Submission #595219

#	Time	Username	Problem	Language	Result	Execution time	Memory
595219		tamthegod	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	1496 ms	125024 KiB

sortbooks

#include<bits/stdc++.h>

#define int long long
#define pb push_back
#define fi first
#define se second
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e6 + 5;
const int mod = 1e9 + 7;
const ll oo = 1e18;
int n, m;
int a[maxN];
int st[4 * maxN];
void update(int id, int l, int r, int pos, int val)
{
    if(l > pos || r < pos) return;
    if(l == r && l == pos)
    {
        st[id] = max(st[id], val);
        return;
    }
    int mid = (l + r) / 2;
    update(id * 2, l, mid, pos, val);
    update(id * 2 + 1, mid + 1, r, pos, val);
    st[id] = max(st[id * 2], st[id * 2 + 1]);
}
int get(int id, int l, int r, int u, int v)
{
    if(l > v || r < u) return 0;
    if(l >= u && r <= v) return st[id];
    int mid = (l + r) / 2;
    return max(get(id * 2, l, mid, u, v), get(id * 2 + 1, mid + 1, r, u, v));
}
struct TQuery
{
    int l, k, id;
};
vector<TQuery> q[maxN];
void ReadInput()
{
    cin >> n >> m;
    for(int i=1; i<=n; i++) cin >> a[i];
    for(int i=1; i<=m; i++)
    {
        int l, r, k;
        cin >> l >> r >> k;
        q[r].pb({l, k, i});
    }
}
int res[maxN];
void Solve()
{
    stack<int> s;
    for(int i=1; i<=n; i++)
    {
        while(!s.empty() && a[s.top()] <= a[i]) s.pop();
        if(!s.empty()) update(1, 1, n, s.top(), a[s.top()] + a[i]);
        s.push(i);
        for(TQuery a : q[i])
        {
            res[a.id] = get(1, 1, n, a.l, i) <= a.k;
        }
    }
    for(int i=1; i<=m; i++) cout << res[i] << '\n';
}
int32_t main()
{
   // freopen("x.inp", "r", stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    ReadInput();
    Solve();
}

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