Submission #1016709

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016709		dosts	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	64 / 100	358 ms	262144 KiB

sortbooks

//Dost SEFEROĞLU
#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define sp << " " << 
#define vi vector<int>
#define all(xx) xx.begin(),xx.end()
const int N = 1e6+1,inf = 2e9,B = 23,MOD = 998244353,LIM = 1e9;    

struct Node {
    vi v;
    int ans,mx;
};
int get_smaller(const vi& v, const int x) {
    auto it = lower_bound(v.begin(),v.end(),x);
    if (it == v.begin()) return -inf;
    return *(--it);
}

Node merge(const Node& n1,const Node& n2) {
    int n = n1.v.size(),m = n2.v.size();
    int ptr = 0,ptr2 = 0;
    Node ret;
    while (ptr < n && ptr2 < m) {
        if (n1.v[ptr] < n2.v[ptr2]) ret.v.push_back(n1.v[ptr++]);
        else ret.v.push_back(n2.v[ptr2++]);
    }
    while (ptr < n) ret.v.push_back(n1.v[ptr++]);
    while (ptr2 < m) ret.v.push_back(n2.v[ptr2++]);
    ret.mx = max(n1.mx,n2.mx);
    ret.ans = max({n1.ans,n2.ans,n1.mx+get_smaller(n2.v,n1.mx)});
    return ret;
}

vi vv;
vi a(N);
struct ST {
    vector<Node> t;
    void build(int node,int l,int r){
        if (l == r) {
            t[node] = {vi{a[l]},0,a[l]};
            return;
        }
        int m = (l+r) >> 1;
        build(2*node,l,m),build(2*node+1,m+1,r);
        t[node] = merge(t[2*node],t[2*node+1]);
    } 
    ST(int nn) {
        t.resize(4*nn+1);
        build(1,1,nn);
    }

    void get_nodes(int node,int l,int r,int L,int R) {
        if (l > R || r < L) return;
        if (l >= L && r <= R) {
            vv.push_back(node);
            return;
        }
        int m = (l+r) >> 1;
        get_nodes(2*node,l,m,L,R),get_nodes(2*node+1,m+1,r,L,R);
    }
};

void solve() {
    int n,m;
    cin >> n >> m;
    for (int i=1;i<=n;i++) cin >> a[i];
    ST st(n);
    while (m--) {
        int l,r,k;
        cin >> l >> r >> k;
        st.get_nodes(1,1,n,l,r);
        int ans = 0;
        for (auto it : vv) ans = max(ans,st.t[it].ans);
        int curmx = st.t[vv[0]].mx;
        for (int i=1;i<vv.size();i++) {
            ans = max(ans,curmx+get_smaller(st.t[vv[i]].v,curmx));
            curmx = max(curmx,st.t[vv[i]].mx);
        }
        if (ans <= k) cout << 1 << '\n';
        else cout << 0 << '\n';
        vv.clear();
    }
}  

                
                            
signed main() { 
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    #ifdef Dodi
        freopen("in.txt","r",stdin);
        freopen("out.txt","w",stdout);
    #endif
    int t = 1;
    //cin >> t; 
    while (t --> 0) solve();
}

Compilation message (stderr)

sortbooks.cpp: In function 'void solve()':
sortbooks.cpp:79:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |         for (int i=1;i<vv.size();i++) {
      |                      ~^~~~~~~~~~

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