Submission #798883

#	Time	Username	Problem	Language	Result	Execution time	Memory
798883		Alkarat	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	1421 ms	63588 KiB

sortbooks

#include <bits/stdc++.h>
#define ll long long
#define f first
#define s second
const int N=1e6+10;
using namespace std;
int n,m,a[N],res[N];
struct query
{
    int id,l,r,lim;
    bool operator<(const query &x)const
    {
        return l>x.l;
    }
};
int bit[N];
void update(int id,int val)
{
    while(id<=n)
    {
        bit[id]=max(bit[id],val);
        id+=id&-id;
    }
}
int get(int id)
{
    int kq=0;
    while(id>0)
    {
        kq=max(kq,bit[id]);
        id-=id&-id;
    }
    return kq;
}
vector<query>q;
stack<int>st;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>m;
    q.resize(m);
    for(int i=1; i<=n; i++) cin>>a[i];
    for(int i=0; i<=m-1; i++)
    {
        cin>>q[i].l>>q[i].r>>q[i].lim;
        q[i].id=i;
    }
    sort(q.begin(),q.end());
    int now=n+1;
    for(auto [id,l,r,lim]:q)
    {
        while(now>l)
        {
            now--;
            while(st.size()&&a[st.top()]<a[now])
            {
                int x=st.top();
                update(x,a[now]+a[x]);
                st.pop();
            }
            while(st.size()&&a[st.top()]==a[now]) st.pop();
            st.push(now);
        }
        res[id]=(get(r)<=lim);
    }
    for(int i=0; i<=m-1; i++) cout<<res[i]<<endl;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:52:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   52 |     for(auto [id,l,r,lim]:q)
      |              ^

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