#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]=upper_bound(v.begin()+i+1,v.end(),
ii(v[i].se,INF))-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);
| ^
# |
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 |
Incorrect |
29 ms |
2356 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
204 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
1 ms |
204 KB |
Output is correct |
6 |
Correct |
0 ms |
204 KB |
Output is correct |
7 |
Correct |
1 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 |
1 ms |
204 KB |
Output is correct |
15 |
Correct |
0 ms |
204 KB |
Output is correct |
16 |
Correct |
0 ms |
204 KB |
Output is correct |
17 |
Correct |
0 ms |
204 KB |
Output is correct |
18 |
Correct |
0 ms |
204 KB |
Output is correct |
19 |
Correct |
1 ms |
204 KB |
Output is correct |
20 |
Correct |
0 ms |
204 KB |
Output is correct |
21 |
Correct |
0 ms |
204 KB |
Output is correct |
22 |
Correct |
1 ms |
204 KB |
Output is correct |
23 |
Correct |
0 ms |
204 KB |
Output is correct |
24 |
Correct |
0 ms |
204 KB |
Output is correct |
25 |
Correct |
0 ms |
204 KB |
Output is correct |
26 |
Correct |
0 ms |
204 KB |
Output is correct |
27 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
204 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
1 ms |
204 KB |
Output is correct |
6 |
Correct |
0 ms |
204 KB |
Output is correct |
7 |
Correct |
1 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 |
1 ms |
204 KB |
Output is correct |
15 |
Correct |
0 ms |
204 KB |
Output is correct |
16 |
Correct |
0 ms |
204 KB |
Output is correct |
17 |
Correct |
0 ms |
204 KB |
Output is correct |
18 |
Correct |
0 ms |
204 KB |
Output is correct |
19 |
Correct |
1 ms |
204 KB |
Output is correct |
20 |
Correct |
0 ms |
204 KB |
Output is correct |
21 |
Correct |
0 ms |
204 KB |
Output is correct |
22 |
Correct |
1 ms |
204 KB |
Output is correct |
23 |
Correct |
0 ms |
204 KB |
Output is correct |
24 |
Correct |
0 ms |
204 KB |
Output is correct |
25 |
Correct |
0 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 |
33 ms |
332 KB |
Output is correct |
29 |
Correct |
33 ms |
452 KB |
Output is correct |
30 |
Correct |
17 ms |
400 KB |
Output is correct |
31 |
Correct |
6 ms |
400 KB |
Output is correct |
32 |
Correct |
4 ms |
332 KB |
Output is correct |
33 |
Correct |
271 ms |
380 KB |
Output is correct |
34 |
Correct |
269 ms |
332 KB |
Output is correct |
35 |
Correct |
419 ms |
452 KB |
Output is correct |
36 |
Correct |
415 ms |
392 KB |
Output is correct |
37 |
Correct |
351 ms |
380 KB |
Output is correct |
38 |
Correct |
281 ms |
332 KB |
Output is correct |
39 |
Correct |
379 ms |
388 KB |
Output is correct |
40 |
Correct |
374 ms |
392 KB |
Output is correct |
41 |
Correct |
355 ms |
380 KB |
Output is correct |
42 |
Correct |
281 ms |
380 KB |
Output is correct |
43 |
Correct |
205 ms |
392 KB |
Output is correct |
44 |
Correct |
162 ms |
332 KB |
Output is correct |
45 |
Correct |
145 ms |
332 KB |
Output is correct |
46 |
Correct |
305 ms |
380 KB |
Output is correct |
47 |
Correct |
89 ms |
332 KB |
Output is correct |
48 |
Correct |
58 ms |
376 KB |
Output is correct |
49 |
Correct |
27 ms |
384 KB |
Output is correct |
50 |
Correct |
284 ms |
380 KB |
Output is correct |
51 |
Correct |
97 ms |
380 KB |
Output is correct |
52 |
Correct |
70 ms |
384 KB |
Output is correct |
53 |
Correct |
13 ms |
400 KB |
Output is correct |
54 |
Correct |
277 ms |
376 KB |
Output is correct |
55 |
Correct |
171 ms |
388 KB |
Output is correct |
56 |
Correct |
166 ms |
380 KB |
Output is correct |
57 |
Correct |
159 ms |
380 KB |
Output is correct |
58 |
Correct |
174 ms |
376 KB |
Output is correct |
59 |
Correct |
174 ms |
516 KB |
Output is correct |
60 |
Correct |
163 ms |
376 KB |
Output is correct |
61 |
Correct |
171 ms |
448 KB |
Output is correct |
62 |
Correct |
160 ms |
380 KB |
Output is correct |
63 |
Correct |
169 ms |
392 KB |
Output is correct |
64 |
Correct |
86 ms |
336 KB |
Output is correct |
# |
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 |
Incorrect |
29 ms |
2356 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |