제출 #783545

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
783545		Hanksburger	A Difficult(y) Choice (BOI21_books)	C++17	0 / 100	1 ms	304 KiB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> ans;
void solve(int n, int k, long long a, int s)
{
    long long x[11], y[11], l=1, r=n+1;
    while (l<r)
    {
        int m=(l+r)/2;
        if (skim(m)>=a)
            r=m;
        else
            l=m+1;
    }
    for (int i=1; i<=k; i++)
        x[i]=x[i-1]+skim(i), y[i]=y[i-1]+skim(l-i);
    if (l<=n)
    {
        if (x[k-1]+skim(l)<=a*2)
        {
            for (int i=1; i<k; i++)
                ans.push_back(i);
            ans.push_back(l);
            answer(ans);
            return;
        }
    }
    for (int i=0; i<=k; i++)
    {
        if (x[k-i]+y[i]>=a && x[k-i]+y[i]<=a*2)
        {
            for (int j=1; j<=k-i; j++)
                ans.push_back(j);
            for (int j=l-i; j<l; j++)
                ans.push_back(j);
            answer(ans);
            return;
        }
    }
    impossible();
}

컴파일 시 표준 에러 (stderr) 메시지

books.cpp: In function 'void solve(int, int, long long int, int)':
books.cpp:20:18: warning: 'x[<unknown>]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   20 |         if (x[k-1]+skim(l)<=a*2)
      |             ~~~~~^

• 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