Submission #67694

#	Time	Username	Problem	Language	Result	Execution time	Memory
67694		tatatan	XOR Sum (info1cup17_xorsum)	C++11	7 / 100	1675 ms	8320 KiB

xorsum

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define pii pair<int,int>
#define LL long long
#define st first
#define nd second
#define endl '\n'
using namespace std;
 
const int MAXN=1000005;
LL n,a[MAXN],b[MAXN];
LL ans;
 
int main() {
 
	scanf("%lld",&n);
	for(int i=0;i<n;++i)
		scanf("%lld",&a[i]);
	LL ans2=0;
	for(int i=0;i<n;++i)
		for(int j=i;j<n;++j)
			ans2^=a[i]+a[j];
	printf("%lld\n",ans2);
 
}

Compilation message (stderr)

xorsum.cpp: In function 'int main()':
xorsum.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
  ~~~~~^~~~~~~~~~~
xorsum.cpp:19:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&a[i]);
   ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 21
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23