Submission #1040425

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040425		Neco_arc	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	604 ms	39888 KiB

sortbooks

#include <bits/stdc++.h>
#ifdef LOCAL
#include <bits/debug.hpp>
#endif // LOCAL

#define ll long long
#define all(x) x.begin(), x.end()
#define Neco "Hedgehog Daniyar and Algorithms"
#define resp(x) sort(all(x)), x.resize(unique(all(x)) - x.begin())
#define getbit(x,i) ((x >> i)&1)
#define _left id * 2, l, mid
#define _right id * 2 + 1, mid + 1, r
#define cntbit(x) __builtin_popcountll(x)
#define fi(i, a, b) for(int i = a; i <= b; i++)
#define fid(i, a, b) for(int i = a; i >= b; i--)
#define maxn (int) 1e6 + 7

using namespace std;

const ll mod = 1e9 + 7; //972663749
const ll base = 911382323;

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);
}

int n, q;
struct QUERY {
    int l, r, k, id;
    bool operator<(const QUERY &other) const {
        return r < other.r;
    }
} qr[maxn];
int a[maxn];

namespace TRAU {

    int calc(int l, int r) {
        int Max = -1e9, ans = 0;
        fi(i, l, r) {
            if(a[i] < Max) ans = max(ans, a[i] + Max);
            Max = max(Max, a[i]);
        }
        return ans;
    }

    void solve() {
        fi(i, 1, q) {
            int l = qr[i].l, r = qr[i].r, k = qr[i].k;
            cout << (calc(l, r) <= k) << '\n';
        }
    }
}

namespace Subtrask2 {

    int f[maxn], stk[maxn];
    int ans[maxn];

    struct IT {
        int st[4 * maxn];
        void update(int x, int val, int id = 1, int l = 0, int r = n) {
            if(l > x || r < x) return ;
            if(l == r) return st[id] = max(st[id], val), void();

            int mid = (l + r) >> 1;
            update(x, val, _left), update(x, val, _right);
            st[id] = max(st[id * 2], st[id * 2 + 1]);
        }

        int get(int u, int v, int id = 1, int l = 0, int r = n) {
            if(l > v || r < u) return 0;
            if(u <= l && r <= v) return st[id];

            int mid = (l + r) >> 1;
            return max(get(u, v, _left), get(u, v, _right));
        }

    } St;

    void prepare() {
        int top = 0;
        fi(i, 1, n) {
            while(top && a[i] >= a[stk[top]]) --top;
            f[i] = stk[top], stk[++top] = i;
        }
    }

    void solve() {
        prepare();
        sort(qr + 1, qr + 1 + q);

        int j = 1;
        fi(i, 1, q) {
            while(j <= qr[i].r) {
                St.update(f[j], a[f[j]] + a[j]);
                ++j;
            }
            ans[qr[i].id] = (St.get(qr[i].l, qr[i].r) <= qr[i].k);
        }

        fi(i, 1, q) cout << ans[i] << '\n';

    }

}

void solve()
{

    cin >> n >> q;
    fi(i, 1, n) cin >> a[i];
    fi(i, 1, q) cin >> qr[i].l >> qr[i].r >> qr[i].k, qr[i].id = i;

//    TRAU::solve(); cout << '\n';
    Subtrask2::solve();


}


int main()
{

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    if(fopen(Neco".inp", "r")) {
        freopen(Neco".inp", "r", stdin);
        freopen(Neco".out", "w", stdout);
    }


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


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


    return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:131:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  131 |         freopen(Neco".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:132:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  132 |         freopen(Neco".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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