Submission #1240488

#	Time	Username	Problem	Language	Result	Execution time	Memory
1240488		MuhammadSaram	Packing Biscuits (IOI20_biscuits)	C++20	Compilation error	0 ms	0 KiB

biscuits

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

using namespace std;

#define ll long long

long long count_tastiness(long long x, vector<long long> a) {
	ll su=0;
	reverse(a.begin(),a.back());
	while (a.size() && !a.back())
		a.pop_back();
	reverse(a.begin(),a.end());
	while (a.size() && !a.back())
		a.pop_back();
	ll mul=1;
	for (int i=0;i<a.size();i++)
	{
		su+=a[i]*(1ll<<i);
		if (su<(1ll<<i)) mul*=2;
	}
	return (su+1)/mul;
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:10:16: error: no matching function for call to 'reverse(std::vector<long long int>::iterator, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&)'
   10 |         reverse(a.begin(),a.back());
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/vector:62,
                 from biscuits.h:1,
                 from biscuits.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:1145:5: note: candidate: 'template<class _BIter> constexpr void std::reverse(_BIter, _BIter)'
 1145 |     reverse(_BidirectionalIterator __first, _BidirectionalIterator __last)
      |     ^~~~~~~
/usr/include/c++/11/bits/stl_algo.h:1145:5: note:   template argument deduction/substitution failed:
biscuits.cpp:10:16: note:   deduced conflicting types for parameter '_BIter' ('__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' and 'long long int')
   10 |         reverse(a.begin(),a.back());
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from biscuits.cpp:2:
/usr/include/c++/11/pstl/glue_algorithm_defs.h:249:1: note: candidate: 'template<class _ExecutionPolicy, class _BidirectionalIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::reverse(_ExecutionPolicy&&, _BidirectionalIterator, _BidirectionalIterator)'
  249 | reverse(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last);
      | ^~~~~~~
/usr/include/c++/11/pstl/glue_algorithm_defs.h:249:1: note:   template argument deduction/substitution failed:
biscuits.cpp:10:16: note:   candidate expects 3 arguments, 2 provided
   10 |         reverse(a.begin(),a.back());
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~