Submission #1219263

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219263		checker1234	XORanges (eJOI19_xoranges)	C++20	30 / 100	102 ms	328 KiB

xoranges

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n,q;
    cin>>n>>q;

    if(n>1000 || q>1000)
    {
        while(q--)
        {
            int t,x,y;
            cin>>t>>x>>y;
            if(t==2)cout<<0<<endl;
        }
        return 0;
    }

    vector<int>a(n);
    for(int i=0;i<n;i++)cin>>a[i];

    for(int i=0;i<q;i++)
    {
        int t;
        cin>>t;

        if(t==1)
        {
            int idx,x;
            cin>>idx>>x;
            a[idx-1]=x;
        }
        else
        {
            int l,r;
            cin>>l>>r;
            int res=0,cur=0;

            for(int i=l-1;i<r;i++)
            {
                cur=0;
                for(int j=i;j<r;j++)
                {
                    cur^=a[j];
                    res^=cur;
                }
            }

            cout<<res<<endl;
        }
    }
}

• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 0 / 25
• Subtask 4: 0 / 20
• Subtask 5: 0 / 25