correct
16 Correct 6 ms 15952 KB Output is correct
17 Correct 6 ms 15956 KB Output is correct
18 Correct 6 ms 15956 KB Output is correct
19 Correct 6 ms 15956 KB Output is correct
20 Correct 6 ms 15956 KB Output is correct
21 Correct 6 ms 15956 KB Output is correct
22 Correct 7 ms 15956 KB Output is correct
23 Correct 7 ms 15956 KB Output is correct
24 Correct 7 ms 15956 KB Output is correct
25 Correct 7 ms 15964 KB Output is correct
26 Correct 6 ms 15872 KB Output is correct
27 Correct 6 ms 15872 KB Output is correct
28 Correct 11 ms 16728 KB Output is correct
29 Correct 11 ms 16700 KB Output is correct
30 Correct 10 ms 16724 KB Output is correct
31 Correct 10 ms 16672 KB Output is correct
32 Correct 10 ms 16728 KB Output is correct
33 Correct 10 ms 16724 KB Output is correct
34 Correct 12 ms 16720 KB Output is correct
35 Correct 12 ms 16852 KB Output is correct
36 Correct 12 ms 16852 KB Output is correct
37 Correct 15 ms 16736 KB Output is correct
38 Correct 11 ms 16724 KB Output is correct
39 Correct 13 ms 16872 KB Output is correct
40 Correct 12 ms 16840 KB Output is correct
41 Correct 12 ms 16724 KB Output is correct
42 Correct 11 ms 16604 KB Output is correct
43 Correct 11 ms 16724 KB Output is correct
44 Correct 11 ms 16724 KB Output is correct
45 Correct 11 ms 16724 KB Output is correct
46 Correct 9 ms 16724 KB Output is correct
47 Correct 12 ms 16724 KB Output is correct
48 Correct 11 ms 16724 KB Output is correct
49 Correct 11 ms 16724 KB Output is correct
50 Correct 11 ms 16724 KB Output is correct
51 Correct 12 ms 16708 KB Output is correct
52 Correct 11 ms 16612 KB Output is correct
53 Correct 11 ms 16596 KB Output is correct
54 Correct 10 ms 16596 KB Output is correct
55 Correct 10 ms 16728 KB Output is correct
56 Correct 10 ms 16720 KB Output is correct
57 Correct 10 ms 16724 KB Output is correct
58 Correct 11 ms 16660 KB Output is correct
59 Correct 10 ms 16712 KB Output is correct
60 Correct 10 ms 16696 KB Output is correct
61 Correct 10 ms 16724 KB Output is correct
62 Correct 10 ms 16724 KB Output is correct
63 Correct 10 ms 16724 KB Output is correct
64 Correct 8 ms 16572 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 15956 KB Output is correct
2 Correct 6 ms 15944 KB Output is correct
3 Correct 7 ms 16076 KB Output is correct
4 Correct 201 ms 45768 KB Output is correct
5 Correct 221 ms 45520 KB Output is correct
6 Correct 191 ms 45252 KB Output is correct
7 Correct 179 ms 44740 KB Output is correct
8 Correct 205 ms 45880 KB Output is correct
9 Correct 204 ms 45644 KB Output is correct
10 Correct 197 ms 45376 KB Output is correct
11 Correct 179 ms 44772 KB Output is correct
12 Correct 191 ms 43828 KB Output is correct
13 Correct 175 ms 43604 KB Output is correct
14 Correct 173 ms 43440 KB Output is correct
15 Correct 169 ms 43104 KB Output is correct
16 Correct 144 ms 41328 KB Output is correct
17 Correct 148 ms 41196 KB Output is correct
18 Correct 141 ms 41088 KB Output is correct
19 Correct 142 ms 40708 KB Output is correct
20 Correct 141 ms 40584 KB Output is correct
21 Correct 155 ms 40652 KB Output is correct
22 Correct 147 ms 40548 KB Output is correct
23 Correct 149 ms 40504 KB Output is correct
24 Correct 148 ms 40536 KB Output is correct
25 Correct 178 ms 40608 KB Output is correct
26 Correct 214 ms 40604 KB Output is correct
27 Correct 171 ms 40496 KB Output is correct
28 Correct 115 ms 40524 KB Output is correct
29 Correct 108 ms 40484 KB Output is correct
30 Correct 115 ms 40592 KB Output is correct
31 Correct 120 ms 40564 KB Output is correct
32 Correct 121 ms 40512 KB Output is correct
33 Correct 142 ms 40600 KB Output is correct
34 Correct 153 ms 42568 KB Output is correct
35 Correct 138 ms 41844 KB Output is correct
36 Correct 117 ms 41164 KB Output is correct
37 Correct 213 ms 43436 KB Output is correct
38 Correct 197 ms 43336 KB Output is correct
39 Correct 198 ms 43204 KB Output is correct
40 Correct 208 ms 43080 KB Output is correct
41 Correct 190 ms 42968 KB Output is correct
42 Correct 123 ms 40604 KB Output is correct
43 Correct 214 ms 43324 KB Output is correct
44 Correct 184 ms 43108 KB Output is correct
45 Correct 187 ms 43108 KB Output is correct
46 Correct 186 ms 42956 KB Output is correct
47 Correct 6 ms 15956 KB Output is correct
48 Correct 6 ms 15956 KB Output is correct
49 Correct 6 ms 15956 KB Output is correct
50 Correct 6 ms 15956 KB Output is correct
51 Correct 6 ms 15956 KB Output is correct
52 Correct 7 ms 15948 KB Output is correct
53 Correct 6 ms 15956 KB Output is correct
54 Correct 8 ms 15956 KB Output is correct
55 Correct 6 ms 15956 KB Output is correct
56 Correct 6 ms 15944 KB Output is correct
57 Correct 7 ms 15876 KB Output is correct
58 Correct 6 ms 15956 KB Output is correct
59 Correct 6 ms 15956 KB Output is correct
60 Correct 6 ms 15956 KB Output is correct
61 Correct 6 ms 15956 KB Output is correct
62 Correct 6 ms 15952 KB Output is correct
63 Correct 6 ms 15956 KB Output is correct
64 Correct 6 ms 15956 KB Output is correct
65 Correct 6 ms 15956 KB Output is correct
66 Correct 6 ms 15956 KB Output is correct
67 Correct 6 ms 15956 KB Output is correct
68 Correct 7 ms 15956 KB Output is correct
69 Correct 7 ms 15956 KB Output is correct
70 Correct 7 ms 15956 KB Output is correct
71 Correct 7 ms 15964 KB Output is correct
72 Correct 6 ms 15872 KB Output is correct
73 Correct 6 ms 15872 KB Output is correct
74 Correct 11 ms 16728 KB Output is correct
75 Correct 11 ms 16700 KB Output is correct
76 Correct 10 ms 16724 KB Output is correct
77 Correct 10 ms 16672 KB Output is correct
78 Correct 10 ms 16728 KB Output is correct
79 Correct 10 ms 16724 KB Output is correct
80 Correct 12 ms 16720 KB Output is correct
81 Correct 12 ms 16852 KB Output is correct
82 Correct 12 ms 16852 KB Output is correct
83 Correct 15 ms 16736 KB Output is correct
84 Correct 11 ms 16724 KB Output is correct
85 Correct 13 ms 16872 KB Output is correct
86 Correct 12 ms 16840 KB Output is correct
87 Correct 12 ms 16724 KB Output is correct
88 Correct 11 ms 16604 KB Output is correct
89 Correct 11 ms 16724 KB Output is correct
90 Correct 11 ms 16724 KB Output is correct
91 Correct 11 ms 16724 KB Output is correct
92 Correct 9 ms 16724 KB Output is correct
93 Correct 12 ms 16724 KB Output is correct
94 Correct 11 ms 16724 KB Output is correct
95 Correct 11 ms 16724 KB Output is correct
96 Correct 11 ms 16724 KB Output is correct
97 Correct 12 ms 16708 KB Output is correct
98 Correct 11 ms 16612 KB Output is correct
99 Correct 11 ms 16596 KB Output is correct
100 Correct 10 ms 16596 KB Output is correct
101 Correct 10 ms 16728 KB Output is correct
102 Correct 10 ms 16720 KB Output is correct
103 Correct 10 ms 16724 KB Output is correct
104 Correct 11 ms 16660 KB Output is correct
105 Correct 10 ms 16712 KB Output is correct
106 Correct 10 ms 16696 KB Output is correct
107 Correct 10 ms 16724 KB Output is correct
108 Correct 10 ms 16724 KB Output is correct
109 Correct 10 ms 16724 KB Output is correct
110 Correct 8 ms 16572 KB Output is correct
111 Correct 368 ms 40620 KB Output is correct
112 Correct 378 ms 40612 KB Output is correct
113 Correct 323 ms 40524 KB Output is correct
114 Correct 345 ms 40600 KB Output is correct
115 Correct 321 ms 40524 KB Output is correct
116 Correct 235 ms 40580 KB Output is correct
117 Correct 298 ms 40696 KB Output is correct
118 Correct 491 ms 45848 KB Output is correct
119 Correct 481 ms 45436 KB Output is correct
120 Correct 377 ms 43112 KB Output is correct
121 Correct 221 ms 40488 KB Output is correct
122 Correct 417 ms 43848 KB Output is correct
123 Correct 388 ms 43536 KB Output is correct
124 Correct 374 ms 43204 KB Output is correct
125 Correct 239 ms 40596 KB Output is correct
126 Correct 342 ms 41300 KB Output is correct
127 Correct 361 ms 41144 KB Output is correct
128 Correct 319 ms 41180 KB Output is correct
129 Correct 211 ms 40708 KB Output is correct
130 Correct 329 ms 40636 KB Output is correct
131 Correct 324 ms 40644 KB Output is correct
132 Correct 313 ms 40652 KB Output is correct
133 Correct 235 ms 40596 KB Output is correct
134 Correct 336 ms 40544 KB Output is correct
135 Correct 355 ms 40524 KB Output is correct
136 Correct 354 ms 40492 KB Output is correct
137 Correct 232 ms 40524 KB Output is correct
138 Correct 359 ms 40568 KB Output is correct
139 Correct 311 ms 40592 KB Output is correct
140 Correct 266 ms 40588 KB Output is correct
141 Correct 255 ms 40524 KB Output is correct
142 Correct 201 ms 41532 KB Output is correct
143 Correct 206 ms 41524 KB Output is correct
144 Correct 204 ms 41540 KB Output is correct
145 Correct 176 ms 41540 KB Output is correct
146 Correct 179 ms 41412 KB Output is correct
147 Correct 181 ms 41248 KB Output is correct
148 Correct 169 ms 41152 KB Output is correct
149 Correct 209 ms 41028 KB Output is correct
150 Correct 171 ms 41040 KB Output is correct
151 Correct 161 ms 40416 KB Output is correct
152 Correct 84 ms 35860 KB Output is correct
153 Correct 189 ms 41664 KB Output is correct
154 Correct 175 ms 41380 KB Output is correct
155 Correct 174 ms 41360 KB Output is correct
156 Correct 197 ms 41292 KB Output is correct
157 Correct 165 ms 41136 KB Output is correct
158 Correct 178 ms 40980 KB Output is correct
159 Correct 153 ms 40420 KB Output is correct
160 Correct 86 ms 35864 KB Output is correct
161 Correct 374 ms 41080 KB Output is correct
162 Correct 397 ms 40904 KB Output is correct
163 Correct 359 ms 40816 KB Output is correct
164 Correct 335 ms 40648 KB Output is correct
165 Correct 322 ms 40612 KB Output is correct
166 Correct 109 ms 40516 KB Output is correct
167 Correct 189 ms 43312 KB Output is correct
168 Correct 176 ms 43108 KB Output is correct
169 Correct 183 ms 43112 KB Output is correct
170 Correct 179 ms 42948 KB Output is correct
171 Correct 172 ms 42744 KB Output is correct
172 Correct 241 ms 43464 KB Output is correct
173 Correct 335 ms 38852 KB Output is correct
174 Correct 337 ms 38656 KB Output is correct
175 Correct 357 ms 38860 KB Output is correct
176 Correct 306 ms 38080 KB Output is correct