Submission #399542

#	Time	Username	Problem	Language	Result	Execution time	Memory
399542		Temmie	A Difficult(y) Choice (BOI21_books)	C++17	Compilation error	0 ms	0 KiB

books

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

typedef long long ll;

void solve(int n, int k, ll a, int s) {
	
	std::vector <ll> vals(n + 1, -1), use;
	vals[n] = skim(n);
	if (vals[n] * ll(k) < a) {
		impossible();
		return;
	}
	int l = k, r = n;
	while (l < r) {
		int mid = (l + r) >> 1;
		if (vals[mid] == -1LL) vals[mid] = skim(mid);
		if (ll(k) * vals[mid] >= a) r = mid;
		else l = mid + 1;
	}
	std::vector <int> res;
	ll sum = 0;
	for (int i = 1 + l - k; i < l + 1; i++) {
		if (vals[i] == -1LL) vals[i] = skim(i);
		res.push_back(i);
		use.push_back(vals[i]);
	}
	for (ll x : use) sum += x;
	if (a <= sum) {
		if (sum <= a + a) answer(res);
		else impossible();
		return;
	}
	for (int i = l + 1; i < 1 + l + k; i++) {
		if (vals[i] == -1LL) vals[i] = skim(i);
		sum += vals[i];
		sum -= use[i - l - 1];
		res.push_back(i);
		if (a <= sum && sum <= a + a) {
			std::vector <int> ans;
			for (int j = i - l; j < (int)res.size(); j++) {
				ans.push_back(res[j]);
			}
			answer(ans);
			return;
		} else if (sum > a + a) {
			ll newsum = vals[i];
			std::vector <int> ans = { i };
			for (int j = 1; j < k; j++) {
				ans.push_back(j);
				if (vals[j] == -1LL) vals[j] = skim(j);
				newsum += vals[j];
			}
			if (newsum >= a && newsum <= a + a) {
				std::sort(ans.begin(), ans.end()); // ???
				answer(ans);
				return;
			}
			impossible();
			return;
		}
	}
	impossible();
	
}

Compilation message (stderr)

books.cpp: In function 'void solve(int, int, ll, int)':
books.cpp:9:12: error: 'skim' was not declared in this scope
    9 |  vals[n] = skim(n);
      |            ^~~~
books.cpp:11:3: error: 'impossible' was not declared in this scope
   11 |   impossible();
      |   ^~~~~~~~~~
books.cpp:30:21: error: 'answer' was not declared in this scope
   30 |   if (sum <= a + a) answer(res);
      |                     ^~~~~~
books.cpp:31:8: error: 'impossible' was not declared in this scope
   31 |   else impossible();
      |        ^~~~~~~~~~
books.cpp:44:4: error: 'answer' was not declared in this scope
   44 |    answer(ans);
      |    ^~~~~~
books.cpp:56:5: error: 'answer' was not declared in this scope
   56 |     answer(ans);
      |     ^~~~~~
books.cpp:59:4: error: 'impossible' was not declared in this scope
   59 |    impossible();
      |    ^~~~~~~~~~
books.cpp:63:2: error: 'impossible' was not declared in this scope
   63 |  impossible();
      |  ^~~~~~~~~~