Submission #1040324

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040324		Yang8on	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	77 / 100	2076 ms	262148 KiB

sortbooks

#include <bits/stdc++.h>
#define Y8o "Hedgehog Daniyar and Algorithms"
#define maxn (int) 1e6 + 5
#define ll long long
#define pii pair<ll, ll>
#define gb(i, j) ((i >> j) & 1)
#define all(x) x.begin(), x.end()
#define _left id * 2, l, mid
#define _right id * 2 + 1, mid + 1, r

//#define f first
//#define s second

using namespace std;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll GetRandom(ll l, ll r) {
    return uniform_int_distribution<ll> (l, r) (rng);
}
void iof() {
    if(fopen(Y8o".inp", "r"))
    {
        freopen(Y8o".inp", "r", stdin);
//        freopen(Y8o".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(NULL), cout.tie(NULL);
}
void ctime() {
    cerr << "\n" << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
}


int n, Q, a[maxn];

vector<int> cur[4 * maxn];
int st[4 * maxn];

int cb(int id, int id2) {
    int mx = cur[id].back();
    int pos = lower_bound(all(cur[id2]), mx) - cur[id2].begin();
    if(pos != 0) {
        pos --;
        return mx + cur[id2][pos];
    }
    return 0;
}

struct SEGMENTREE {
    void build(int id = 1, int l = 1, int r = n) {
        if(l == r) {
            st[id] = 0, cur[id].clear();
            cur[id].push_back(a[l]);
            return ;
        }
        int mid = (l + r) >> 1;
        build(_left), build(_right);

        st[id] = max({ st[id * 2], st[id * 2 + 1], cb(id * 2, id * 2 + 1) });
        cur[id].clear(), merge(all(cur[id * 2]), all(cur[id * 2 + 1]), back_inserter(cur[id]));
    }

    void get(int u, int v, vector<int>& res, int id = 1, int l = 1, int r = n) {
        if(v < l || r < u) return ;
        if(u <= l && r <= v) return res.push_back(id), void();
        int mid = (l + r) >> 1;
        get(u, v, res, _left), get(u, v, res, _right);
    }
} ST;

void solve()
{
    cin >> n >> Q;
    for(int i = 1; i <= n; i ++) cin >> a[i];
//    n = GetRandom(5, 5), Q=  GetRandom(10, 10);
//    cout << n << ' ' << Q << '\n';
//    for(int i = 1; i <= n; i ++) a[i] = GetRandom(0, 10), cout << a[i] << ' ';
//    cout << '\n';

    ST.build();

    for(int i = 1; i <= Q; i ++) {
        int l, r, k, ans = 0; cin >> l >> r >> k;
//        int ans = 0, l = GetRandom(1, n), r = GetRandom(1, n), k = GetRandom(0, 20);
//        if(l > r) swap(l, r);
//        cout << l << ' ' << r << ' ' << k << '\n';

        vector<int> res;
        ST.get(l, r, res);

        if(res.size()) {
            int pre = 0;
            for(int id : res) {
                ans = max(ans, st[id]);
                if(pre) ans = max(ans, cb(pre, id));
                if(pre == 0 || cur[pre].back() < cur[id].back()) pre = id;
            }
        }
        cout << (ans <= k) << '\n';
//        cout << "ANS :" << ' ' << (ans <= k) << ' ';

//        ans = 0;
//        for(int it1 = l; it1 <= r; it1 ++) {
//            for(int it2 = l; it2 < it1; it2 ++) {
//                if(a[it1] < a[it2]) ans = max(ans, a[it2] + a[it1]);
//            }
//        }
//        cout << (ans <= k) << '\n';
    }

}


int main()
{
    iof();

    int nTest = 1;
//    cin >> nTest;

    while(nTest --) {
        solve();
    }

    ctime();
    return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'void iof()':
sortbooks.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(Y8o".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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