oj.uz

Submission #417047

# Submission time Handle Problem Language Result Execution time Memory
417047 2021-06-03T11:04:58 Z jamezzz Event Hopping 2 (JOI21_event2) C++14
32 / 100
 3000 ms 2488 KB 
#include <bits/stdc++.h>
using namespace std;

#define sf scanf
#define pf printf
#define fi first
#define se second
#define pb emplace_back
#define all(x) x.begin(),x.end()
#define sz(x) (int)x.size()
typedef pair<int,int> ii;

int n,k,l,r;
vector<ii> v,t;
multiset<ii> s;

int num(int x){
	t.clear();
	for(int i=x;i<n;++i)t.pb(v[i]);
	sort(all(t),[&](ii &a,ii &b){return a.se<b.se;});
	int curr=-1,cnt=0;
	for(int i=0;i<sz(t);++i){
		if(t[i].fi<curr)continue;
		auto it=s.lower_bound(ii(t[i].fi,0));
		if(it!=s.end()&&(*it).fi<t[i].se)continue;
		if(it!=s.begin()&&t[i].fi<(*--it).se)continue;
		curr=t[i].se;++cnt;
	}
	return cnt;
}

int main(){
	sf("%d%d",&n,&k);
	for(int i=0;i<n;++i){
		sf("%d%d",&l,&r);
		v.pb(l,r);
	}
	int cnt=1;
	bool pos=false;
	for(int i=0;i<n;++i){
		
		auto it=s.lower_bound(ii(v[i].fi,0));
		if(it!=s.end()&&(*it).fi<v[i].se)continue;
		if(it!=s.begin()&&v[i].fi<(*--it).se)continue;
		
		s.insert(ii(v[i].fi,v[i].se));
		
		int tot=num(i+1)+cnt;
		if(tot>=k){
			pos=true;
			if(cnt==k)break;
			++cnt;
			continue;
		}
		else s.erase(s.find(v[i]));
	}
	if(!pos)pf("-1\n"),exit(0);
	
	for(int i=0;i<n;++i){
		if(s.count(v[i])){
			pf("%d\n",i+1);
			s.erase(s.find(v[i]));
		}
	}
}

/*
5 4
1 3
2 5
8 9
6 8
10 15

4 3
1 4
3 5
4 9
7 10

10 6
77412002 93858605
244306432 318243514
280338037 358494212
439397354 492065507
485779890 529132783
571714810 632053254
659767854 709114867
718405631 733610573
786950301 815106357
878719468 899999649
*/

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:33:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |  sf("%d%d",&n,&k);
      |    ^
event2.cpp:35:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |   sf("%d%d",&l,&r);
      |     ^

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 240 KB Output is correct
4 Execution timed out 3061 ms 2488 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #2
1.0 / 1.0

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

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 0 ms 204 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 35 ms 332 KB Output is correct
29 Correct 31 ms 332 KB Output is correct
30 Correct 17 ms 392 KB Output is correct
31 Correct 6 ms 332 KB Output is correct
32 Correct 3 ms 332 KB Output is correct
33 Correct 270 ms 384 KB Output is correct
34 Correct 268 ms 368 KB Output is correct
35 Correct 416 ms 480 KB Output is correct
36 Correct 410 ms 444 KB Output is correct
37 Correct 350 ms 500 KB Output is correct
38 Correct 275 ms 372 KB Output is correct
39 Correct 377 ms 452 KB Output is correct
40 Correct 374 ms 436 KB Output is correct
41 Correct 351 ms 332 KB Output is correct
42 Correct 278 ms 368 KB Output is correct
43 Correct 196 ms 332 KB Output is correct
44 Correct 162 ms 368 KB Output is correct
45 Correct 142 ms 332 KB Output is correct
46 Correct 278 ms 332 KB Output is correct
47 Correct 88 ms 332 KB Output is correct
48 Correct 56 ms 368 KB Output is correct
49 Correct 26 ms 372 KB Output is correct
50 Correct 265 ms 372 KB Output is correct
51 Correct 94 ms 332 KB Output is correct
52 Correct 67 ms 332 KB Output is correct
53 Correct 11 ms 392 KB Output is correct
54 Correct 261 ms 332 KB Output is correct
55 Correct 152 ms 452 KB Output is correct
56 Correct 152 ms 368 KB Output is correct
57 Correct 149 ms 404 KB Output is correct
58 Correct 148 ms 384 KB Output is correct
59 Correct 151 ms 580 KB Output is correct
60 Correct 148 ms 452 KB Output is correct
61 Correct 149 ms 424 KB Output is correct
62 Correct 153 ms 452 KB Output is correct
63 Correct 148 ms 380 KB Output is correct
64 Correct 82 ms 332 KB Output is correct

Subtask #4
0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 240 KB Output is correct
4 Execution timed out 3061 ms 2488 KB Time limit exceeded
5 Halted 0 ms 0 KB -