Submission #1200289

#	Time	Username	Problem	Language	Result	Execution time	Memory
1200289		brover29	Osumnjičeni (COCI21_osumnjiceni)	C++17	110 / 110	234 ms	47544 KiB

Main

#include <bits/stdc++.h>
//qwerty47924692
using namespace std;
using ll = long long;
const ll N=2e5+29;
const string br="617283";
#define sz(a)(ll)a.size()
#define f first
#define s second
ll n,l[N],r[N],nxt[20][N];
set<pair<ll,ll>>s;
bool can_insert(ll i){
    auto it=s.lower_bound({l[i],0});
    if(it!=s.end()){
        ll j=it->s;
        if(l[i]<=l[j]&&l[j]<=r[i])return 0;
    }
    if(it!=s.begin()){
        --it;
        ll j=it->s;
        if(l[j]<=l[i]&&l[i]<=r[j])return 0;
    }
    return 1;
}
void calc(){
    ll j=0;
    for(ll i=1;i<=n;i++){
        if(j<i){
            s.clear();
            j=i;
            s.insert({l[i],i});
        }while(j+1<=n&&can_insert(j+1)){
            j++;
            s.insert({l[j],j});
        }
        nxt[0][i]=j+1;
        s.erase({l[i],i});
    }
    nxt[0][n+1]=n+1;
    for(ll i=n+1;i>=1;i--){
        for(ll j=1;j<=19;j++){
            nxt[j][i]=nxt[j-1][nxt[j-1][i]];
        }
    }
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin>>n;
    for(ll i=1;i<=n;i++){
        cin>>l[i]>>r[i];
    }
    calc();
//    for(ll i=1;i<=n;i++)cout<<nxt[i]<<' ';
//    cout<<'\n';
    ll q;
    cin>>q;
    while(q--){
        ll l,r;
        cin>>l>>r;
        ll ans=0;
        for(ll i=19;i>=0;i--){
            if(nxt[i][l]<=r){
                l=nxt[i][l];
                ans+=(1ll<<i);
            }
        }
        cout<<++ans<<'\n';
    }
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 50 / 50