Submission #471676

#	Time	Username	Problem	Language	Result	Execution time	Memory
471676		jeroenodb	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	64 / 100	3077 ms	77508 KiB

sortbooks

#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 1e5+1, oo = 1e9;
struct segtree {
    struct node {
        int mx=0, lazy=0;
        node() {}
        node(int val) {
            mx=val;
        }
    };
    vector<node> seg;
    int n,ptwo;
    segtree(int nn) {
        n=nn,ptwo=1;
        while(ptwo<n) ptwo*=2;
        seg.resize(2*ptwo);
    }
    void updateNode(int i, int val) {
        auto& v = seg[i];
        v.mx+=val,v.lazy+=val;
    }

    void pull(int i) {
        auto& v = seg[i];
        v.mx = max(seg[i*2].mx,seg[i*2+1].mx);
    }
    void add(int i, int l, int r, int ql, int qr, int val) {
        if(qr<l or r<ql) return;
        if(ql<=l and r<=qr) {
            updateNode(i,val);
            return;
        }
        int mid = (l+r)/2;
        push(i);
        add(i*2,l,mid,ql,qr,val),add(i*2+1,mid+1,r,ql,qr,val);
        pull(i);
    }
    void push(int i) {
        updateNode(i*2,seg[i].lazy);
        updateNode(i*2+1,seg[i].lazy);
        seg[i].lazy=0;
    }
    ll get(int i, int l, int r, int ql, int qr) {
        if(qr<l or r<ql) return 0;
        if(ql<=l and r<=qr) {
            return seg[i].mx;
        }
        int mid = (l+r)/2;
        push(i);
        auto sum = max(get(i*2,l,mid,ql,qr),get(i*2+1,mid+1,r,ql,qr));
        pull(i);
        return sum;
    }

    node& operator[](int i) {return seg[i+ptwo];}
    void build() {
        for(int i=ptwo-1;i>=1;--i) {
            pull(i);
        }
    }
};
int main() {
    int n,m; cin >> n >> m;
    struct query {
        int l,k,id;
    };
    vector<vector<query>> queries(n);
    vi w(n); for(auto& i : w) cin >> i;
    segtree seg(n);
    for(int i=0;i<m;++i) {
        int l,r,k; cin >> l >> r >> k,--l,--r;
        queries[r].push_back({l,k,i});
    }
    vi prv(n,-1), from(n,0),ans(m,-1);
    int active=-1;
    for(int i=0;i<n;++i) {
        prv[i]=i-1;
        while(prv[i]!=-1 and w[prv[i]]<=w[i]) prv[i] = prv[prv[i]];
        while(active<prv[i]) {
            ++active;
            seg.add(1,0,seg.ptwo-1,active,active,w[active]);
        }
        if(prv[i]!=-1) {
            int& before = from[prv[i]];
            if(w[i]>before) {
                seg.add(1,0,seg.ptwo-1,prv[i], prv[i], w[i]-before);
                before=w[i];
            }
        }
        for(auto& q : queries[i]) {
            ans[q.id]=seg.get(1,0,seg.ptwo-1,q.l, i)<=q.k;
        }
    }
    for(auto i : ans) {
        cout << i << '\n';
    }
}

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