Submission #1221611

#	Time	Username	Problem	Language	Result	Execution time	Memory
1221611		mayac	XORanges (eJOI19_xoranges)	C++20	55 / 100	1057 ms	3848 KiB

xoranges

#include <iostream>
#include <vector>
#include <queue>
using namespace std;
int main(){
    int n,q,a,b,t,ans;
    cin>>n>>q;
    vector<int> v(n),vxor(n+1,0),yesno0(n+1,0),yesno1(n+1,0);
    for(int i=0;i<n;i++){
        cin>>v[i];
        vxor[i+1]=vxor[i]^v[i];
        if(i%2==0){
            yesno0[i+1]=v[i];
            if(i>0)yesno0[i+1]=v[i]^yesno0[i-1];
        }else{
            yesno1[i+1]=v[i];
            yesno1[i+1]=v[i]^yesno1[i-1];
        }
    }
    while(q--){
        cin>>t>>a>>b;a--;
        if(t==1){
            v[a]=b;
        }else{
            ans=0;
            if((b-a)%2==1){
                for(int i=a;i<b;i+=2){
                    ans=ans^v[i];
                }
            }
        
            cout<<ans<<"\n";
        }
    }
}

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