Submission #1334304

#	Time	Username	Problem	Language	Result	Execution time	Memory
1334304		enson	A Difficult(y) Choice (BOI21_books)	C++20	0 / 100	1 ms	1180 KiB

books

#include <bits/stdc++.h>
using namespace std;
#include "books.h"

void solve(int N, int K, long long A, int S){
    int l = 1, r = N;
    int m = (l+r)/2;
    vector<long long>F(N+1, 0);
    while (l < r){
        m = (l+r)/2;
        long long x = skim(m);
        F[m] = x;
        if (x >= A){
            r = m;
        } else {
            l = m+1;
        }
    }
    if (l < K-1 || l == 1) impossible();
    long long ans = 0;
    for(int i = 1; i < K; i++){
        F[i] = skim(i);
        ans += F[i];
    }
    ans += F[l];
    if (ans <= 2*A){
        vector<int>v;
        for(int i = 1; i < K; i++)v.push_back(i);
        v.push_back(l);
        answer(v);
    }
    F[K-1] = skim(K-1);
    ans -= F[l];
    ans += F[K-1];
    int t = 0;
    while (ans < A){
        ans -= F[t];
        F[l-t-1] = skim(l-t-1);
        ans += F[l-t-1];
        t++;
        if (t >= K) break;
    }
    if (ans >= A){
        vector<int>v;
        for(int i = t; i < K; i++)v.push_back(i);
        for(int i = l-t; i < l; i++)v.push_back(i);
        answer(v);
    } 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