Submission #345197

#	Time	Username	Problem	Language	Result	Execution time	Memory
345197		Rakhmand	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	0 / 100	2080 ms	71224 KiB

sortbooks

//
//  A.cpp
//  torelax
//
//  Created by Rakhman on 1/5/21.
//
 
#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <iterator>
 
#define ios ios_base::sync_with_stdio(0), cout.tie(0), cin.tie(0);
#define S second
#define F first
#define pb push_back
#define nl '\n'
#define NL cout << '\n';
#define EX exit(0)
#define all(s) s.begin(), s.end()
#define no_answer {cout << "NO"; exit(0);}
#define FOR(i, start, finish, k) for(llong i = start; i <= finish; i += k)
 
const long long mxn = 1e6 + 110;
const long long mnn = 1e3 + 2;
const long long mod = 1e9 + 7;
const long long inf = 1e18;
const long long OO = 1e9 + 100;
 
typedef long long llong;
typedef unsigned long long ullong;
 
using namespace std;
 
int n, m, b[mxn], pr[mxn], su[mxn], ans[mxn], pos[mxn];
int Q;
vector<int> rightq[mxn];

struct query{
    int l, r, x;
}q[mxn];

void divideandconquer(int l, int r){
    if(l == r) return ;
    int m = (l + r) / 2;
    for(int i = m + 1; i <= r; i++){
        pr[i] = b[i];
        if(i > m + 1){
            ans[i] = ans[i - 1];
            pr[i] = max(pr[i - 1], pr[i]);
            if(pr[i - 1] > b[i]){
                ans[i] = max(ans[i], pr[i - 1] + b[i]);
            }
        }
    }
    vector<int> v;
    for(int i = m; i >= l; i--) {
        su[i] = b[i];
        if(i < m) {
            ans[i] = ans[i + 1];
            su[i] = max(su[i + 1], su[i]);
        }
        while(v.size() > 0 && v.back() <= b[i]){
            if(b[i] > v.back()) ans[i] = max(ans[i], b[i] + v.back());
            v.pop_back();
        }
        v.push_back(b[i]);
    }
    vector<int> kek;
    for(int i = m + 1; i <= r; i++){
        if(kek.size() == 0 || kek.back() < b[i]){
            kek.push_back(b[i]);
        }
        for(int j = 0; j < rightq[i].size(); j++){
            int left = q[rightq[i][j]].l, k = q[rightq[i][j]].x;
            if(pos[rightq[i][j]] == 0) continue;
            if(left <= m){
                if(max(ans[r], ans[l]) > k) pos[rightq[i][j]] = 0;
                else{
                    int mx = su[l];
                    int x = lower_bound(kek.begin(), kek.end(), mx) - kek.begin() - 1;
                    if(0 <= x && x < kek.size()) {
                        if(mx + kek[x] > k){
                            pos[rightq[i][j]] = 0;
                            continue;
                        }
                    }
                }
            }else{
                continue;
            }
        }
    }
}

int main() {
    cin >> n >> Q;
    for(int i = 1; i <= n; i++){
        cin >> b[i];
    }
    for(int i = 1; i <= Q; i++){
        cin >> q[i].l >> q[i].r >> q[i].x;
        rightq[q[i].r].push_back(i);
        pos[i] = 1;
    }
    divideandconquer(1, n);
    for(int i = 1; i <= Q; i++){
        cout << pos[i] << nl;
    }
}

Compilation message (stderr)

sortbooks.cpp: In function 'void divideandconquer(int, int)':
sortbooks.cpp:92:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |         for(int j = 0; j < rightq[i].size(); j++){
      |                        ~~^~~~~~~~~~~~~~~~~~
sortbooks.cpp:100:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |                     if(0 <= x && x < kek.size()) {
      |                                  ~~^~~~~~~~~~~~

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