Submission #553558

#	Time	Username	Problem	Language	Result	Execution time	Memory
553558		new_acc	A Difficult(y) Choice (BOI21_books)	C++14	100 / 100	1 ms	348 KiB

books

#include<bits/stdc++.h>
#include "books.h"
#define fi first
#define se second
#define pitem item*
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<ll> vl;
const int N=1e6+10;
const int SS=1<<19;
const int INFi=2e9;
const ll INFl=1e18;
const ll mod2=998244353;
const ll mod=1e9+7;
const ll mod3=1000696969;
const ll p=70032301;
const ull p2=913;
const int L=20;
ll t[N];
ll que(int a){
    if(t[a]) return t[a];
    t[a]=skim(a);
    return t[a];
}
void solve(int n,int k,ll a,int s){
    int pocz=1,kon=n,sr,res=n+1;
    while(pocz<=kon){
        sr=(pocz+kon)>>1;
        if(que(sr)>=a) res=sr,kon=sr-1;
        else pocz=sr+1;
    }
    if(res<k){
        impossible();
        return;
    }
    ll last=(res==n+1?INFl:que(res));
    ll sum=0;
    for(int i=1;i<k;i++) sum+=que(i);
    sum+=last;
    vi ans;
    if(sum>=a and sum<=(a<<1LL)){
        for(int i=1;i<k;i++) ans.push_back(i);
        ans.push_back(res);
        answer(ans);
        return;
    }
    if(res==k){
        impossible();
        return;
    }
    sum-=last;
    sum+=que(k);
    ll sum2=0;
    res--;
    for(int i=res;i>=res-k+1;i--) sum2+=que(i);
    if(sum>(a<<1LL) or sum2<a){
        impossible();
        return;
    }
    for(int i=1;i<=k;i++){
        int dr=res-i+1;
        if(dr<=k or sum>=a){
            ans.push_back(i);
            continue;
        }
        ans.push_back(dr);
        sum+=t[dr]-t[i];
    }
    answer(ans);
}
		

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