제출 #498784

#제출 시각아이디문제언어결과실행 시간메모리
498784ahmedfouadnewXOR Sum (info1cup17_xorsum)C++17
0 / 100
275 ms131072 KiB
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
int n;
vector<int>a[33];
signed main()
{
    scanf("%lld",&n);
    long long cnto=0,cnte=0;
    for(int i=0;i<n;i++)
    {
        int x;
        scanf("%lld",&x);
        cnto+=(x%2);
        cnte+=(x%2==0);
        int cur=0;
        for(int j=0;j<30;j++)
        {
            cur+=x&(1ll<<j);
            a[j].pb(cur);
        }
    }
    for(int i=0;i<30;i++) sort(a[i].begin(),a[i].end());
    int ans=0;
    for(int i=0;i<30;i++)
    {
        int cur=0;
        for(int j=0;j<n;j++)
        {
            cur+=n-(lower_bound(a[i].begin(),a[i].end(),(1ll<<(i+1))-a[i][j])-a[i].begin());
        }
        ans|=(cur&1ll)*(1ll<<(i+1));
    }
    ans|=(1ll*cnto*cnte)&1ll;
    cout<<ans<<endl;
}

컴파일 시 표준 에러 (stderr) 메시지

xorsum.cpp: In function 'int main()':
xorsum.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
xorsum.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         scanf("%lld",&x);
      |         ~~~~~^~~~~~~~~~~
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...