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Submission #1076629

# Submission time Handle Problem Language Result Execution time Memory
1076629 2024-08-26T15:08:15 Z AlphaBruh Event Hopping (BOI22_events) C++17
100 / 100
 70 ms 14796 KB 
#include<bits/stdc++.h>
using namespace std;
#define SIZE 100005
struct rg{
	int id,l,r;
	bool operator<(rg x){
		if(r!=x.r) return r<x.r;
		return l<x.l;
	}
}rgs[SIZE];
int n,q;
int arr[SIZE];
int lb(int x){return x&-x;}
int minl(int a, int b){return rgs[a].l<rgs[b].l?a:b;}
void edit(int loc, int v){
	while(loc<=n){
		arr[loc]=minl(arr[loc],v);
		loc+=lb(loc);
	}
}
int get(int loc){
	int ret=0;
	while(loc){
		ret=minl(ret,arr[loc]);
		loc-=lb(loc);
	}
	return ret;
}
int rid[SIZE];
int irg[SIZE];
int bz[20][SIZE];
void cal(int id){
	int l=1,r=id,md;
	while(l<r){
		md=(l+r)>>1;
		if(rgs[md].r<rgs[id].l) l=md+1;
		else r=md;
	}
	if(r==id) bz[0][id]=id;
	else bz[0][id]=get(n-r+1);
	irg[id]=r;
	edit(n-id+1,id);
}
int PID;
int build(){
	int pid,p;
	for(pid=1,p=2;p<=n;p<<=1,pid++){
		for(int i=1;i<=n;i++){
			bz[pid][i]=bz[pid-1][bz[pid-1][i]];
		}
	}
	return pid;
}
void query(){
	int u,a;
	cin>>u>>a;
	a=rid[a];
	u=rid[u];
	if(rgs[a].r==rgs[u].r){
		printf("%d\n",int(a!=u));
		return;
	}
	if(a<u){
		printf("impossible\n");
		return;
	}
	int cnt=0;
	for(int pid=PID,p=1<<PID;pid>=0;pid--,p>>=1){
		if(u<irg[bz[pid][a]]){
			a=bz[pid][a];
			cnt+=p;
		}
	}
	if(irg[a]<=u){
		printf("1\n");
		return;
	}
	a=bz[0][a];
	if(u < irg[a]) printf("impossible\n");
	else printf("%d\n",cnt+2);
	return;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin>>n>>q;
	for(int i=1;i<=n;i++){
		rgs[i].id=i;
		cin>>rgs[i].l>>rgs[i].r;
	}
	sort(rgs+1,rgs+1+n);
	rgs[0].l=2e9;
	for(int i=1;i<=n;i++){
		rid[rgs[i].id]=i;
		cal(i);
	}
	PID=build();
	while(q--) query();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 62 ms 14132 KB Output is correct
3 Correct 48 ms 14160 KB Output is correct
4 Correct 52 ms 14260 KB Output is correct
5 Correct 55 ms 14160 KB Output is correct
6 Correct 53 ms 14164 KB Output is correct
7 Correct 51 ms 14360 KB Output is correct
8 Correct 46 ms 14672 KB Output is correct
9 Correct 50 ms 14796 KB Output is correct
10 Correct 54 ms 14672 KB Output is correct
11 Correct 56 ms 14672 KB Output is correct
12 Correct 39 ms 13916 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4440 KB Output is correct
3 Correct 1 ms 6668 KB Output is correct
4 Correct 1 ms 6648 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6488 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4440 KB Output is correct
3 Correct 1 ms 6668 KB Output is correct
4 Correct 1 ms 6648 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6488 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4556 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6648 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 1 ms 6492 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 23 ms 10204 KB Output is correct
20 Correct 20 ms 10076 KB Output is correct
21 Correct 25 ms 10332 KB Output is correct
22 Correct 19 ms 10584 KB Output is correct
23 Correct 17 ms 10332 KB Output is correct
24 Correct 18 ms 10332 KB Output is correct
25 Correct 19 ms 10076 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4440 KB Output is correct
3 Correct 1 ms 6668 KB Output is correct
4 Correct 1 ms 6648 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6488 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 2 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 2 ms 7004 KB Output is correct
18 Correct 1 ms 6488 KB Output is correct
19 Correct 33 ms 12376 KB Output is correct
20 Correct 25 ms 11608 KB Output is correct
21 Correct 32 ms 12360 KB Output is correct
22 Correct 28 ms 12368 KB Output is correct
23 Correct 27 ms 12380 KB Output is correct
24 Correct 29 ms 12536 KB Output is correct
25 Correct 19 ms 11868 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 14156 KB Output is correct
2 Correct 47 ms 14160 KB Output is correct
3 Correct 58 ms 14184 KB Output is correct
4 Correct 59 ms 14580 KB Output is correct
5 Correct 56 ms 14676 KB Output is correct
6 Correct 70 ms 14416 KB Output is correct
7 Correct 55 ms 14420 KB Output is correct
8 Correct 57 ms 14416 KB Output is correct
9 Correct 27 ms 12368 KB Output is correct
10 Correct 48 ms 13904 KB Output is correct
11 Correct 52 ms 13652 KB Output is correct
12 Correct 50 ms 13904 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 62 ms 14132 KB Output is correct
3 Correct 48 ms 14160 KB Output is correct
4 Correct 52 ms 14260 KB Output is correct
5 Correct 55 ms 14160 KB Output is correct
6 Correct 53 ms 14164 KB Output is correct
7 Correct 51 ms 14360 KB Output is correct
8 Correct 46 ms 14672 KB Output is correct
9 Correct 50 ms 14796 KB Output is correct
10 Correct 54 ms 14672 KB Output is correct
11 Correct 56 ms 14672 KB Output is correct
12 Correct 39 ms 13916 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4440 KB Output is correct
15 Correct 1 ms 6668 KB Output is correct
16 Correct 1 ms 6648 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6488 KB Output is correct
19 Correct 1 ms 6492 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 1 ms 6492 KB Output is correct
22 Correct 1 ms 4444 KB Output is correct
23 Correct 1 ms 4556 KB Output is correct
24 Correct 1 ms 6492 KB Output is correct
25 Correct 1 ms 6648 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 1 ms 6492 KB Output is correct
28 Correct 1 ms 6492 KB Output is correct
29 Correct 1 ms 6492 KB Output is correct
30 Correct 1 ms 6492 KB Output is correct
31 Correct 23 ms 10204 KB Output is correct
32 Correct 20 ms 10076 KB Output is correct
33 Correct 25 ms 10332 KB Output is correct
34 Correct 19 ms 10584 KB Output is correct
35 Correct 17 ms 10332 KB Output is correct
36 Correct 18 ms 10332 KB Output is correct
37 Correct 19 ms 10076 KB Output is correct
38 Correct 1 ms 4444 KB Output is correct
39 Correct 1 ms 4444 KB Output is correct
40 Correct 1 ms 6492 KB Output is correct
41 Correct 1 ms 6492 KB Output is correct
42 Correct 1 ms 6492 KB Output is correct
43 Correct 2 ms 6492 KB Output is correct
44 Correct 1 ms 6492 KB Output is correct
45 Correct 2 ms 7004 KB Output is correct
46 Correct 1 ms 6488 KB Output is correct
47 Correct 33 ms 12376 KB Output is correct
48 Correct 25 ms 11608 KB Output is correct
49 Correct 32 ms 12360 KB Output is correct
50 Correct 28 ms 12368 KB Output is correct
51 Correct 27 ms 12380 KB Output is correct
52 Correct 29 ms 12536 KB Output is correct
53 Correct 19 ms 11868 KB Output is correct
54 Correct 57 ms 14156 KB Output is correct
55 Correct 47 ms 14160 KB Output is correct
56 Correct 58 ms 14184 KB Output is correct
57 Correct 59 ms 14580 KB Output is correct
58 Correct 56 ms 14676 KB Output is correct
59 Correct 70 ms 14416 KB Output is correct
60 Correct 55 ms 14420 KB Output is correct
61 Correct 57 ms 14416 KB Output is correct
62 Correct 27 ms 12368 KB Output is correct
63 Correct 48 ms 13904 KB Output is correct
64 Correct 52 ms 13652 KB Output is correct
65 Correct 50 ms 13904 KB Output is correct
66 Correct 1 ms 4440 KB Output is correct
67 Correct 47 ms 14164 KB Output is correct
68 Correct 48 ms 14160 KB Output is correct
69 Correct 55 ms 14088 KB Output is correct
70 Correct 51 ms 14160 KB Output is correct
71 Correct 51 ms 14160 KB Output is correct
72 Correct 50 ms 14420 KB Output is correct
73 Correct 54 ms 14676 KB Output is correct
74 Correct 46 ms 14792 KB Output is correct
75 Correct 56 ms 14484 KB Output is correct
76 Correct 55 ms 14676 KB Output is correct
77 Correct 40 ms 13988 KB Output is correct
78 Correct 1 ms 4440 KB Output is correct
79 Correct 2 ms 6492 KB Output is correct
80 Correct 1 ms 6648 KB Output is correct
81 Correct 1 ms 6492 KB Output is correct
82 Correct 1 ms 6492 KB Output is correct
83 Correct 1 ms 6492 KB Output is correct
84 Correct 1 ms 6492 KB Output is correct
85 Correct 1 ms 6492 KB Output is correct
86 Correct 22 ms 10004 KB Output is correct
87 Correct 20 ms 10232 KB Output is correct
88 Correct 23 ms 10460 KB Output is correct
89 Correct 18 ms 10584 KB Output is correct
90 Correct 17 ms 10328 KB Output is correct
91 Correct 21 ms 10332 KB Output is correct
92 Correct 19 ms 9952 KB Output is correct
93 Correct 30 ms 12472 KB Output is correct
94 Correct 25 ms 11600 KB Output is correct
95 Correct 31 ms 12368 KB Output is correct
96 Correct 29 ms 12380 KB Output is correct
97 Correct 29 ms 12364 KB Output is correct
98 Correct 28 ms 12372 KB Output is correct
99 Correct 20 ms 11860 KB Output is correct
100 Correct 57 ms 14368 KB Output is correct
101 Correct 58 ms 14416 KB Output is correct
102 Correct 56 ms 14416 KB Output is correct
103 Correct 46 ms 13904 KB Output is correct
104 Correct 49 ms 13648 KB Output is correct
105 Correct 48 ms 13908 KB Output is correct
106 Correct 54 ms 13652 KB Output is correct
107 Correct 60 ms 13512 KB Output is correct
108 Correct 51 ms 14412 KB Output is correct
109 Correct 52 ms 14416 KB Output is correct
110 Correct 56 ms 14288 KB Output is correct
111 Correct 57 ms 14196 KB Output is correct