Submission #496774

#	Time	Username	Problem	Language	Result	Execution time	Memory
496774		Nalrimet	XOR Sum (info1cup17_xorsum)	C++17	Compilation error	0 ms	0 KiB

xorsum

#include<bits/stdc++.h>

#pragma GCC optimization("g", on)
#pragma GCC optimize ("inline")
#pragma GCC optimization("03")
#pragma GCC optimization("unroll-loops")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popused,abm,mmx,avx,tune=native")
using namespace std;

const int N = 1e6 + 5;
const long long inf = 1000000000;
#define ll long long

#define F first
#define S second
#define pb push_back

int n, x[N];
//map<int, bool> used;
//map<int, int> cnt;
//vector<int> v;
long long res;

 main() {

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n;

    for(int i = 1; i <= n; ++i){
        cin >> x[i];
    }

    for(int i = 1; i <= n; ++i){
        for(int j = i; j <= n; ++j){
            res ^= x[i] + x[j];
        }
    }

    cout << res;

}

Compilation message (stderr)

xorsum.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization("g", on)
      | 
xorsum.cpp:5: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    5 | #pragma GCC optimization("03")
      | 
xorsum.cpp:6: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    6 | #pragma GCC optimization("unroll-loops")
      | 
cc1plus: error: attribute 'popused' argument 'target' is unknown
xorsum.cpp:26:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   26 |  main() {
      |  ^~~~