oj.uz

Submission #419292

# Submission time Handle Problem Language Result Execution time Memory
419292 2021-06-06T18:33:42 Z ryansee Event Hopping 2 (JOI21_event2) C++14
100 / 100
 277 ms 22876 KB 
#include "bits/stdc++.h"
using namespace std;

#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define f first
#define s second
#define cbr cerr<<"hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ll(x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x,y) (lower_bound(all(x),y)-x.begin())
#define ubd(x,y) (upper_bound(all(x),y)-x.begin())
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
inline long long rand(long long x, long long y) { return rng() % (y+1-x) + x; } //inclusive
string inline to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){ return a==0?llabs(b):gcd(b%a,a); }

using ll=long long;
using ld=long double;
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
using pi=pair<ll,ll>; using spi=pair<ll,pi>; using dpi=pair<pi,ll>; 

long long LLINF = 1e18;
int INF = 1e9+1e6;
#define MAXN (100006)
int n,k,p[MAXN][17],co;
pi A[MAXN];
vector<spi> v, u;
set<dpi> events;
ll solve(ll x,ll y) {
	// bsearch for last event that ends before y
	ll st=-1,en=siz(v);
	while(en-st>1) {
		ll mid=(st+en)>>1;
		if(v[mid].s.s <= y) st = mid;
		else en = mid;
	}
	if(st == -1 || v[st].s.f < x) return 0;
	ll ans = 1, i = v[st].f;
	// if(b==0) {
	DEC(j,16,0) if(p[i][j] != -1 && A[p[i][j]].f >= x) {
		i = p[i][j], ans += 1<<j;
	}
	// } else {
		// ll lol = v[st].s.f;
		// DEC(j,st-1,0) if(v[j].s.s <= lol) {
			// if(v[j].s.f < x) break;
			// ++ ans, lol = v[j].s.f;
		// }
	// }
	return ans;
}
int main() {
	FAST
	cin>>n>>k;
	FOR(i,1,n)cin>>A[i].f>>A[i].s, v.eb(i, A[i]);
	sort(all(v), [](spi x,spi y){return pi(x.s.f,-x.s.s)<pi(y.s.f,-y.s.s);});
	DEC(i,n-1,0) if(u.empty() || u.back().s.s > v[i].s.s) {
		u.eb(v[i]);
	}
	v.clear(); while(u.size()) v.eb(u.back()), u.pop_back();
	deque<int> dq;
	for(auto i:v) {
		if(dq.empty() || A[dq[0]].s > i.s.f) {
			p[i.f][0] = -1;
		} else {
			while(dq.size() > 1 && A[dq[1]].s <= i.s.f) dq.pop_front();
			p[i.f][0] = dq[0];
		}
		dq.eb(i.f);
	}
	FOR(j,1,16) FOR(i,1,n) if(p[i][j-1] != -1) p[i][j]=p[p[i][j-1]][j-1]; else p[i][j] = -1;
	events.ins(dpi(pi(0, 1), -1)), events.ins(dpi(pi(1e9, int(1e9) + 1), -1));
	co = solve(1, 1e9);
	if(co < k) {
		cout<<"-1\n";
		return 0;
	}
	FOR(i,1,n) {
		auto it = prev(events.upper_bound(dpi(pi(A[i].f, LLINF),LLINF)));
		if(it->f.s > A[i].f) continue;
		++ it;
		if(it->f.f < A[i].s) continue;
		int tmp = solve(prev(it)->f.s, it->f.f);
		int wow = solve(prev(it)->f.s, A[i].f) + solve(A[i].s, it->f.f) + 1;
		if(co - tmp + wow < k) continue;
		co += wow - tmp;
		events.ins(dpi(A[i], i));
		if(events.size() == k+2) break;
	}
	if(events.size() != k+2) {
		assert(0);
	} else {
		vector<int> ind;
		for(auto i:events) if(i.s != -1) ind.eb(i.s);
		sort(all(ind));
		for(auto i:ind) cout<<i<<'\n';
	}
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:92:20: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<std::pair<long long int, long long int>, long long int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   92 |   if(events.size() == k+2) break;
      |      ~~~~~~~~~~~~~~^~~~~~
event2.cpp:94:19: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<std::pair<long long int, long long int>, long long int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   94 |  if(events.size() != k+2) {
      |     ~~~~~~~~~~~~~~^~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 140 ms 20412 KB Output is correct
5 Correct 139 ms 20028 KB Output is correct
6 Correct 125 ms 19776 KB Output is correct
7 Correct 112 ms 19096 KB Output is correct
8 Correct 136 ms 20344 KB Output is correct
9 Correct 131 ms 20128 KB Output is correct
10 Correct 127 ms 19856 KB Output is correct
11 Correct 115 ms 19016 KB Output is correct
12 Correct 107 ms 17380 KB Output is correct
13 Correct 99 ms 17216 KB Output is correct
14 Correct 101 ms 17048 KB Output is correct
15 Correct 90 ms 16640 KB Output is correct
16 Correct 62 ms 13712 KB Output is correct
17 Correct 62 ms 13708 KB Output is correct
18 Correct 57 ms 13708 KB Output is correct
19 Correct 55 ms 12060 KB Output is correct
20 Correct 45 ms 11984 KB Output is correct
21 Correct 43 ms 12012 KB Output is correct
22 Correct 41 ms 11148 KB Output is correct
23 Correct 40 ms 11144 KB Output is correct
24 Correct 49 ms 11196 KB Output is correct
25 Correct 41 ms 10932 KB Output is correct
26 Correct 40 ms 10900 KB Output is correct
27 Correct 39 ms 10908 KB Output is correct
28 Correct 42 ms 13288 KB Output is correct
29 Correct 41 ms 13204 KB Output is correct
30 Correct 41 ms 13600 KB Output is correct
31 Correct 39 ms 12004 KB Output is correct
32 Correct 40 ms 11184 KB Output is correct
33 Correct 38 ms 11004 KB Output is correct
34 Correct 78 ms 15712 KB Output is correct
35 Correct 67 ms 14780 KB Output is correct
36 Correct 52 ms 13956 KB Output is correct
37 Correct 108 ms 15916 KB Output is correct
38 Correct 95 ms 15716 KB Output is correct
39 Correct 100 ms 15536 KB Output is correct
40 Correct 110 ms 15380 KB Output is correct
41 Correct 85 ms 15264 KB Output is correct
42 Correct 41 ms 13616 KB Output is correct
43 Correct 90 ms 15788 KB Output is correct
44 Correct 88 ms 15592 KB Output is correct
45 Correct 87 ms 15412 KB Output is correct
46 Correct 86 ms 15352 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 328 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 320 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 328 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 320 KB Output is correct
28 Correct 2 ms 716 KB Output is correct
29 Correct 2 ms 752 KB Output is correct
30 Correct 2 ms 716 KB Output is correct
31 Correct 3 ms 716 KB Output is correct
32 Correct 2 ms 716 KB Output is correct
33 Correct 2 ms 720 KB Output is correct
34 Correct 2 ms 716 KB Output is correct
35 Correct 5 ms 972 KB Output is correct
36 Correct 4 ms 972 KB Output is correct
37 Correct 4 ms 844 KB Output is correct
38 Correct 2 ms 844 KB Output is correct
39 Correct 4 ms 972 KB Output is correct
40 Correct 4 ms 880 KB Output is correct
41 Correct 4 ms 844 KB Output is correct
42 Correct 2 ms 844 KB Output is correct
43 Correct 3 ms 844 KB Output is correct
44 Correct 3 ms 844 KB Output is correct
45 Correct 3 ms 844 KB Output is correct
46 Correct 2 ms 844 KB Output is correct
47 Correct 4 ms 716 KB Output is correct
48 Correct 3 ms 804 KB Output is correct
49 Correct 3 ms 692 KB Output is correct
50 Correct 2 ms 724 KB Output is correct
51 Correct 2 ms 716 KB Output is correct
52 Correct 2 ms 716 KB Output is correct
53 Correct 2 ms 716 KB Output is correct
54 Correct 2 ms 716 KB Output is correct
55 Correct 4 ms 976 KB Output is correct
56 Correct 4 ms 972 KB Output is correct
57 Correct 4 ms 972 KB Output is correct
58 Correct 4 ms 980 KB Output is correct
59 Correct 4 ms 972 KB Output is correct
60 Correct 4 ms 972 KB Output is correct
61 Correct 4 ms 972 KB Output is correct
62 Correct 4 ms 1052 KB Output is correct
63 Correct 4 ms 980 KB Output is correct
64 Correct 2 ms 844 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 140 ms 20412 KB Output is correct
5 Correct 139 ms 20028 KB Output is correct
6 Correct 125 ms 19776 KB Output is correct
7 Correct 112 ms 19096 KB Output is correct
8 Correct 136 ms 20344 KB Output is correct
9 Correct 131 ms 20128 KB Output is correct
10 Correct 127 ms 19856 KB Output is correct
11 Correct 115 ms 19016 KB Output is correct
12 Correct 107 ms 17380 KB Output is correct
13 Correct 99 ms 17216 KB Output is correct
14 Correct 101 ms 17048 KB Output is correct
15 Correct 90 ms 16640 KB Output is correct
16 Correct 62 ms 13712 KB Output is correct
17 Correct 62 ms 13708 KB Output is correct
18 Correct 57 ms 13708 KB Output is correct
19 Correct 55 ms 12060 KB Output is correct
20 Correct 45 ms 11984 KB Output is correct
21 Correct 43 ms 12012 KB Output is correct
22 Correct 41 ms 11148 KB Output is correct
23 Correct 40 ms 11144 KB Output is correct
24 Correct 49 ms 11196 KB Output is correct
25 Correct 41 ms 10932 KB Output is correct
26 Correct 40 ms 10900 KB Output is correct
27 Correct 39 ms 10908 KB Output is correct
28 Correct 42 ms 13288 KB Output is correct
29 Correct 41 ms 13204 KB Output is correct
30 Correct 41 ms 13600 KB Output is correct
31 Correct 39 ms 12004 KB Output is correct
32 Correct 40 ms 11184 KB Output is correct
33 Correct 38 ms 11004 KB Output is correct
34 Correct 78 ms 15712 KB Output is correct
35 Correct 67 ms 14780 KB Output is correct
36 Correct 52 ms 13956 KB Output is correct
37 Correct 108 ms 15916 KB Output is correct
38 Correct 95 ms 15716 KB Output is correct
39 Correct 100 ms 15536 KB Output is correct
40 Correct 110 ms 15380 KB Output is correct
41 Correct 85 ms 15264 KB Output is correct
42 Correct 41 ms 13616 KB Output is correct
43 Correct 90 ms 15788 KB Output is correct
44 Correct 88 ms 15592 KB Output is correct
45 Correct 87 ms 15412 KB Output is correct
46 Correct 86 ms 15352 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 0 ms 332 KB Output is correct
50 Correct 0 ms 332 KB Output is correct
51 Correct 1 ms 332 KB Output is correct
52 Correct 1 ms 332 KB Output is correct
53 Correct 1 ms 332 KB Output is correct
54 Correct 1 ms 332 KB Output is correct
55 Correct 1 ms 332 KB Output is correct
56 Correct 1 ms 332 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 332 KB Output is correct
59 Correct 1 ms 332 KB Output is correct
60 Correct 1 ms 332 KB Output is correct
61 Correct 1 ms 332 KB Output is correct
62 Correct 1 ms 332 KB Output is correct
63 Correct 1 ms 332 KB Output is correct
64 Correct 1 ms 332 KB Output is correct
65 Correct 1 ms 332 KB Output is correct
66 Correct 1 ms 332 KB Output is correct
67 Correct 1 ms 332 KB Output is correct
68 Correct 1 ms 328 KB Output is correct
69 Correct 1 ms 332 KB Output is correct
70 Correct 1 ms 332 KB Output is correct
71 Correct 1 ms 332 KB Output is correct
72 Correct 1 ms 332 KB Output is correct
73 Correct 1 ms 320 KB Output is correct
74 Correct 2 ms 716 KB Output is correct
75 Correct 2 ms 752 KB Output is correct
76 Correct 2 ms 716 KB Output is correct
77 Correct 3 ms 716 KB Output is correct
78 Correct 2 ms 716 KB Output is correct
79 Correct 2 ms 720 KB Output is correct
80 Correct 2 ms 716 KB Output is correct
81 Correct 5 ms 972 KB Output is correct
82 Correct 4 ms 972 KB Output is correct
83 Correct 4 ms 844 KB Output is correct
84 Correct 2 ms 844 KB Output is correct
85 Correct 4 ms 972 KB Output is correct
86 Correct 4 ms 880 KB Output is correct
87 Correct 4 ms 844 KB Output is correct
88 Correct 2 ms 844 KB Output is correct
89 Correct 3 ms 844 KB Output is correct
90 Correct 3 ms 844 KB Output is correct
91 Correct 3 ms 844 KB Output is correct
92 Correct 2 ms 844 KB Output is correct
93 Correct 4 ms 716 KB Output is correct
94 Correct 3 ms 804 KB Output is correct
95 Correct 3 ms 692 KB Output is correct
96 Correct 2 ms 724 KB Output is correct
97 Correct 2 ms 716 KB Output is correct
98 Correct 2 ms 716 KB Output is correct
99 Correct 2 ms 716 KB Output is correct
100 Correct 2 ms 716 KB Output is correct
101 Correct 4 ms 976 KB Output is correct
102 Correct 4 ms 972 KB Output is correct
103 Correct 4 ms 972 KB Output is correct
104 Correct 4 ms 980 KB Output is correct
105 Correct 4 ms 972 KB Output is correct
106 Correct 4 ms 972 KB Output is correct
107 Correct 4 ms 972 KB Output is correct
108 Correct 4 ms 1052 KB Output is correct
109 Correct 4 ms 980 KB Output is correct
110 Correct 2 ms 844 KB Output is correct
111 Correct 54 ms 12852 KB Output is correct
112 Correct 72 ms 12816 KB Output is correct
113 Correct 57 ms 12860 KB Output is correct
114 Correct 52 ms 12844 KB Output is correct
115 Correct 53 ms 12872 KB Output is correct
116 Correct 49 ms 12900 KB Output is correct
117 Correct 49 ms 12848 KB Output is correct
118 Correct 277 ms 22488 KB Output is correct
119 Correct 236 ms 21760 KB Output is correct
120 Correct 169 ms 18496 KB Output is correct
121 Correct 60 ms 15152 KB Output is correct
122 Correct 188 ms 19392 KB Output is correct
123 Correct 162 ms 18924 KB Output is correct
124 Correct 143 ms 18476 KB Output is correct
125 Correct 57 ms 15124 KB Output is correct
126 Correct 115 ms 15640 KB Output is correct
127 Correct 110 ms 15788 KB Output is correct
128 Correct 86 ms 15768 KB Output is correct
129 Correct 53 ms 15516 KB Output is correct
130 Correct 69 ms 13976 KB Output is correct
131 Correct 67 ms 13980 KB Output is correct
132 Correct 67 ms 13996 KB Output is correct
133 Correct 50 ms 13908 KB Output is correct
134 Correct 68 ms 13060 KB Output is correct
135 Correct 58 ms 13076 KB Output is correct
136 Correct 54 ms 13084 KB Output is correct
137 Correct 47 ms 13104 KB Output is correct
138 Correct 61 ms 12840 KB Output is correct
139 Correct 52 ms 12868 KB Output is correct
140 Correct 54 ms 12952 KB Output is correct
141 Correct 65 ms 12880 KB Output is correct
142 Correct 145 ms 22876 KB Output is correct
143 Correct 143 ms 22852 KB Output is correct
144 Correct 142 ms 22832 KB Output is correct
145 Correct 128 ms 22812 KB Output is correct
146 Correct 124 ms 22700 KB Output is correct
147 Correct 159 ms 22520 KB Output is correct
148 Correct 125 ms 22396 KB Output is correct
149 Correct 125 ms 22184 KB Output is correct
150 Correct 121 ms 22060 KB Output is correct
151 Correct 109 ms 21292 KB Output is correct
152 Correct 42 ms 15284 KB Output is correct
153 Correct 128 ms 22816 KB Output is correct
154 Correct 131 ms 22700 KB Output is correct
155 Correct 127 ms 22480 KB Output is correct
156 Correct 123 ms 22424 KB Output is correct
157 Correct 134 ms 22216 KB Output is correct
158 Correct 130 ms 22160 KB Output is correct
159 Correct 114 ms 21420 KB Output is correct
160 Correct 44 ms 15264 KB Output is correct
161 Correct 168 ms 18920 KB Output is correct
162 Correct 165 ms 18872 KB Output is correct
163 Correct 193 ms 18756 KB Output is correct
164 Correct 143 ms 18524 KB Output is correct
165 Correct 159 ms 18384 KB Output is correct
166 Correct 44 ms 15508 KB Output is correct
167 Correct 102 ms 17700 KB Output is correct
168 Correct 98 ms 17584 KB Output is correct
169 Correct 91 ms 17364 KB Output is correct
170 Correct 93 ms 17200 KB Output is correct
171 Correct 106 ms 18372 KB Output is correct
172 Correct 102 ms 18984 KB Output is correct
173 Correct 231 ms 19044 KB Output is correct
174 Correct 191 ms 19008 KB Output is correct
175 Correct 178 ms 19008 KB Output is correct
176 Correct 166 ms 18288 KB Output is correct