Submission #1219272

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219272		checker1234	XORanges (eJOI19_xoranges)	C++20	30 / 100	1091 ms	1192 KiB

xoranges

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

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

    while(q--)
    {
        int t;
        cin>>t;
        if(t==1)
        {
            int i,x;
            cin>>i>>x;
            a[i-1]=x;
        }
        else
        {
            int l,r;
            cin>>l>>r;
            l--; r--;

            int ans=0;
            for(int i=l;i<=r;i++)
            {
                int cur=0;
                for(int j=i;j<=r;j++)
                {
                    cur^=a[j];
                    ans^=cur;
                }
            }
            cout<<ans<<endl;
        }
    }
}

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