Submission #1032342

#	Time	Username	Problem	Language	Result	Execution time	Memory
1032342		Maite_Morale	A Difficult(y) Choice (BOI21_books)	C++14	0 / 100	2 ms	840 KiB

books

#include <bits/stdc++.h>

#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.
//

typedef long long ll ;
#define vll vector<ll>
#define vi vector<int>
void solve(int n, int k, long long A, int S) {
    vi v(n+5,0),r={};ll s=0;
    /*
    for(int i=1;i<=k;i++){
        r.push_back(i);
        v[i]=skim(i);s+=v[i];
        if(s>2*A){
            impossible();
            return;
        }
    }
    ll last=n+1;
    for(int i=k;i>0;i--){
        s-=v[i];
        ll p=i,f=last;
        while(abs(p-f)!=1){
            ll md=(p+f)/2;
            if(v[md]==0)v[md]=skim(md);
            if(s+v[md]<A)p=md;
            else if(s+v[md]>2*A)f=md;
                 else{
                    r[i-1]=md;
                    answer(r);
                    return;
                 }
        }for(auto x : r)cout<<x<<" ";cout<<"\n";
        r[i-1]=p;   
        s+=v[p];
        last=p;
    }
impossible();
*/
    for(int i=1;i<=n;i++){
        v[i]=skim(i);
        if(i<=k){
            s+=v[i];
            r.push_back(i);
        }
    }
    if(s>2+A)impossible();
    r.push_back(n+1);

    for(int i=k;i>0;i--){
        s-=v[i];
        for(int j=i;j<r[i] && s+v[j]<=2*A;j++){
            r[i-1]=j;
            if(s>=A)break;
        }
        s+=v[r[i-1]];
        if(s>=A)break;
    }
    r.pop_back();
    if(s>=A)answer(r);
    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