oj.uz

Submission #660109

# Submission time Handle Problem Language Result Execution time Memory
660109 2022-11-20T11:15:03 Z Karuk Event Hopping (BOI22_events) C++14
100 / 100
 262 ms 34072 KB 
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
pair<int,int>max(pair<int,int>a,pair<int,int>b) {
    return a.first>b.first?a:b;
}
const int k=(1<<20);
pair<int,int>maxv[k*2+1];
void upd(int x,int va,int ind) {
    pair<int,int>val={va,ind};
    while(x>0) {
        maxv[x]=max(maxv[x],val);
        x>>=1;
    }
}
pair<int,int> ask(int &from,int &to,int cur=1,int beg=0,int en=k-1) {
    if(from<=beg && en<=to)return maxv[cur];
    if(to<beg || en<from)return {-1,-1};
    int mid=(beg+en)>>1;
    return max(ask(from,to,cur<<1,beg,mid),ask(from,to,(cur<<1)|1,mid+1,en));
}
int main() {
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int n,q;cin>>n>>q;
    pair<int,int>a[n];
    vector<int>v;
    for(int i=0;i<n;i++) {
        int x,y;
        cin>>x>>y;
        v.push_back(x);
        v.push_back(y);
        a[i]={x,y};
    }
    sort(v.begin(),v.end());
    map<int,int>m;
    for(int i=0;i<v.size();i++)m[v[i]]=i;
    for(int i=0;i<n;i++) {
        int x,y;
        a[i].first=m[a[i].first];
        a[i].second=m[a[i].second];
        x=a[i].first;
        y=a[i].second;
        upd(y+k,k-x,i);
    }
    pair<int,int> prev[n][20];
    for(int i=0;i<n;i++) {
        pair<int,int>d=ask(a[i].first,a[i].second);
        d.first=k-d.first;
        prev[i][0]=d;
    }
    for(int j=1;j<20;j++) {
        for(int i=0;i<n;i++) {
            prev[i][j]=prev[prev[i][j-1].second][j-1];
        }
    }
    for(int i=0;i<q;i++) {
        int x,y;cin>>x>>y;x--;y--;
        if(x==y)cout<<0<<endl;
        else if(a[x].second>=a[y].first && a[x].second<=a[y].second)cout<<1<<endl;
        else if(a[x].second>a[y].second){cout<<"impossible"<<endl;}
        else {
            int cnt=0;
            int cur=y;
            int en=a[x].second;
            for(int j=19;j>=0;j--) {
                if(prev[cur][j].first>en) {
                    cur=prev[cur][j].second;
                    cnt+=(1<<j);
                }
            }
            if(prev[cur][0].first>en)cout<<"impossible"<<endl;
            else cout<<cnt+2<<endl;
        }
    }
    return 0;
}
///9:30

Compilation message

events.cpp: In function 'int main()':
events.cpp:36:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for(int i=0;i<v.size();i++)m[v[i]]=i;
      |                 ~^~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 193 ms 25964 KB Output is correct
3 Correct 213 ms 25948 KB Output is correct
4 Correct 253 ms 25956 KB Output is correct
5 Correct 207 ms 26480 KB Output is correct
6 Correct 226 ms 26960 KB Output is correct
7 Correct 215 ms 27116 KB Output is correct
8 Correct 222 ms 31112 KB Output is correct
9 Correct 207 ms 31176 KB Output is correct
10 Correct 204 ms 26340 KB Output is correct
11 Correct 226 ms 28256 KB Output is correct
12 Correct 130 ms 26488 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 2 ms 596 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 1 ms 468 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 2 ms 596 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 2 ms 596 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 34 ms 2088 KB Output is correct
20 Correct 31 ms 2048 KB Output is correct
21 Correct 32 ms 2304 KB Output is correct
22 Correct 27 ms 2436 KB Output is correct
23 Correct 28 ms 2424 KB Output is correct
24 Correct 38 ms 2484 KB Output is correct
25 Correct 29 ms 2132 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 2 ms 596 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 162 ms 25360 KB Output is correct
20 Correct 158 ms 25392 KB Output is correct
21 Correct 172 ms 25424 KB Output is correct
22 Correct 186 ms 27104 KB Output is correct
23 Correct 211 ms 28528 KB Output is correct
24 Correct 221 ms 30044 KB Output is correct
25 Correct 80 ms 17676 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 181 ms 25992 KB Output is correct
2 Correct 223 ms 25940 KB Output is correct
3 Correct 228 ms 26092 KB Output is correct
4 Correct 226 ms 31176 KB Output is correct
5 Correct 209 ms 26344 KB Output is correct
6 Correct 243 ms 30784 KB Output is correct
7 Correct 247 ms 30924 KB Output is correct
8 Correct 262 ms 30956 KB Output is correct
9 Correct 205 ms 28500 KB Output is correct
10 Correct 232 ms 30440 KB Output is correct
11 Correct 243 ms 29904 KB Output is correct
12 Correct 240 ms 30408 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 193 ms 25964 KB Output is correct
3 Correct 213 ms 25948 KB Output is correct
4 Correct 253 ms 25956 KB Output is correct
5 Correct 207 ms 26480 KB Output is correct
6 Correct 226 ms 26960 KB Output is correct
7 Correct 215 ms 27116 KB Output is correct
8 Correct 222 ms 31112 KB Output is correct
9 Correct 207 ms 31176 KB Output is correct
10 Correct 204 ms 26340 KB Output is correct
11 Correct 226 ms 28256 KB Output is correct
12 Correct 130 ms 26488 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 2 ms 596 KB Output is correct
18 Correct 2 ms 596 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 2 ms 596 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 596 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 34 ms 2088 KB Output is correct
32 Correct 31 ms 2048 KB Output is correct
33 Correct 32 ms 2304 KB Output is correct
34 Correct 27 ms 2436 KB Output is correct
35 Correct 28 ms 2424 KB Output is correct
36 Correct 38 ms 2484 KB Output is correct
37 Correct 29 ms 2132 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 2 ms 596 KB Output is correct
41 Correct 1 ms 596 KB Output is correct
42 Correct 2 ms 596 KB Output is correct
43 Correct 1 ms 596 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 1 ms 596 KB Output is correct
46 Correct 1 ms 468 KB Output is correct
47 Correct 162 ms 25360 KB Output is correct
48 Correct 158 ms 25392 KB Output is correct
49 Correct 172 ms 25424 KB Output is correct
50 Correct 186 ms 27104 KB Output is correct
51 Correct 211 ms 28528 KB Output is correct
52 Correct 221 ms 30044 KB Output is correct
53 Correct 80 ms 17676 KB Output is correct
54 Correct 181 ms 25992 KB Output is correct
55 Correct 223 ms 25940 KB Output is correct
56 Correct 228 ms 26092 KB Output is correct
57 Correct 226 ms 31176 KB Output is correct
58 Correct 209 ms 26344 KB Output is correct
59 Correct 243 ms 30784 KB Output is correct
60 Correct 247 ms 30924 KB Output is correct
61 Correct 262 ms 30956 KB Output is correct
62 Correct 205 ms 28500 KB Output is correct
63 Correct 232 ms 30440 KB Output is correct
64 Correct 243 ms 29904 KB Output is correct
65 Correct 240 ms 30408 KB Output is correct
66 Correct 0 ms 340 KB Output is correct
67 Correct 184 ms 25932 KB Output is correct
68 Correct 193 ms 25976 KB Output is correct
69 Correct 239 ms 25960 KB Output is correct
70 Correct 207 ms 26512 KB Output is correct
71 Correct 216 ms 26944 KB Output is correct
72 Correct 203 ms 27080 KB Output is correct
73 Correct 227 ms 31136 KB Output is correct
74 Correct 223 ms 31196 KB Output is correct
75 Correct 219 ms 26372 KB Output is correct
76 Correct 206 ms 28272 KB Output is correct
77 Correct 126 ms 26432 KB Output is correct
78 Correct 0 ms 340 KB Output is correct
79 Correct 2 ms 604 KB Output is correct
80 Correct 1 ms 596 KB Output is correct
81 Correct 1 ms 596 KB Output is correct
82 Correct 1 ms 596 KB Output is correct
83 Correct 1 ms 596 KB Output is correct
84 Correct 1 ms 596 KB Output is correct
85 Correct 1 ms 468 KB Output is correct
86 Correct 30 ms 2168 KB Output is correct
87 Correct 30 ms 2024 KB Output is correct
88 Correct 31 ms 2388 KB Output is correct
89 Correct 27 ms 2388 KB Output is correct
90 Correct 28 ms 2488 KB Output is correct
91 Correct 26 ms 2388 KB Output is correct
92 Correct 29 ms 2124 KB Output is correct
93 Correct 165 ms 25328 KB Output is correct
94 Correct 166 ms 25336 KB Output is correct
95 Correct 168 ms 25396 KB Output is correct
96 Correct 179 ms 27136 KB Output is correct
97 Correct 210 ms 28528 KB Output is correct
98 Correct 211 ms 30080 KB Output is correct
99 Correct 75 ms 17744 KB Output is correct
100 Correct 256 ms 30848 KB Output is correct
101 Correct 258 ms 33912 KB Output is correct
102 Correct 238 ms 34072 KB Output is correct
103 Correct 232 ms 33480 KB Output is correct
104 Correct 236 ms 32912 KB Output is correct
105 Correct 246 ms 33544 KB Output is correct
106 Correct 192 ms 26952 KB Output is correct
107 Correct 234 ms 28568 KB Output is correct
108 Correct 196 ms 29356 KB Output is correct
109 Correct 196 ms 29140 KB Output is correct
110 Correct 253 ms 33868 KB Output is correct
111 Correct 251 ms 33752 KB Output is correct