Submission #877359

#	Time	Username	Problem	Language	Result	Execution time	Memory
877359		TahirAliyev	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	2293 ms	95068 KiB

sortbooks

#include <bits/stdc++.h>
#define ll unsigned long long
#define pii pair<ll, int>
using namespace std;

const int MAX = (1 << 20);
int tree[MAX * 2];

int ask(int ql, int qr, int node = 1, int l = 1, int r = MAX){
    if(ql > r || qr < l) return 0;
    if(ql <= l && r <= qr) return tree[node];
    int mid = (l + r) / 2;
    return max(ask(ql, qr, node * 2, l, mid), ask(ql, qr, node * 2 + 1, mid + 1, r));
}

void update(int pos, int val, int node = 1, int l = 1, int r = MAX){
    if(l == r){
        tree[node] = val;
        return;
    }
    int mid = (l + r) / 2;
    if(pos <= mid){
        update(pos, val, node * 2, l, mid);
    }
    else{
        update(pos, val, node * 2 + 1, mid + 1, r);
    }
    tree[node] = max(tree[node * 2], tree[node * 2 + 1]);
}

int n, m;
vector<array<int, 3>> quer[MAX];    
bool ans[MAX];
int arr[MAX];

int main(){
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
    {
        cin >> arr[i];
    }
    for (int i = 0; i < m; i++)
    {
        int l, r, k; cin >> l >> r >> k;
        quer[r].push_back({l, k, i});
    }
    stack<pii> st;
    for (int i = 1; i <= n; i++)
    {
        while(!st.empty() && st.top().first <= arr[i]){
            st.pop();
        }
        if(st.size()){
            update(st.top().second, arr[st.top().second] + arr[i]);
        }
        st.push({arr[i], i});
        for(auto& q:quer[i]){
            ans[q[2]] = ask(q[0], i) <= q[1];
        }
    }
    
    for (int i = 0; i < m; i++)
    {
        cout << ans[i] << '\n';
    }
    
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:50:45: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare]
   50 |         while(!st.empty() && st.top().first <= arr[i]){
      |                              ~~~~~~~~~~~~~~~^~~~~~~~~

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