Submission #979855

#	Time	Username	Problem	Language	Result	Execution time	Memory
979855		asdasdqwer	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	1701 ms	116772 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;

#define int int64_t
#define tii array<int,3>

struct Query {
    int l, r, k;
    int idx;

    bool operator<(const Query &q) {
        if (q.r != r) return r < q.r;
        return l < q.l;
    }
};

struct Segtree {
    int n;
    vector<int> seg, lz;

    Segtree(int sz) {
        n=1;
        while (n<sz)n*=2;
        seg.assign(2*n,-1);
        lz.assign(2*n,-1);
    }

    void pushdown(int x) {
        if (lz[x] == -1) return;
        if (seg[2*x+1] < lz[x]) {
            seg[2*x+1] = lz[2*x+1] = lz[x];
        }

        if (seg[2*x+2] < lz[x]) {
            seg[2*x+2] = lz[2*x+2] = lz[x];
        }

        lz[x] = -1;
    }

    void set(int l, int r, int v, int x, int lx, int rx) {
        if (lx >= r || rx <= l) return;
        if (lx >= l && rx <= r) {
            if (seg[x] >= v) return;
            seg[x] = lz[x] = v;
            return;
        }
        pushdown(x);
        int m=(lx+rx)/2;
        set(l, r, v, 2*x+1, lx, m);
        set(l, r, v, 2*x+2, m, rx);

        seg[x] = min(seg[2*x+1], seg[2*x+2]);
    }

    void set(int l, int r, int v) {
        set(l, r, v, 0, 0, n);
    }

    int get(int i, int x, int lx, int rx) {
        if (rx-lx==1) {
            return seg[x];
        }
        pushdown(x);
        int m=(lx+rx)/2;
        if (i<m)return get(i,2*x+1,lx,m);
        return get(i, 2*x+2, m, rx);
    }

    int get(int i) {
        return get(i, 0, 0, n);
    }
};

signed main() {
    int n,m;cin>>n>>m;
    vector<int> a(n);
    for (auto &x:a) cin>>x;

    vector<Query> q;
    vector<bool> ans(m, false);
    for (int i=0;i<m;i++) {
        Query qq;
        qq.idx = i;
        cin>>qq.l>>qq.r>>qq.k;
        qq.l--;qq.r--;
        if (qq.l == qq.r) {
            ans[i] = true;
            continue;
        }

        q.push_back(qq);
    }

    sort(q.begin(), q.end());
    int pt = 0;
    stack<tii> s;

    Segtree sg(n);

    vector<int> ans2(m);

    for (int i=0;i<n;i++) {
        while (s.size() && s.top()[2] <= a[i]) {
            s.pop();
        }

        int last;
        if (s.size()) {
            last = s.top()[1]+1;
            int first = s.top()[0];
            int score = s.top()[2] + a[i];
            sg.set(first, last, score);
        }

        else {
            last = 0;
        }

        s.push({last, i, a[i]});

        // for (int j=0;j<=i;j++) {
        //     cout<<sg.get(j)<<" ";
        // }
        // cout<<"\n";

        while (pt < (int)q.size() && q[pt].r == i) {
            int qt = q[pt].l;
            int val = sg.get(qt);
            ans[q[pt].idx] = (q[pt].k >= val);
            ans2[q[pt].idx] = val;
            pt++;
        }
    }

    for (int i=0;i<m;i++) {
        cout<<ans[i]<<"\n";
    }
}

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