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Submission #1095815

# Submission time Handle Problem Language Result Execution time Memory
1095815 2024-10-03T08:43:53 Z epicci23 Fire (BOI24_fire) C++17
100 / 100
 169 ms 32064 KB 
#include "bits/stdc++.h"
//#define int long long
#define all(v) v.begin() , v.end()
#define sz(a) (int)a.size()
using namespace std;

const int N = 2e5 + 5;
const int LOG = 20;

int lift[N][LOG];
vector<array<int,2>> v;
vector<array<int,2>> ar;
struct SegT{
  int n;
  vector<int> seg;
  SegT(int _n){
  	n=_n;
  	seg.assign(4*n+5,-1);
  }
  int merge(int a,int b){
  	if(a==-1 || b==-1) return (a==-1 ? b : a);
  	if(ar[a][1]>ar[b][1]) return a;
  	return b;
  }
  void update(int rt,int l,int r,int ind,int u){
  	if(r<ind || l>ind) return;
  	if(l==r){
  	 seg[rt]=merge(seg[rt],u);
  	 return;
  	}
  	int m=(l+r)/2;
  	update(rt*2,l,m,ind,u),update(rt*2+1,m+1,r,ind,u);
  	seg[rt]=merge(seg[rt*2],seg[rt*2+1]);
  }
  int query(int rt,int l,int r,int gl,int gr){
    if(r<gl || l>gr) return -1;
    if(l>=gl && r<=gr) return seg[rt];
    int m=(l+r)/2;
    return merge(query(rt*2,l,m,gl,gr),query(rt*2+1,m+1,r,gl,gr));
  }
};

void _(){
  int n,m;
  cin >> n >> m;
  for(int i=0;i<n;i++){
  	int a,b;
  	cin >> a >> b;
    if(a>b) b+=m;
    else{
     a+=m;
     b+=m;
    }
    v.push_back({a,b});
  }

  sort(all(v));
  
  vector<int> st(n,0);
  SegT T(2*n+5);
  ar.resize(n);
  vector<int> zip;
  for(int i=0;i<n;i++){
    zip.push_back(v[i][0]);
    zip.push_back(v[i][1]);
  }
  sort(all(zip));
  zip.erase(unique(all(zip)),zip.end());
  for(int i=0;i<n;i++){
  	if(v[i][0]<m && v[i][1]>=m) st[i]=1;
  	ar[i][0]=lower_bound(all(zip),v[i][0])-zip.begin();
  	ar[i][1]=lower_bound(all(zip),v[i][1])-zip.begin();
  }
  
  memset(lift,-1,sizeof(lift));

  for(int i=0;i<n;i++) T.update(1,0,2*n,ar[i][0],i);
  for(int i=0;i<n;i++){
  	lift[i][0]=T.query(1,0,2*n,ar[i][0]+1,ar[i][1]);
  	if(lift[i][0]!=-1 && ar[lift[i][0]][1]<=ar[i][1]) lift[i][0]=-1;
  	//cout << i << ' ' << lift[i][0] << '\n';
  }

  for(int i=1;i<LOG;i++)
  	for(int j=0;j<n;j++){
  	 if(lift[j][i-1]!=-1){
  	   lift[j][i]=lift[lift[j][i-1]][i-1];
  	 }
  	}

 int ans=(int)1e9;
  
 for(int i=0;i<n;i++){
   if(!st[i]) continue;
   int dur=m+v[i][0];
   //cout << i <<  ' ' << dur << '\n';
   int p=i,cur=1;
   for(int j=LOG-1;j>=0;j--){
    if(lift[p][j]==-1) continue;
    if(v[lift[p][j]][1]>=dur) continue;
    cur+=(1<<j);
    p=lift[p][j];
   }
   //cout << p << ' ' << cur << '\n';
   if(lift[p][0]!=-1 && v[lift[p][0]][1]>=dur) ans=min(ans,cur+1);
 }

 if(ans==(int)1e9) cout << -1 << '\n';
 else cout << ans << '\n';
}

int32_t main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tc=1;//cin >> tc;
  while(tc--) _();
  return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 15960 KB Output is correct
2 Correct 7 ms 15964 KB Output is correct
3 Correct 6 ms 15964 KB Output is correct
4 Correct 7 ms 15964 KB Output is correct
5 Correct 8 ms 15964 KB Output is correct
6 Correct 7 ms 15908 KB Output is correct
7 Correct 7 ms 15964 KB Output is correct
8 Correct 6 ms 15964 KB Output is correct
9 Correct 6 ms 15964 KB Output is correct
10 Correct 8 ms 15964 KB Output is correct
11 Correct 6 ms 15964 KB Output is correct
12 Correct 7 ms 16080 KB Output is correct
13 Correct 8 ms 15960 KB Output is correct
14 Correct 6 ms 15964 KB Output is correct
15 Correct 6 ms 15964 KB Output is correct
16 Correct 6 ms 15960 KB Output is correct
17 Correct 6 ms 15964 KB Output is correct
18 Correct 7 ms 15964 KB Output is correct
19 Correct 7 ms 15964 KB Output is correct
20 Correct 7 ms 15964 KB Output is correct
21 Correct 7 ms 15964 KB Output is correct
22 Correct 7 ms 15964 KB Output is correct
23 Correct 7 ms 15960 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 15960 KB Output is correct
2 Correct 7 ms 15964 KB Output is correct
3 Correct 6 ms 15964 KB Output is correct
4 Correct 7 ms 15964 KB Output is correct
5 Correct 8 ms 15964 KB Output is correct
6 Correct 7 ms 15908 KB Output is correct
7 Correct 7 ms 15964 KB Output is correct
8 Correct 6 ms 15964 KB Output is correct
9 Correct 6 ms 15964 KB Output is correct
10 Correct 8 ms 15964 KB Output is correct
11 Correct 6 ms 15964 KB Output is correct
12 Correct 7 ms 16080 KB Output is correct
13 Correct 8 ms 15960 KB Output is correct
14 Correct 6 ms 15964 KB Output is correct
15 Correct 6 ms 15964 KB Output is correct
16 Correct 6 ms 15960 KB Output is correct
17 Correct 6 ms 15964 KB Output is correct
18 Correct 7 ms 15964 KB Output is correct
19 Correct 7 ms 15964 KB Output is correct
20 Correct 7 ms 15964 KB Output is correct
21 Correct 7 ms 15964 KB Output is correct
22 Correct 7 ms 15964 KB Output is correct
23 Correct 7 ms 15960 KB Output is correct
24 Correct 7 ms 15960 KB Output is correct
25 Correct 8 ms 15964 KB Output is correct
26 Correct 6 ms 15964 KB Output is correct
27 Correct 7 ms 15964 KB Output is correct
28 Correct 7 ms 15964 KB Output is correct
29 Correct 7 ms 16112 KB Output is correct
30 Correct 7 ms 16044 KB Output is correct
31 Correct 8 ms 16064 KB Output is correct
32 Correct 7 ms 15964 KB Output is correct
33 Correct 6 ms 15964 KB Output is correct
34 Correct 7 ms 15964 KB Output is correct
35 Correct 7 ms 15964 KB Output is correct
36 Correct 6 ms 16032 KB Output is correct
37 Correct 7 ms 15964 KB Output is correct
38 Correct 7 ms 15964 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 15960 KB Output is correct
2 Correct 7 ms 15964 KB Output is correct
3 Correct 6 ms 15964 KB Output is correct
4 Correct 7 ms 15964 KB Output is correct
5 Correct 8 ms 15964 KB Output is correct
6 Correct 7 ms 15908 KB Output is correct
7 Correct 7 ms 15964 KB Output is correct
8 Correct 6 ms 15964 KB Output is correct
9 Correct 6 ms 15964 KB Output is correct
10 Correct 8 ms 15964 KB Output is correct
11 Correct 6 ms 15964 KB Output is correct
12 Correct 7 ms 16080 KB Output is correct
13 Correct 8 ms 15960 KB Output is correct
14 Correct 6 ms 15964 KB Output is correct
15 Correct 6 ms 15964 KB Output is correct
16 Correct 6 ms 15960 KB Output is correct
17 Correct 6 ms 15964 KB Output is correct
18 Correct 7 ms 15964 KB Output is correct
19 Correct 7 ms 15964 KB Output is correct
20 Correct 7 ms 15964 KB Output is correct
21 Correct 7 ms 15964 KB Output is correct
22 Correct 7 ms 15964 KB Output is correct
23 Correct 7 ms 15960 KB Output is correct
24 Correct 7 ms 15960 KB Output is correct
25 Correct 8 ms 15964 KB Output is correct
26 Correct 6 ms 15964 KB Output is correct
27 Correct 7 ms 15964 KB Output is correct
28 Correct 7 ms 15964 KB Output is correct
29 Correct 7 ms 16112 KB Output is correct
30 Correct 7 ms 16044 KB Output is correct
31 Correct 8 ms 16064 KB Output is correct
32 Correct 7 ms 15964 KB Output is correct
33 Correct 6 ms 15964 KB Output is correct
34 Correct 7 ms 15964 KB Output is correct
35 Correct 7 ms 15964 KB Output is correct
36 Correct 6 ms 16032 KB Output is correct
37 Correct 7 ms 15964 KB Output is correct
38 Correct 7 ms 15964 KB Output is correct
39 Correct 11 ms 16476 KB Output is correct
40 Correct 9 ms 16476 KB Output is correct
41 Correct 9 ms 16568 KB Output is correct
42 Correct 9 ms 16528 KB Output is correct
43 Correct 9 ms 16472 KB Output is correct
44 Correct 8 ms 16476 KB Output is correct
45 Correct 8 ms 16476 KB Output is correct
46 Correct 9 ms 16452 KB Output is correct
47 Correct 10 ms 16476 KB Output is correct
48 Correct 10 ms 16420 KB Output is correct
49 Correct 10 ms 16476 KB Output is correct
50 Correct 9 ms 16476 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 15960 KB Output is correct
2 Correct 7 ms 16084 KB Output is correct
3 Correct 7 ms 15964 KB Output is correct
4 Correct 7 ms 15964 KB Output is correct
5 Correct 7 ms 16016 KB Output is correct
6 Correct 7 ms 15960 KB Output is correct
7 Correct 7 ms 15964 KB Output is correct
8 Correct 9 ms 15964 KB Output is correct
9 Correct 6 ms 15964 KB Output is correct
10 Correct 6 ms 16216 KB Output is correct
11 Correct 7 ms 15960 KB Output is correct
12 Correct 6 ms 15964 KB Output is correct
13 Correct 7 ms 16120 KB Output is correct
14 Correct 7 ms 15964 KB Output is correct
15 Correct 10 ms 16472 KB Output is correct
16 Correct 8 ms 16476 KB Output is correct
17 Correct 10 ms 16488 KB Output is correct
18 Correct 10 ms 16476 KB Output is correct
19 Correct 10 ms 16476 KB Output is correct
20 Correct 87 ms 28760 KB Output is correct
21 Correct 154 ms 31644 KB Output is correct
22 Correct 153 ms 31800 KB Output is correct
23 Correct 120 ms 30860 KB Output is correct
24 Correct 140 ms 31804 KB Output is correct
25 Correct 169 ms 31312 KB Output is correct
26 Correct 124 ms 31712 KB Output is correct
27 Correct 120 ms 31808 KB Output is correct
28 Correct 132 ms 31668 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 15960 KB Output is correct
2 Correct 6 ms 15964 KB Output is correct
3 Correct 6 ms 16056 KB Output is correct
4 Correct 7 ms 15964 KB Output is correct
5 Correct 6 ms 15964 KB Output is correct
6 Correct 7 ms 15964 KB Output is correct
7 Correct 6 ms 15964 KB Output is correct
8 Correct 6 ms 15964 KB Output is correct
9 Correct 6 ms 15964 KB Output is correct
10 Correct 7 ms 15964 KB Output is correct
11 Correct 6 ms 15960 KB Output is correct
12 Correct 10 ms 16476 KB Output is correct
13 Correct 9 ms 16476 KB Output is correct
14 Correct 8 ms 16404 KB Output is correct
15 Correct 105 ms 28744 KB Output is correct
16 Correct 119 ms 30792 KB Output is correct
17 Correct 147 ms 31816 KB Output is correct
18 Correct 153 ms 31604 KB Output is correct
19 Correct 127 ms 31820 KB Output is correct
20 Correct 122 ms 30792 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 15960 KB Output is correct
2 Correct 7 ms 15964 KB Output is correct
3 Correct 6 ms 15964 KB Output is correct
4 Correct 7 ms 15964 KB Output is correct
5 Correct 8 ms 15964 KB Output is correct
6 Correct 7 ms 15908 KB Output is correct
7 Correct 7 ms 15964 KB Output is correct
8 Correct 6 ms 15964 KB Output is correct
9 Correct 6 ms 15964 KB Output is correct
10 Correct 8 ms 15964 KB Output is correct
11 Correct 6 ms 15964 KB Output is correct
12 Correct 7 ms 16080 KB Output is correct
13 Correct 8 ms 15960 KB Output is correct
14 Correct 6 ms 15964 KB Output is correct
15 Correct 6 ms 15964 KB Output is correct
16 Correct 6 ms 15960 KB Output is correct
17 Correct 6 ms 15964 KB Output is correct
18 Correct 7 ms 15964 KB Output is correct
19 Correct 7 ms 15964 KB Output is correct
20 Correct 7 ms 15964 KB Output is correct
21 Correct 7 ms 15964 KB Output is correct
22 Correct 7 ms 15964 KB Output is correct
23 Correct 7 ms 15960 KB Output is correct
24 Correct 7 ms 15960 KB Output is correct
25 Correct 8 ms 15964 KB Output is correct
26 Correct 6 ms 15964 KB Output is correct
27 Correct 7 ms 15964 KB Output is correct
28 Correct 7 ms 15964 KB Output is correct
29 Correct 7 ms 16112 KB Output is correct
30 Correct 7 ms 16044 KB Output is correct
31 Correct 8 ms 16064 KB Output is correct
32 Correct 7 ms 15964 KB Output is correct
33 Correct 6 ms 15964 KB Output is correct
34 Correct 7 ms 15964 KB Output is correct
35 Correct 7 ms 15964 KB Output is correct
36 Correct 6 ms 16032 KB Output is correct
37 Correct 7 ms 15964 KB Output is correct
38 Correct 7 ms 15964 KB Output is correct
39 Correct 11 ms 16476 KB Output is correct
40 Correct 9 ms 16476 KB Output is correct
41 Correct 9 ms 16568 KB Output is correct
42 Correct 9 ms 16528 KB Output is correct
43 Correct 9 ms 16472 KB Output is correct
44 Correct 8 ms 16476 KB Output is correct
45 Correct 8 ms 16476 KB Output is correct
46 Correct 9 ms 16452 KB Output is correct
47 Correct 10 ms 16476 KB Output is correct
48 Correct 10 ms 16420 KB Output is correct
49 Correct 10 ms 16476 KB Output is correct
50 Correct 9 ms 16476 KB Output is correct
51 Correct 7 ms 15960 KB Output is correct
52 Correct 7 ms 16084 KB Output is correct
53 Correct 7 ms 15964 KB Output is correct
54 Correct 7 ms 15964 KB Output is correct
55 Correct 7 ms 16016 KB Output is correct
56 Correct 7 ms 15960 KB Output is correct
57 Correct 7 ms 15964 KB Output is correct
58 Correct 9 ms 15964 KB Output is correct
59 Correct 6 ms 15964 KB Output is correct
60 Correct 6 ms 16216 KB Output is correct
61 Correct 7 ms 15960 KB Output is correct
62 Correct 6 ms 15964 KB Output is correct
63 Correct 7 ms 16120 KB Output is correct
64 Correct 7 ms 15964 KB Output is correct
65 Correct 10 ms 16472 KB Output is correct
66 Correct 8 ms 16476 KB Output is correct
67 Correct 10 ms 16488 KB Output is correct
68 Correct 10 ms 16476 KB Output is correct
69 Correct 10 ms 16476 KB Output is correct
70 Correct 87 ms 28760 KB Output is correct
71 Correct 154 ms 31644 KB Output is correct
72 Correct 153 ms 31800 KB Output is correct
73 Correct 120 ms 30860 KB Output is correct
74 Correct 140 ms 31804 KB Output is correct
75 Correct 169 ms 31312 KB Output is correct
76 Correct 124 ms 31712 KB Output is correct
77 Correct 120 ms 31808 KB Output is correct
78 Correct 132 ms 31668 KB Output is correct
79 Correct 7 ms 15960 KB Output is correct
80 Correct 6 ms 15964 KB Output is correct
81 Correct 6 ms 16056 KB Output is correct
82 Correct 7 ms 15964 KB Output is correct
83 Correct 6 ms 15964 KB Output is correct
84 Correct 7 ms 15964 KB Output is correct
85 Correct 6 ms 15964 KB Output is correct
86 Correct 6 ms 15964 KB Output is correct
87 Correct 6 ms 15964 KB Output is correct
88 Correct 7 ms 15964 KB Output is correct
89 Correct 6 ms 15960 KB Output is correct
90 Correct 10 ms 16476 KB Output is correct
91 Correct 9 ms 16476 KB Output is correct
92 Correct 8 ms 16404 KB Output is correct
93 Correct 105 ms 28744 KB Output is correct
94 Correct 119 ms 30792 KB Output is correct
95 Correct 147 ms 31816 KB Output is correct
96 Correct 153 ms 31604 KB Output is correct
97 Correct 127 ms 31820 KB Output is correct
98 Correct 122 ms 30792 KB Output is correct
99 Correct 165 ms 31820 KB Output is correct
100 Correct 159 ms 31816 KB Output is correct
101 Correct 125 ms 31732 KB Output is correct
102 Correct 146 ms 31820 KB Output is correct
103 Correct 129 ms 31812 KB Output is correct
104 Correct 132 ms 32064 KB Output is correct
105 Correct 128 ms 30532 KB Output is correct