Submission #438713

#	Time	Username	Problem	Language	Result	Execution time	Memory
438713		leaked	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	1394 ms	130524 KiB

sortbooks

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#define f first
#define s second
#define endl '\n'
#define vec vector
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define m_p make_pair
#define sz(x) (int)x.size()
#define pw(x) (1LL<<x)

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef pair<ll,int> pli;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

auto rng=bind(uniform_int_distribution<int>(0,1e9),mt19937(time(0)));

template<class T>bool umin(T &a,const T &b) {return (a>b?a=b,1:0);}
template<class T>bool umax(T &a,const T &b) {return (a<b?a=b,1:0);}

template<class T> using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
const int N=1e6+1;
struct fenwick{
    int t[N];
    void init(){
        fill(t,t+N,-2e9);
    }
    void upd(int id,int x){
        id=N-id-1;
        while(id<N){
            umax(t[id],x);
            id+=id&-id;
        }
    }
    int get(int id){
        int ans=-2e9;
        id=N-id-1;
        while(id>0){
            umax(ans,t[id]);
            id-=id&-id;
        }
        return ans;
    }
}T;
int lft[N],rgt[N];
signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//    ifstream cin("input.txt");
//    ifstream fin("o.txt");
    int n,q;
    cin>>n>>q;
    vec<int>a(n);
    T.init();
    for(auto &z : a) cin>>z;
    vec<pii>vc;vc.pb({2e9,-1});
    for(int i=0;i<n;i++){
        while(sz(vc) && a[i]>=vc.back().f) vc.pop_back();
        lft[i]=vc.back().s;
        vc.pb({a[i],i});
    }
    vc.clear();
    vec<vec<int>>qry(n,vec<int>());
    vec<int>l(q),r(q),k(q),answ(q);
    for(int i=0;i<q;i++){
        cin>>l[i]>>r[i]>>k[i];--l[i];--r[i];
        qry[r[i]].pb(i);
    }
    vec<vec<int>>del(n+1,vec<int>());
    for(int i=0;i<n;i++){
        del[rgt[i]].pb(i);
        if(lft[i]!=-1){
            T.upd(lft[i],a[lft[i]]+a[i]);
        }
        /// also i need to update C
        for(auto &z : qry[i]){
            answ[z]=T.get(l[z]);
//            cerr<<T.get(l[z])<<endl;
        }
    }
    for(int i=0;i<q;i++){
        cout<<(answ[i]<=k[i])<<endl;
    }
    return  0;
}
/*

*/

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 23 / 23