Submission #1301559

#	Time	Username	Problem	Language	Result	Execution time	Memory
1301559		efeg	A Difficult(y) Choice (BOI21_books)	C++20	0 / 100	2 ms	1084 KiB

books

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

#define pb push_back
#define all(v) v.begin(),v.end()
using i64 = long long; 
template<typename T>
using vec = vector<T>;


vec<i64> x(1e5 + 100,-1); 
i64 get(int idx){
    if (x[idx] != -1) return x[idx]; 
    return x[idx] = skim(idx); 
}

void solve(int N, int K, long long A, int S) {
    i64 sm = 0; 
    for (int i = 1; i <= K-1; i++) sm += get(i);

    int s = K,e = N,ans = N; 
    while (s <= e){
        int m = (s + e) / 2; 
        if (sm + get(m) > A){
            ans = m; 
            e = m-1; 
        } 
        else {
            s = m+1; 
        }
    }
    
    vec<int> vecans(K); 
    iota(all(vecans),1); 
    
    if (sm + get(K) >= A && sm + get(K) <= 2 * A){
        answer(vecans); 
    }

    for (int i = 0; i < K; i++){
        sm -= get(vecans[i]); 
        vecans[i] = ans - K + 1 + i; 
        sm += get(vecans[i]); 

        if (sm >= A && sm <= 2 * A){
            answer(vecans); 
        }
    }

    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