Submission #600228

#	Time	Username	Problem	Language	Result	Execution time	Memory
600228		_Avocado_	Rice Hub (IOI11_ricehub)	C++14	Compilation error	0 ms	0 KiB

ricehub

#include <bits/stdc++.h>
#include "ricehub.h"
//#define int int64_t
using namespace std;

int bsearch(int n, int len, vector<int>&fred, vector<int>&prefix, int budget){
	int l = -1;
	int r = n+1;
	
	while(r-l > 1){
		int m = (r+l)/2;
		int ans = 1e9;
		int mid = m/2+1;
		for(int i = m; i<=n; ++i){
			int hub = fred[mid];
			int one = ((m/2) * hub)-(prefix[mid-1]-prefix[i-m]);
			int two = (prefix[i]-prefix[mid-(1-m%2)]) - ((m/2)*hub);
			++mid;
			ans = min(ans, one+two);
		}
		if(ans <= budget) l = m;
		else r = m;

	}
	return l;
}
			

int besthub(int R, int L, int X[], long long B){
	int n = R;
	int len = L;
	int budget = B;
	vector<int>prefix(n+1);
	for(int i = 1; i<=n; ++i){
		prefix[i] = prefix[i-1] + X[i-1];
	}
	
	vector<int>fred;
	fred.push_back(0);
	for(auto u: X) fred.push_back(u);
	
	return bsearch(n, len, fred, prefix, budget);
}

Compilation message (stderr)

ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:40:14: error: 'begin' was not declared in this scope; did you mean 'std::begin'?
   40 |  for(auto u: X) fred.push_back(u);
      |              ^
      |              std::begin
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
                 from ricehub.cpp:1:
/usr/include/c++/10/valarray:1224:5: note: 'std::begin' declared here
 1224 |     begin(const valarray<_Tp>& __va)
      |     ^~~~~
ricehub.cpp:40:14: error: 'end' was not declared in this scope; did you mean 'std::end'?
   40 |  for(auto u: X) fred.push_back(u);
      |              ^
      |              std::end
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
                 from ricehub.cpp:1:
/usr/include/c++/10/valarray:1244:5: note: 'std::end' declared here
 1244 |     end(const valarray<_Tp>& __va)
      |     ^~~