Submission #1113465

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113465		I_FloPPed21	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	0 / 100	1365 ms	140264 KiB

sortbooks

#include <iostream>
#include <vector>
#include <stack>
using namespace std;
int n,q;
const int N=1e6+5;
int v[N];
int sum[4*N],lazy[4*N],seg[4*N],adaug[4*N],best[4*N],right_bound[N];
struct hedgehog
{
    int i,r,k;
};
vector<hedgehog>query[N];
void find_bound()
{
    stack<int>st;
    for(int i=1;i<=n;i++)
    {
        while(!st.empty()&&v[st.top()]<v[i])
        {
            right_bound[st.top()]=i;
            st.pop();
        }
        st.push(i);
    }
    while(!st.empty())
    {
        right_bound[st.top()]=n+1;
        st.pop();
    }
}
void propaga(int nod)
{
    if(lazy[nod]==-1)
        return;

    adaug[nod*2]=lazy[nod];
    adaug[nod*2+1]=lazy[nod];
    lazy[nod*2]=lazy[nod];
    lazy[nod*2+1]=lazy[nod];
    best[nod*2]=(seg[nod*2]+lazy[nod]);
    best[nod*2+1]=(seg[nod*2+1]+lazy[nod]);
    lazy[nod]=-1;
}
void update(int nod,int st,int dr,int l,int r,int val)
{
    sum[nod]=seg[nod]+adaug[nod];
    if(l<=st&&dr<=r)
    {
        lazy[nod]=val;
        adaug[nod]=val;
        sum[nod]=seg[nod]+adaug[nod];
        best[nod]=sum[nod];
    }
    else
        if(l>dr||st>r)
        return;
    else
    {
        int mij=(st+dr)/2;
        propaga(nod);
        update(nod*2,st,mij,l,r,val);
        update(nod*2+1,mij+1,dr,l,r,val);
        best[nod]=max(best[nod*2],best[nod*2+1]);
    }
}
void build(int nod,int st,int dr)
{
    if(st==dr)
        {seg[nod]=v[st];
        best[nod]=seg[nod];}
    else
    {
        int mij=(st+dr)/2;
        build(nod*2,st,mij);
        build(nod*2+1,mij+1,dr);
        seg[nod]=max(seg[nod*2],seg[nod*2+1]);
        best[nod]=max(best[nod*2],best[nod*2+1]);
    }
}
int answer(int nod,int st,int dr,int l,int r)
{
    if(l<=st&&dr<=r)
    {
        return best[nod];
    }
    else
        if(l>dr||st>r)
        return -1;
    else
    {
        propaga(nod);
        int mij=(st+dr)/2;
        return max(answer(nod*2,st,mij,l,r),answer(nod*2+1,mij+1,dr,l,r));
    }
}
void citeste()
{
    cin>>n>>q;
    for(int i=1;i<=n;i++)
        cin>>v[i];
    for(int i=1;i<=q;i++)
    {
        int l,r,k;
        cin>>l>>r>>k;
        query[l].push_back({i,r,k});
    }
}
int afis[N];
void rezolva()
{
    for(int i=n;i>=1;i--)
    {
        int dr=right_bound[i]-1;
        update(1,1,n,i+1,dr,v[i]);
        for (auto [x,y,z]:query[i])
        {
            afis[x]=(answer(1,1,n,i,y)<=z);

        }
    }
    for(int i=1;i<=q;i++)
        cout<<afis[i]<<'\n';
}

int main()
{

    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    citeste();
    build(1,1,n);
    find_bound();
    rezolva();
    return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'void rezolva()':
sortbooks.cpp:116:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  116 |         for (auto [x,y,z]:query[i])
      |                   ^

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23