Submission #399089

#	Time	Username	Problem	Language	Result	Execution time	Memory
399089		egekabas	A Difficult(y) Choice (BOI21_books)	C++14	0 / 100	2 ms	584 KiB

books

#include <bits/stdc++.h>
#include "books.h"
#define all(x) (x).begin(), (x).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<int, int> pii;
typedef pair<ld, ld> pld;

//
// --- 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.
//
void finish(deque<ll> &ans){
    vector<int> v;
    for(auto u : ans)
        v.pb(u);
    answer(v);
}
vector<int> befask;
ll ask(ll x){
    if(befask[x]) return befask[x];
    return (befask[x] = skim(x));
}
void solve(int N, int K, long long A, int S) {
    befask.resize(N+1);
    deque<ll> ans;
    deque<ll> val;
    ll curval = 0;
    for(ll i = 1; i <= K; ++i){
        ans.pb(i);
        val.pb(ask(i));
        curval += val.back();
    }
    if(curval > 2*A){
        impossible();
        return;
    }
    if(curval >= A){
        finish(ans);
        return;
    }
    ll l = K+1, r = N;
    while(l < r){
        ll m = (l+r+1)/2;
        if(curval-val[0]+ask(m) > 2*A)
            r = m-1;
        else
            l = m;
    }
    for(ll i = l; i > K && curval < A; --i){
        ll addval = ask(i);
        if(addval <= val[0]) break;
        ans.pop_front();
        curval -= val[0];
        val.pop_front();

        ans.pb(i);
        val.pb(addval);
        curval += addval;
    }
    if(curval >= A && 2*A >= curval)
        finish(ans);
    else
        impossible();
}

• 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