Submission #634648

#	Time	Username	Problem	Language	Result	Execution time	Memory
634648		rockoana	Rice Hub (IOI11_ricehub)	C++17	Compilation error	0 ms	0 KiB

ricehub

#include <vector>

#include "ricehub.h"

using namespace std;

vector<long long> s;
long long cost(int st, int dr, int& X[]) {
  int mid = (st + dr) / 2;
  // X[mid + 1] - X[mid] + X[mid + 2] - X[mid]...X[dr] - X[mid];
  // X[mid] - X[mid] + X[mid] - X[mid - 1] + ... + X[mid] - X[st]

  long long res = s[dr] - s[mid] - s[mid];
  if (st != 0) {
    res += s[st - 1];
  }

  if ((dr - st + 1) % 2 == 1) {
    res += X[mid];
  }

  return res;
}

int besthub(int R, int L, int X[], long long B) {
  s.assign(R, 0);
  for (i64 i = 0; i < R; i++) {
    s[i] += X[i];
    if (i != 0) {
      s[i] += s[i - 1];
    }
  }

  int st = 0;
  int res = 0;
  for (int i = 0; i < R; i++) {
    while (cost(st, i, X) > B) {
      st++;
    }

    res = max(res, i - st + 1);
  }

  return res;
}

Compilation message (stderr)

ricehub.cpp:8:37: error: declaration of 'X' as array of references
    8 | long long cost(int st, int dr, int& X[]) {
      |                                     ^
ricehub.cpp: In function 'long long int cost(...)':
ricehub.cpp:9:14: error: 'st' was not declared in this scope; did you mean 's'?
    9 |   int mid = (st + dr) / 2;
      |              ^~
      |              s
ricehub.cpp:9:19: error: 'dr' was not declared in this scope
    9 |   int mid = (st + dr) / 2;
      |                   ^~
ricehub.cpp:19:12: error: 'X' was not declared in this scope
   19 |     res += X[mid];
      |            ^
ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:27:8: error: 'i64' was not declared in this scope
   27 |   for (i64 i = 0; i < R; i++) {
      |        ^~~
ricehub.cpp:27:19: error: 'i' was not declared in this scope
   27 |   for (i64 i = 0; i < R; i++) {
      |                   ^