제출 #378060

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
378060		MilosMilutinovic	Rice Hub (IOI11_ricehub)	C++14	100 / 100	29 ms	2688 KiB

ricehub

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

using namespace std;

int besthub(int n, int len, int* a, long long b) {
  vector<long long> pref(n);
  for (int i = 0; i < n; i++) {
    if (i == 0) {
      pref[i] = a[i];
    } else {
      pref[i] = pref[i - 1] + a[i];
    }
  }
  auto Can = [&](int l, int r) {
    int mid = l + r >> 1;
    long long ll = (long long) a[mid] * (mid - l + 1) - (pref[mid] - (l == 0 ? 0LL: pref[l - 1]));
    long long rr = pref[r] - pref[mid] - (long long) a[mid] * (r - mid);
    return ll + rr <= b;
  };
  int ans = 1;
  for (int i = 0; i < n; i++) {
    int bot = i, top = n - 1, mx = 0;
    while (bot <= top) {
      int mid = bot + top >> 1;
      if (Can(i, mid)) {
        mx = mid - i + 1;
        bot = mid + 1;
      } else {
        top = mid - 1;
      }
    }
    ans = max(ans, mx);
  }
  return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

ricehub.cpp: In lambda function:
ricehub.cpp:16:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   16 |     int mid = l + r >> 1;
      |               ~~^~~
ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:25:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   25 |       int mid = bot + top >> 1;
      |                 ~~~~^~~~~

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32