Submission #1009187

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009187		Khanhcsp2	Curtains (NOI23_curtains)	C++14	100 / 100	928 ms	88148 KiB

curtains

#include<bits/stdc++.h>
#define el '\n'
#define fi first
#define sc second
#define int ll
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
using namespace std;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
const int mod=1e9+7;
const int N=5e5+11;
int n, m, q, l, r, nod[4*N], lazy[4*N], ans[N];
vector<int> rr[N];
vector<pii> qq[N];
void down(int id, int l, int r)
{
    lazy[id*2]=max(lazy[id*2], lazy[id]);
    lazy[id*2+1]=max(lazy[id*2+1], lazy[id]);

    nod[id*2]=max(nod[id*2], lazy[id*2]);
    nod[id*2+1]=max(nod[id*2+1], lazy[id*2+1]);
}
void update(int id, int l, int r, int u, int v, int val)
{
    if(r<u || v<l) return;
    if(u<=l && r<=v)
    {
        lazy[id]=max(lazy[id], val);
        nod[id]=max(nod[id], val);
        return;
    }
    down(id, l, r);
    int mid=(l+r)/2;
    update(id*2, l, mid, u, v, val);
    update(id*2+1, mid+1, r, u, v, val);
    nod[id]=min(nod[id*2], nod[id*2+1]);
}
int get(int id, int l, int r, int u, int v)
{
    if(r<u || v<l) return 1e9;
    if(u<=l && r<=v) return nod[id];
    down(id, l, r);
    int mid=(l+r)/2;
    return min(get(id*2, l, mid, u, v), get(id*2+1, mid+1, r, u, v));
}
void sol()
{
    cin >> n >> m >> q;
    for(int i=1;i<=m;i++)
    {
        cin >> l >> r;
        rr[r].push_back(l);
    }
    for(int i=1;i<=q;i++)
    {
        cin >> l >> r;
        qq[r].push_back({l, i});
    }
    for(int r=1;r<=n;r++)
    {
        for(int l:rr[r]) update(1, 1, n, l, r, l);
        for(auto [l, id]:qq[r])
        {
            if(get(1, 1, n, l, r)>=l) ans[id]=1;
        }
    }
    for(int i=1;i<=q;i++)
    {
        if(ans[i]) cout << "YES" << el;
        else cout << "NO" << el;
    }
}
signed main()
{
//    freopen("divisor.INP", "r", stdin);
//    freopen("divisor.OUT", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t=1;
    //cin >> t;
    while(t--)
    {
        sol();
    }
}

Compilation message (stderr)

curtains.cpp: In function 'void sol()':
curtains.cpp:64:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   64 |         for(auto [l, id]:qq[r])
      |                  ^

• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 15 / 15
• Subtask 4: 20 / 20
• Subtask 5: 36 / 36
• Subtask 6: 20 / 20