Submission #992625

#	Time	Username	Problem	Language	Result	Execution time	Memory
992625		amin_2008	A Difficult(y) Choice (BOI21_books)	C++17	0 / 100	2 ms	344 KiB

books

#include <iostream>
#include <fstream>
#include <cstdio>
#include <queue>
#include <vector>
#include <algorithm>
#include <iomanip>
#include <map>
#include <cassert>
#include <unordered_map>
#include <set>
#include <stack>
#include <cstring>
#include <cmath>
#include <bitset>
#include <random>
#include <numeric>
#include <cstdlib> 

#include "books.h"

using namespace std;
//
// --- Sample implementation for the task books ---
//
// To compile this program with the sample grader, place:
//     books.h books_sample.cpp sample_grader.cpp
// in a single folder and run:
//     g++ books_sample.cpp sample_grader.cpp
// in this folder.
//

const int sz = 2e5 + 5;

int a[sz];

struct SegTree
{
    vector<int> tree;
    SegTree(int n) 
    {
        tree.resize(n << 2);
    }
    void build(int l, int r, int in) 
    {
        if (l == r) 
        {
            tree[in] = a[l];
            return;
        }
        int mid = (l + r) >> 1;
        build(l, mid, in << 1);
        build(mid + 1, r, in << 1 | 1);
        tree[in] = tree[in << 1] + tree[in << 1 | 1];
    }
    int get(int lx, int rx, int l, int r, int in) 
    {
        if (lx > rx or lx > r or rx < l) return 0;
        if (l >= lx and r <= rx) return tree[in];
        int mid = (l + r) >> 1;
        return get(lx, rx, l, mid, in << 1) + get(lx, rx, mid + 1, r, in << 1 | 1);
    }
};


void solve(int N, int K, long long A, int S) {
    for(int i = 1; i <= N; i++) a[i] = skim(i);
    SegTree st(N);
    st.build(1, N, 1);
    for(int i = 1; i <= N; i++) if (st.get(i, i + K, 1, N, 1) >= A and st.get(i, i + K - 1, 1, N, 1) <= 2 * A) 
    {
        vector<int> res;
        for(int j = i; j <= i + K - 1; j++) res.push_back(a[j]);
        answer(res);
        return;
    }
    impossible();
}

// 15 3 42 15
// 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21   

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20