제출 #987250

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
987250		VMaksimoski008	A Difficult(y) Choice (BOI21_books)	C++17	45 / 100	2 ms	696 KiB

books

#include <bits/stdc++.h>
#include "books.h"

using namespace std;
using ll = long long;
using ull = unsigned long long;

map<int, ull> memo;

ull ask(int p) {
    if(memo.count(p)) return memo[p];
    return memo[p] = skim(p);
}

void solve(int N, int K, ll A, int S) {
    int l=1, r=N-K+1;
    while(l <= r) {
        int mid = (l + r) / 2;
        ull sum = 0;
        
        for(int i=mid; i<=mid+K-1; i++) {
            if(sum > 2 * A) break;
            sum += ask(i);
        }

        if(sum >= A && sum <= 2 * A) {
            vector<int> ans;
            for(int i=mid; i<=mid+K-1; i++) ans.push_back(i);
            answer(ans);
        }

        if(sum < A) l = mid + 1;
        if(sum > 2 * A) r = mid - 1;
    }

    l=K, r=N-K+1;
    int p = -1;

    while(l <= r) {
        int mid = (l + r) / 2;
        if(ask(mid) >= A) p = mid, r = mid - 1;
        else l = mid + 1;
    }

    if(p != -1) {
        ull sum = ask(p);
        for(int i=1; i<=K-1; i++) sum += ask(i);
        if(sum >= A && sum <= 2 * A) {
            vector<int> ans;
            for(int i=1; i<=K-1; i++) ans.push_back(i);
            ans.push_back(p);
            answer(ans);
        }
    }
    
    impossible();
    return ;
}

컴파일 시 표준 에러 (stderr) 메시지

books.cpp: In function 'void solve(int, int, ll, int)':
books.cpp:22:20: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   22 |             if(sum > 2 * A) break;
      |                ~~~~^~~~~~~
books.cpp:26:16: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   26 |         if(sum >= A && sum <= 2 * A) {
      |            ~~~~^~~~
books.cpp:26:28: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   26 |         if(sum >= A && sum <= 2 * A) {
      |                        ~~~~^~~~~~~~
books.cpp:32:16: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   32 |         if(sum < A) l = mid + 1;
      |            ~~~~^~~
books.cpp:33:16: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   33 |         if(sum > 2 * A) r = mid - 1;
      |            ~~~~^~~~~~~
books.cpp:41:21: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   41 |         if(ask(mid) >= A) p = mid, r = mid - 1;
      |            ~~~~~~~~~^~~~
books.cpp:48:16: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   48 |         if(sum >= A && sum <= 2 * A) {
      |            ~~~~^~~~
books.cpp:48:28: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   48 |         if(sum >= A && sum <= 2 * A) {
      |                        ~~~~^~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 15 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20