oj.uz

Submission #417138

# Submission time Handle Problem Language Result Execution time Memory
417138 2021-06-03T12:06:35 Z jamezzz Event Hopping 2 (JOI21_event2) C++14
39 / 100
 478 ms 4572 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 INF 1023456789
#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 val[100005],sfx[100005],pos[100005];

void sorted(){
	bool can=false;
	for(int i=n-1;i>=0;--i){
		pos[i]=lower_bound(v.begin()+i+1,v.end(),
								ii(v[i].se,0))-v.begin();
		val[i]=sfx[pos[i]]+1;
		if(val[i]>=k)can=true;
		sfx[i]=max(sfx[i+1],val[i]);
	}
	if(!can)pf("-1\n"),exit(0);
	int c=0;
	for(int i=0;i<k;++i){
		for(int j=c;j<n;++j){
			if(i+val[j]>=k){
				pf("%d\n",j+1);
				c=pos[j];
				break;
			}
		}
	}
	exit(0);
}

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);
	}
	if(n>3000)sorted();
	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
6 8
8 9
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:59:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |  sf("%d%d",&n,&k);
      |    ^
event2.cpp:61:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |   sf("%d%d",&l,&r);
      |     ^

Subtask #1
7.0 / 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 1 ms 204 KB Output is correct
4 Correct 39 ms 2828 KB Output is correct
5 Correct 40 ms 2852 KB Output is correct
6 Correct 38 ms 2828 KB Output is correct
7 Correct 48 ms 2744 KB Output is correct
8 Correct 39 ms 2904 KB Output is correct
9 Correct 39 ms 2764 KB Output is correct
10 Correct 38 ms 2744 KB Output is correct
11 Correct 37 ms 2796 KB Output is correct
12 Correct 48 ms 2700 KB Output is correct
13 Correct 36 ms 4536 KB Output is correct
14 Correct 38 ms 4536 KB Output is correct
15 Correct 41 ms 4572 KB Output is correct
16 Correct 36 ms 4360 KB Output is correct
17 Correct 33 ms 4332 KB Output is correct
18 Correct 34 ms 4280 KB Output is correct
19 Correct 36 ms 4256 KB Output is correct
20 Correct 34 ms 4268 KB Output is correct
21 Correct 33 ms 4232 KB Output is correct
22 Correct 35 ms 4284 KB Output is correct
23 Correct 37 ms 4220 KB Output is correct
24 Correct 36 ms 4260 KB Output is correct
25 Correct 38 ms 4284 KB Output is correct
26 Correct 37 ms 4288 KB Output is correct
27 Correct 43 ms 4280 KB Output is correct
28 Correct 30 ms 4272 KB Output is correct
29 Correct 41 ms 4280 KB Output is correct
30 Correct 31 ms 4220 KB Output is correct
31 Correct 33 ms 4200 KB Output is correct
32 Correct 47 ms 4280 KB Output is correct
33 Correct 37 ms 4276 KB Output is correct
34 Correct 35 ms 4516 KB Output is correct
35 Correct 33 ms 4332 KB Output is correct
36 Correct 35 ms 4276 KB Output is correct
37 Correct 59 ms 4544 KB Output is correct
38 Correct 36 ms 4508 KB Output is correct
39 Correct 35 ms 4536 KB Output is correct
40 Correct 36 ms 4476 KB Output is correct
41 Correct 35 ms 4540 KB Output is correct
42 Correct 31 ms 4260 KB Output is correct
43 Correct 36 ms 4516 KB Output is correct
44 Correct 37 ms 4568 KB Output is correct
45 Correct 35 ms 4496 KB Output is correct
46 Correct 36 ms 4472 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 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 276 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 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 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 0 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 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 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 276 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 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 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 0 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 33 ms 332 KB Output is correct
29 Correct 33 ms 332 KB Output is correct
30 Correct 19 ms 332 KB Output is correct
31 Correct 8 ms 400 KB Output is correct
32 Correct 4 ms 332 KB Output is correct
33 Correct 274 ms 380 KB Output is correct
34 Correct 279 ms 380 KB Output is correct
35 Correct 478 ms 452 KB Output is correct
36 Correct 422 ms 376 KB Output is correct
37 Correct 368 ms 392 KB Output is correct
38 Correct 284 ms 332 KB Output is correct
39 Correct 380 ms 392 KB Output is correct
40 Correct 410 ms 376 KB Output is correct
41 Correct 373 ms 416 KB Output is correct
42 Correct 321 ms 384 KB Output is correct
43 Correct 219 ms 380 KB Output is correct
44 Correct 177 ms 380 KB Output is correct
45 Correct 151 ms 384 KB Output is correct
46 Correct 288 ms 380 KB Output is correct
47 Correct 95 ms 376 KB Output is correct
48 Correct 57 ms 376 KB Output is correct
49 Correct 30 ms 332 KB Output is correct
50 Correct 295 ms 380 KB Output is correct
51 Correct 97 ms 380 KB Output is correct
52 Correct 71 ms 332 KB Output is correct
53 Correct 13 ms 332 KB Output is correct
54 Correct 273 ms 384 KB Output is correct
55 Correct 187 ms 440 KB Output is correct
56 Correct 168 ms 416 KB Output is correct
57 Correct 165 ms 384 KB Output is correct
58 Correct 167 ms 512 KB Output is correct
59 Correct 192 ms 384 KB Output is correct
60 Correct 158 ms 464 KB Output is correct
61 Correct 183 ms 408 KB Output is correct
62 Correct 175 ms 384 KB Output is correct
63 Correct 147 ms 416 KB Output is correct
64 Correct 111 ms 384 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 1 ms 204 KB Output is correct
4 Correct 39 ms 2828 KB Output is correct
5 Correct 40 ms 2852 KB Output is correct
6 Correct 38 ms 2828 KB Output is correct
7 Correct 48 ms 2744 KB Output is correct
8 Correct 39 ms 2904 KB Output is correct
9 Correct 39 ms 2764 KB Output is correct
10 Correct 38 ms 2744 KB Output is correct
11 Correct 37 ms 2796 KB Output is correct
12 Correct 48 ms 2700 KB Output is correct
13 Correct 36 ms 4536 KB Output is correct
14 Correct 38 ms 4536 KB Output is correct
15 Correct 41 ms 4572 KB Output is correct
16 Correct 36 ms 4360 KB Output is correct
17 Correct 33 ms 4332 KB Output is correct
18 Correct 34 ms 4280 KB Output is correct
19 Correct 36 ms 4256 KB Output is correct
20 Correct 34 ms 4268 KB Output is correct
21 Correct 33 ms 4232 KB Output is correct
22 Correct 35 ms 4284 KB Output is correct
23 Correct 37 ms 4220 KB Output is correct
24 Correct 36 ms 4260 KB Output is correct
25 Correct 38 ms 4284 KB Output is correct
26 Correct 37 ms 4288 KB Output is correct
27 Correct 43 ms 4280 KB Output is correct
28 Correct 30 ms 4272 KB Output is correct
29 Correct 41 ms 4280 KB Output is correct
30 Correct 31 ms 4220 KB Output is correct
31 Correct 33 ms 4200 KB Output is correct
32 Correct 47 ms 4280 KB Output is correct
33 Correct 37 ms 4276 KB Output is correct
34 Correct 35 ms 4516 KB Output is correct
35 Correct 33 ms 4332 KB Output is correct
36 Correct 35 ms 4276 KB Output is correct
37 Correct 59 ms 4544 KB Output is correct
38 Correct 36 ms 4508 KB Output is correct
39 Correct 35 ms 4536 KB Output is correct
40 Correct 36 ms 4476 KB Output is correct
41 Correct 35 ms 4540 KB Output is correct
42 Correct 31 ms 4260 KB Output is correct
43 Correct 36 ms 4516 KB Output is correct
44 Correct 37 ms 4568 KB Output is correct
45 Correct 35 ms 4496 KB Output is correct
46 Correct 36 ms 4472 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 1 ms 204 KB Output is correct
50 Correct 1 ms 204 KB Output is correct
51 Correct 1 ms 204 KB Output is correct
52 Correct 1 ms 204 KB Output is correct
53 Correct 1 ms 204 KB Output is correct
54 Correct 1 ms 204 KB Output is correct
55 Correct 1 ms 276 KB Output is correct
56 Correct 0 ms 204 KB Output is correct
57 Correct 1 ms 204 KB Output is correct
58 Correct 1 ms 204 KB Output is correct
59 Correct 0 ms 204 KB Output is correct
60 Correct 1 ms 204 KB Output is correct
61 Correct 0 ms 204 KB Output is correct
62 Correct 1 ms 204 KB Output is correct
63 Correct 1 ms 204 KB Output is correct
64 Correct 1 ms 204 KB Output is correct
65 Correct 1 ms 204 KB Output is correct
66 Correct 1 ms 204 KB Output is correct
67 Correct 1 ms 204 KB Output is correct
68 Correct 1 ms 204 KB Output is correct
69 Correct 1 ms 204 KB Output is correct
70 Correct 1 ms 204 KB Output is correct
71 Correct 0 ms 204 KB Output is correct
72 Correct 1 ms 204 KB Output is correct
73 Correct 1 ms 204 KB Output is correct
74 Correct 33 ms 332 KB Output is correct
75 Correct 33 ms 332 KB Output is correct
76 Correct 19 ms 332 KB Output is correct
77 Correct 8 ms 400 KB Output is correct
78 Correct 4 ms 332 KB Output is correct
79 Correct 274 ms 380 KB Output is correct
80 Correct 279 ms 380 KB Output is correct
81 Correct 478 ms 452 KB Output is correct
82 Correct 422 ms 376 KB Output is correct
83 Correct 368 ms 392 KB Output is correct
84 Correct 284 ms 332 KB Output is correct
85 Correct 380 ms 392 KB Output is correct
86 Correct 410 ms 376 KB Output is correct
87 Correct 373 ms 416 KB Output is correct
88 Correct 321 ms 384 KB Output is correct
89 Correct 219 ms 380 KB Output is correct
90 Correct 177 ms 380 KB Output is correct
91 Correct 151 ms 384 KB Output is correct
92 Correct 288 ms 380 KB Output is correct
93 Correct 95 ms 376 KB Output is correct
94 Correct 57 ms 376 KB Output is correct
95 Correct 30 ms 332 KB Output is correct
96 Correct 295 ms 380 KB Output is correct
97 Correct 97 ms 380 KB Output is correct
98 Correct 71 ms 332 KB Output is correct
99 Correct 13 ms 332 KB Output is correct
100 Correct 273 ms 384 KB Output is correct
101 Correct 187 ms 440 KB Output is correct
102 Correct 168 ms 416 KB Output is correct
103 Correct 165 ms 384 KB Output is correct
104 Correct 167 ms 512 KB Output is correct
105 Correct 192 ms 384 KB Output is correct
106 Correct 158 ms 464 KB Output is correct
107 Correct 183 ms 408 KB Output is correct
108 Correct 175 ms 384 KB Output is correct
109 Correct 147 ms 416 KB Output is correct
110 Correct 111 ms 384 KB Output is correct
111 Incorrect 38 ms 4276 KB Output isn't correct
112 Halted 0 ms 0 KB -