Submission #1219210

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219210		lizi14	XORanges (eJOI19_xoranges)	C++20	0 / 100	256 ms	3112 KiB

xoranges

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,m;
    cin>>n>>m;
    int x[n];
    long long ke=0,l=0;
    for(int i=0; i<n; i++){
        cin>>x[i];
        if(i%2==0){
            l^=x[i];
        }
        else{
            ke^=x[i];
        }
    }
    for(int i=0; i<m; i++){
        int j;
        cin>>j;
        if(j==1){
            int k,g;
            cin>>k>>g;
            k--;
            if(k%2==0){
                l^=x[k];
                l^=g;
            }
            else{
                ke^=x[k];
                ke^=g;
            }
        }
        else{
            int k,g;
            cin>>k>>g;
            k--;
            g--;
            if(g-k+1%2==0){
                cout<<0<<endl;
            }
            else{
                if(k%2==0){
                    cout<<l<<endl;
                }
                else cout<<ke<<endl;
            }
        }
    }
}

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