Submission #729139

#	Time	Username	Problem	Language	Result	Execution time	Memory
729139		Jean7	A Difficult(y) Choice (BOI21_books)	C++14	0 / 100	1 ms	284 KiB

books

#include <bits/stdc++.h>
#include "books.h"
#define mid ((l+r)>>1)

using namespace std ;

const int N = 1e5+5 ;

int a[N] ;

void solve(int n, int k, long long A, int s) {
    int sum = 0 ;
    vector <int> v ;
    for ( int i = 1 ; i <= k ; i++ ) {
        a[i] = skim(i) ;
        sum += a[i] ;
        v.push_back(i) ;
    }
    if ( sum > 2 * A ) {
        impossible () ;
    }
    int id = k , xx = n+1 ;
    while ( sum < A && id > 0 ) {
        int l = id+1 , r = xx ;
        while ( r - l > 1 ) {
            if ( !a[mid] ) {
                a[mid] = skim(mid) ;
            }
            if ( sum + a[mid] - a[id] <= 2 * A ) {
                l = mid ;
            }
            else {
                r = mid ;
            }
        }
        sum -= a[id] ;
        sum += a[l] ;
        v[id-1] = l ;
        xx = l ;
        id-- ;
    }
    if ( sum < A ) {
        impossible () ;
    }
    answer(v) ;
}

• 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