oj.uz

Submission #805533

# Submission time Handle Problem Language Result Execution time Memory
805533 2023-08-03T17:36:09 Z winter0101 Event Hopping (BOI22_events) C++14
100 / 100
 223 ms 24756 KB 
#include<bits/stdc++.h>
using namespace std;
#define all(fl) fl.begin(),fl.end()
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define lb lower_bound
#define ub upper_bound
#define sz(a) (int)a.size()
#define pii pair<int,int>
#define pli pair<long long,int>
#define gcd __gcd
#define lcm(x,y) x*y/__gcd(x,y)
const int maxn=1e5+9;
pii a[maxn];
int st[maxn][19];
int n,q;
pii st1[maxn*8];
pii combine(const pii &p1, const pii &q1){
if (p1.fi>q1.fi)return q1;
return p1;
}
void build(int id,int l,int r){
st1[id]={maxn*2,0};
if (l==r)return;
int mid=(l+r)/2;
build(id*2,l,mid);
build(id*2+1,mid+1,r);
}
void update(int id,int l,int r,int u,pii val){
if (l>u||r<u)return;
if (l==r){
    st1[id]=combine(st1[id],val);
    return;
}
int mid=(l+r)/2;
update(id*2,l,mid,u,val);
update(id*2+1,mid+1,r,u,val);
st1[id]=combine(st1[id*2],st1[id*2+1]);
}
pii get(int id,int l,int r,int u,int v){
if (l>v||r<u||u>v)return {maxn*2,0};
if (u<=l&&r<=v)return st1[id];
int mid=(l+r)/2;
return combine(get(id*2,l,mid,u,v),get(id*2+1,mid+1,r,u,v));
}
void build(){
int m=n*2;
build(1,1,m);
for1(i,1,n){
update(1,1,m,a[i].se,{a[i].fi,i});
}
for1(i,1,n){
pii tmp=get(1,1,m,a[i].fi,a[i].se);
//if (i==64571)cout<<tmp.fi<<" "<<a[i].fi<<'\n';
if (tmp.fi>=a[i].fi)continue;
st[i][0]=tmp.se;
}
for1(j,1,18){
for1(i,1,n){
st[i][j]=st[st[i][j-1]][j-1];
}
}
}
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("events.INP","r",stdin);
    //freopen("events.OUT","w",stdout);
    cin>>n>>q;
    vector<int>nen;
    nen.pb(0);
    for1(i,1,n){
    cin>>a[i].fi>>a[i].se;
    nen.pb(a[i].fi);
    nen.pb(a[i].se);
    }
    sort(all(nen));
    map<int,int>n1;
    for1(i,1,sz(nen)-1){
    if (nen[i]==nen[i-1])continue;
    n1[nen[i]]=n1[nen[i-1]]+1;
    }
    for1(i,1,n){
    a[i].fi=n1[a[i].fi];
    a[i].se=n1[a[i].se];
    //cout<<"type "<<" "<<a[i].fi<<" "<<a[i].se<<'\n';
    }
    build();
    for1(i,1,q){
    int s,e;
    cin>>s>>e;
    //if (i!=13)continue;
    if (a[s].se>a[e].se){
        cout<<"impossible"<<'\n';
    }
    else if (s==e){
        cout<<0<<'\n';
    }
    else if (a[e].fi<=a[s].se&&a[s].se<=a[e].se){
        cout<<1<<'\n';
    }
    else {
        int ans=0;
        for2(j,18,0){
        if (!st[e][j])continue;
        int id=st[e][j];
        if (a[id].fi>a[s].se){
            //cerr<<j<<'\n';
            e=id;
            ans+=(1<<j);
        }
        }
        //cerr<<st[e][0]<<'\n';
        //cout<<e<<'\n';
        //cout<<a[s].fi<<" "<<a[s].se<<'\n';
        //cout<<get(1,1,2*n,a[e].fi,a[e].se).fi<<" "<<a[e].fi<<'\n';
        if (st[e][0]==0)ans=-1;
        else {
            int id=st[e][0];
            if (a[id].fi<=a[s].se){
                ans+=2;
            }
            else ans=-1;
        }
        if (ans==-1)cout<<"impossible"<<'\n';
        else cout<<ans<<'\n';
    }
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 148 ms 19136 KB Output is correct
3 Correct 151 ms 19212 KB Output is correct
4 Correct 188 ms 19108 KB Output is correct
5 Correct 158 ms 19720 KB Output is correct
6 Correct 157 ms 19916 KB Output is correct
7 Correct 167 ms 20080 KB Output is correct
8 Correct 184 ms 24056 KB Output is correct
9 Correct 186 ms 24092 KB Output is correct
10 Correct 168 ms 19300 KB Output is correct
11 Correct 180 ms 21184 KB Output is correct
12 Correct 103 ms 19440 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 472 KB Output is correct
6 Correct 1 ms 484 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 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 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 472 KB Output is correct
6 Correct 1 ms 484 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 2 ms 644 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 34 ms 2308 KB Output is correct
20 Correct 33 ms 2272 KB Output is correct
21 Correct 41 ms 2528 KB Output is correct
22 Correct 28 ms 2612 KB Output is correct
23 Correct 24 ms 2680 KB Output is correct
24 Correct 32 ms 2640 KB Output is correct
25 Correct 27 ms 2268 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 472 KB Output is correct
6 Correct 1 ms 484 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 124 ms 18600 KB Output is correct
20 Correct 125 ms 18552 KB Output is correct
21 Correct 146 ms 18636 KB Output is correct
22 Correct 150 ms 20356 KB Output is correct
23 Correct 223 ms 23716 KB Output is correct
24 Correct 175 ms 23608 KB Output is correct
25 Correct 50 ms 14408 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 145 ms 19060 KB Output is correct
2 Correct 153 ms 19220 KB Output is correct
3 Correct 163 ms 19124 KB Output is correct
4 Correct 185 ms 24352 KB Output is correct
5 Correct 155 ms 19592 KB Output is correct
6 Correct 199 ms 24000 KB Output is correct
7 Correct 217 ms 23812 KB Output is correct
8 Correct 196 ms 23948 KB Output is correct
9 Correct 183 ms 23076 KB Output is correct
10 Correct 202 ms 23480 KB Output is correct
11 Correct 210 ms 23200 KB Output is correct
12 Correct 195 ms 23412 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 148 ms 19136 KB Output is correct
3 Correct 151 ms 19212 KB Output is correct
4 Correct 188 ms 19108 KB Output is correct
5 Correct 158 ms 19720 KB Output is correct
6 Correct 157 ms 19916 KB Output is correct
7 Correct 167 ms 20080 KB Output is correct
8 Correct 184 ms 24056 KB Output is correct
9 Correct 186 ms 24092 KB Output is correct
10 Correct 168 ms 19300 KB Output is correct
11 Correct 180 ms 21184 KB Output is correct
12 Correct 103 ms 19440 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 472 KB Output is correct
18 Correct 1 ms 484 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 2 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 2 ms 644 KB Output is correct
27 Correct 2 ms 468 KB Output is correct
28 Correct 2 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 34 ms 2308 KB Output is correct
32 Correct 33 ms 2272 KB Output is correct
33 Correct 41 ms 2528 KB Output is correct
34 Correct 28 ms 2612 KB Output is correct
35 Correct 24 ms 2680 KB Output is correct
36 Correct 32 ms 2640 KB Output is correct
37 Correct 27 ms 2268 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 1 ms 468 KB Output is correct
41 Correct 2 ms 468 KB Output is correct
42 Correct 2 ms 468 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 2 ms 468 KB Output is correct
45 Correct 2 ms 468 KB Output is correct
46 Correct 1 ms 468 KB Output is correct
47 Correct 124 ms 18600 KB Output is correct
48 Correct 125 ms 18552 KB Output is correct
49 Correct 146 ms 18636 KB Output is correct
50 Correct 150 ms 20356 KB Output is correct
51 Correct 223 ms 23716 KB Output is correct
52 Correct 175 ms 23608 KB Output is correct
53 Correct 50 ms 14408 KB Output is correct
54 Correct 145 ms 19060 KB Output is correct
55 Correct 153 ms 19220 KB Output is correct
56 Correct 163 ms 19124 KB Output is correct
57 Correct 185 ms 24352 KB Output is correct
58 Correct 155 ms 19592 KB Output is correct
59 Correct 199 ms 24000 KB Output is correct
60 Correct 217 ms 23812 KB Output is correct
61 Correct 196 ms 23948 KB Output is correct
62 Correct 183 ms 23076 KB Output is correct
63 Correct 202 ms 23480 KB Output is correct
64 Correct 210 ms 23200 KB Output is correct
65 Correct 195 ms 23412 KB Output is correct
66 Correct 1 ms 332 KB Output is correct
67 Correct 141 ms 19560 KB Output is correct
68 Correct 168 ms 19524 KB Output is correct
69 Correct 162 ms 19592 KB Output is correct
70 Correct 165 ms 20092 KB Output is correct
71 Correct 157 ms 20548 KB Output is correct
72 Correct 180 ms 20732 KB Output is correct
73 Correct 173 ms 24744 KB Output is correct
74 Correct 186 ms 24756 KB Output is correct
75 Correct 172 ms 19912 KB Output is correct
76 Correct 178 ms 21956 KB Output is correct
77 Correct 127 ms 20036 KB Output is correct
78 Correct 1 ms 340 KB Output is correct
79 Correct 1 ms 468 KB Output is correct
80 Correct 2 ms 504 KB Output is correct
81 Correct 2 ms 468 KB Output is correct
82 Correct 1 ms 476 KB Output is correct
83 Correct 2 ms 468 KB Output is correct
84 Correct 1 ms 468 KB Output is correct
85 Correct 1 ms 468 KB Output is correct
86 Correct 29 ms 2760 KB Output is correct
87 Correct 32 ms 2648 KB Output is correct
88 Correct 30 ms 2932 KB Output is correct
89 Correct 26 ms 2904 KB Output is correct
90 Correct 24 ms 2992 KB Output is correct
91 Correct 33 ms 3044 KB Output is correct
92 Correct 30 ms 2648 KB Output is correct
93 Correct 125 ms 18900 KB Output is correct
94 Correct 122 ms 18892 KB Output is correct
95 Correct 150 ms 18828 KB Output is correct
96 Correct 150 ms 20232 KB Output is correct
97 Correct 188 ms 23188 KB Output is correct
98 Correct 217 ms 23144 KB Output is correct
99 Correct 46 ms 13944 KB Output is correct
100 Correct 218 ms 23800 KB Output is correct
101 Correct 214 ms 23720 KB Output is correct
102 Correct 197 ms 23916 KB Output is correct
103 Correct 199 ms 23448 KB Output is correct
104 Correct 222 ms 23196 KB Output is correct
105 Correct 218 ms 23468 KB Output is correct
106 Correct 156 ms 17908 KB Output is correct
107 Correct 190 ms 19104 KB Output is correct
108 Correct 159 ms 19180 KB Output is correct
109 Correct 173 ms 19180 KB Output is correct
110 Correct 220 ms 23664 KB Output is correct
111 Correct 222 ms 23712 KB Output is correct