Submission #1308878

#	Time	Username	Problem	Language	Result	Execution time	Memory
1308878		sweetwibu2k8	Coins (IOI17_coins)	C++20	Compilation error	0 ms	0 KiB

coins

#include <bits/stdc++.h>
using namespace std;

#define endl "\n"
#define fi first
#define se second
#define pb push_back
#define p_q priority_queue
#define bit(n, i) (((n)>>(i))&1)
#define all(x) x.begin(), x.end()

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,int> pli;
typedef vector <vector <int> > vvi;

const int M = 1e6 + 6;
const int mod = 1e9 + 7;
const int inf = 1e9 + 7;

void maximize (int &a, int b) { if (a < b) a = b; }
void minimize (int &a, int b) { if (a > b) a = b; }
void add (int &a, int b) { a += b; if (a >= mod) a -= mod; }
void del (int &a, int b) { a -= b; if (a < 0) a += mod; }

int[] coin_flips (int[] b, int c)
{
	int T = 0;
	for (int i = 0; i < 64; i ++)
		if (b[i] == 1) T ^= i;
	int id = T ^ c;
	return {id};
}

int find_coin (int[] b)
{
	int T = 0;
	for (int i = 0; i < 64; i ++)
		if (b[i] == 1) T ^= i;
	return T;
}

Compilation message (stderr)

coins.cpp:26:4: error: structured binding declaration cannot have type 'int'
   26 | int[] coin_flips (int[] b, int c)
      |    ^~
coins.cpp:26:4: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
coins.cpp:26:4: error: empty structured binding declaration
coins.cpp:26:7: error: expected initializer before 'coin_flips'
   26 | int[] coin_flips (int[] b, int c)
      |       ^~~~~~~~~~
coins.cpp:35:22: error: expected ',' or '...' before 'b'
   35 | int find_coin (int[] b)
      |                      ^
coins.cpp: In function 'int find_coin(int*)':
coins.cpp:39:21: error: 'b' was not declared in this scope
   39 |                 if (b[i] == 1) T ^= i;
      |                     ^
grader.cpp: In function 'void shuffle(std::vector<int>&)':
grader.cpp:88:23: warning: 'void std::random_shuffle(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<int*, vector<int> >]' is deprecated: use 'std::shuffle' instead [-Wdeprecated-declarations]
   88 |         random_shuffle(v.begin(), v.end());
      |         ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/algorithm:61,
                 from grader.cpp:5:
/usr/include/c++/13/bits/stl_algo.h:4581:5: note: declared here
 4581 |     random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last)
      |     ^~~~~~~~~~~~~~