Submission #288154

#	Time	Username	Problem	Language	Result	Execution time	Memory
288154		errorgorn	Xoractive (IZhO19_xoractive)	C++14	Compilation error	0 ms	0 KiB

Xoractive

//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

const int n=8;

int arr[2*n];
multiset<int> s;

bool can(int i){
	rep(x,0,n) if (!s.count(arr[x]^i)) return false;
	return true;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	rep(x,0,2*n){
		do{
			arr[x]=rng()%1000;
		} while (s.count(arr[x]));
		s.insert(arr[x]);
	}
	
	s.clear();
	rep(x,0,n) rep(y,n,2*n) s.insert(arr[x]^arr[y]);
	
	rep(x,0,2*n) cout<<arr[x]<<" "; cout<<endl<<endl;
	
	rep(x,0,32){
		if (can(x)) cout<<x<<endl;
	}
}

Compilation message (stderr)

Xoractive.cpp: In function 'int main()':
Xoractive.cpp:19:26: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   19 | #define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
      |                          ^~~
Xoractive.cpp:54:2: note: in expansion of macro 'rep'
   54 |  rep(x,0,2*n) cout<<arr[x]<<" "; cout<<endl<<endl;
      |  ^~~
Xoractive.cpp:54:34: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   54 |  rep(x,0,2*n) cout<<arr[x]<<" "; cout<<endl<<endl;
      |                                  ^~~~
/tmp/cc8oxMiw.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccKlyAFm.o:Xoractive.cpp:(.text.startup+0x0): first defined here
/tmp/cc8oxMiw.o: In function `main':
grader.cpp:(.text.startup+0x14c): undefined reference to `guess(int)'
collect2: error: ld returned 1 exit status