Submission #794417

#	Time	Username	Problem	Language	Result	Execution time	Memory
794417		Godgift42	XORanges (eJOI19_xoranges)	C++14	38 / 100	428 ms	9632 KiB

xoranges

#include <bits/stdc++.h>
using namespace std;

int main(){
    long long n,q;
    cin >> n >> q;
    vector<long long> a,p;
    vector<long long> a2,p2;
    a.push_back(0);a2.push_back(0);
    p.push_back(0);p2.push_back(0);
    for(long long i=1;i<=n;i++){
        long long x;
        cin >> x;
        if(i%2==1){
            a.push_back(x^a[i/2]);
            p.push_back(x);
        }
        else{
            a2.push_back(x^a2[i/2-1]);
            p2.push_back(x);
        }
    }
    while(q--){
        long long action;
        cin >> action;
        if(action==1){
            long long pos,ch;
            cin >> pos >> ch;
            if(pos%2!=0){
                for(int i=1;i<=(n+1)/2;i++){
                    if(i==(pos+1)/2){
                        a[i]=a[i-1]^ch;
                    }
                    else if(i>(pos+1)/2){
                        a[i]=a[i-1]^p[i];
                    }
                }
            }
            else {
                for(int i=1;i<=n/2;i++){
                    if(i==pos/2){
                        a2[i]=a2[i-1]^ch;
                    }
                    else if(i>pos/2){
                        a2[i]=a2[i-1]^p2[i];
                    }
                }
            }
        }
        else{
            long long l,u;
            cin >> l >> u;
            if((u-l)%2==1) cout << 0<<"\n";
            else{
                if(l%2==1){
                    long long xum =a[(u+1)/2]^a[l/2];
                    cout << xum <<"\n";
                }
                else{
                    long long xum=a2[u/2]^a2[(l/2)-1];
                    cout << xum <<"\n";
                }
            }
        }
    }
    return 0;
}

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