Submission #947462

#	Time	Username	Problem	Language	Result	Execution time	Memory
947462		dilanyan	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	0 / 100	71 ms	4796 KiB

sortbooks

//-------------dilanyan------------\\ 
 
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<stdio.h>
using namespace std;
 
//------------------KarginDefines--------------------\\ 
 
#define ll long long
#define pb push_back
#define all(u) (u).begin(), (u).end()
#define pqueue priority_queue
#define upper upper_bound
#define lower lower_bound
#define umap unordered_map
#define uset unordered_set
#define Kargin ios_base::sync_with_stdio(false);cin.tie(NULL);
#define Usaco freopen(".in", "r", stdin); freopen(".out", "w", stdout);
 
 
//-------------------KarginConstants------------------\\ 
 
const ll mod = 1000000007;
const ll inf = 1e18;
 
//-------------------KarginCode------------------------\\ 
 
const int N = 1000005;
int w[N];

int n, m;

pair<int, int> tree[4 * N];

struct segtree {

    int size = 1;

    void init() {
        while (size < n) size <<= 1;
        build(0, 0, size);
    }

    void build(int x, int lx, int rx) {
        if (rx - lx == 1) {
            tree[x] = { -1,-1 };
            if (lx < n) tree[x] = { w[lx],lx };
            return;
        }
        int m = (lx + rx) / 2;
        build(2 * x + 1, lx, m);
        build(2 * x + 2, m, rx);
        if (tree[2 * x + 1].first >= tree[2 * x + 2].first) tree[x] = tree[2 * x + 1];
        else tree[x] = tree[2 * x + 2];
    }

    void set(int i, pair<int, int> v, int x, int lx, int rx) {
        if (rx - lx == 1) {
            tree[x] = v;
            return;
        }
        int m = (lx + rx) / 2;
        if (i < m) set(i, v, 2 * x + 1, lx, m);
        else set(i, v, 2 * x + 2, m, rx);
        if (tree[2 * x + 1].first >= tree[2 * x + 2].first) tree[x] = tree[2 * x + 1];
        else tree[x] = tree[2 * x + 2];
    }

    void set(int i, pair<int,int> v) {
        set(i, v, 0, 0, size);
    }

    pair<int, int> get(int l, int r, int x, int lx, int rx) {
        if (lx >= r || rx <= l) return { -1,-1 };
        if (lx >= l && rx <= r) return tree[x];
        int m = (lx + rx) / 2;
        pair<int, int> getl = get(l, r, 2 * x + 1, lx, m),
            getr = get(l, r, 2 * x + 2, m, rx);
        pair<int, int> get0;
        if (getl.first >= getr.first) get0 = getl;
        else get0 = getr;
        return get0;
    }

    pair<int, int> get(int l, int r) {
        return get(l, r, 0, 0, size);
    }
};

void KarginSolve() {
    cin >> n >> m;
    for (int i = 0;i < n;i++) cin >> w[i];
    if(n <= 5000 && m <= 5000) {
        segtree st;
        st.init();
        while (m--) {
            int l, r, k;
            cin >> l >> r >> k;
            l--;
            int ans = 1;
            for (int i = 0; i < r - l;i++) {
                pair<int, int> x = st.get(l, r);
                pair<int, int> y = st.get(x.second + 1, r);
                assert(x.first != -1);
                if (y.first != -1) {
                    if (x.first + y.first > k) {
                        ans = 0;
                        break;
                    }
                }
                st.set(x.second, { -1,-1 });
            }
            cout << ans << '\n';
            for (int i = l;i <= r;i++) st.set(i, { w[i],i });
        }
    }
}
 
int main() {
    //Usaco
    Kargin;
    int test = 1;
    //cin >> test;
    while (test--) {
        KarginSolve();
    }
    return 0;
}

Compilation message (stderr)

sortbooks.cpp:1:1: warning: multi-line comment [-Wcomment]
    1 | //-------------dilanyan------------\\
      | ^
sortbooks.cpp:8:1: warning: multi-line comment [-Wcomment]
    8 | //------------------KarginDefines--------------------\\
      | ^
sortbooks.cpp:22:1: warning: multi-line comment [-Wcomment]
   22 | //-------------------KarginConstants------------------\\
      | ^
sortbooks.cpp:27:1: warning: multi-line comment [-Wcomment]
   27 | //-------------------KarginCode------------------------\\
      | ^

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