Submission #1285129

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285129		dobri_oke	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++20	0 / 100	3100 ms	257568 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define pb push_back
//#define int long long

const int N = 1e6+100;
int n, q, a[N], t[N * 4], t2[N * 4];
vector < int > g[N * 4];
map < int, int > mp[N];
void build(int v, int l, int r){
    if(l == r){
        t[v] = a[l];
        g[v].pb(a[l]);
        return;
    }
    int m = (l + r) / 2;
    build(v + v, l, m);
    build(v + v + 1, m + 1, r);
    g[v].resize(g[v + v].size() + g[v + v + 1].size());
    merge(g[v + v].begin(), g[v + v].end(), g[v + v + 1].begin(), g[v + v + 1].end(), g[v].begin());
    //cout << l << ' ' << r << '\n';
    //for(auto to : g[v]) cout << to << ' ';
    //cout << '\n';
    t2[v] = max(t2[v + v], t2[v + v + 1]);
    t[v] = g[v].back();
    for(int i = g[v + v + 1].size() - 1; i >= 0; i--){
        if(t[v + v] > g[v + v + 1][i]){
            t2[v] = max(t2[v], t[v + v] + g[v + v + 1][i]);
            return;
        }
    }
}
vector < int > h;
void get(int v, int l, int r, int ll, int rr){
    if(ll <= l && r <= rr){
        h.pb(v);
        return;
    } 
    if(l > rr || ll > r) return;
    int m = (l + r) / 2;
    get(v + v, l, m, ll, rr);
    get(v + v + 1, m + 1, r, ll, rr);
}
void solve(){
    cin >> n >> q;
    for(int i = 1; i <= n; i++) cin >> a[i];
    build(1, 1, n);
    while(q--){
        int l, r, k;
        cin >> l >> r >> k;
        if(mp[l][r] != 0){
            if(mp[l][r] - 1 <= k) cout << 1 << '\n';
            else cout << 0 << '\n';
            return;
        }
        if(l == r){
            cout << 1 << '\n';
            continue;
        }
        get(1, 1, n, l, r);
        int ans=0, mx = t[h[0]];
        for(auto to : h) ans = max(ans, t2[to]);
        for(int i = 1; i < h.size(); i++){
            for(int j = i; j < h.size(); j++){
                int ll = 0, rr = g[h[j]].size() - 1, cnt = -mx;
                while(ll <= rr){
                    int m = (ll + rr) / 2;
                    if(mx > g[h[j]][m]){
                        cnt = g[h[j]][m];
                        ll = m + 1;
                    }
                    else rr = m - 1;
                }
                ans = max(ans, mx + cnt);
            }
            mx = max(mx, t[h[i]]);
        }
        mp[l][r] = ans + 1;
        if(ans <= k) cout << 1 << '\n';
        else cout << 0 << '\n';
        h.clear();
    }
}

signed main(){   
    ios_base::sync_with_stdio(0);   cin.tie(0);
    //freopen("promote.in","r",stdin);
    //freopen("promote.out","w",stdout);
    int tt=1;
   // cin >> tt;
    while(tt--){
        solve();
    }
}

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