Submission #260066

#	Time	Username	Problem	Language	Result	Execution time	Memory
260066		mosiashvililuka	XORanges (eJOI19_xoranges)	C++14	100 / 100	585 ms	7964 KiB

xoranges

#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,e,i,j,ii,jj,zx,xc,fen[100009][2],tes,t,tp,f[200009];
void upd(int q, int w, int rr){
    while(q<=100000){
        fen[q][w]^=rr;
        q=q+(q&(-q));
    }
}
int read(int q, int w){
    int jm=0;
    while(q>=1){
        jm^=fen[q][w];
        q=q-(q&(-q));
    }
    return jm;
}
int main(){
    ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    cin>>a>>tes;
    for(i=1; i<=a; i++){
        cin>>f[i];
        upd(i/2+i%2,i%2,f[i]);
    }
    for(t=1; t<=tes; t++){
        cin>>tp>>c>>d;
        if(tp==1){
            upd(c/2+c%2,c%2,(f[c]^d));
            f[c]=d;
        }else{
            if((d-c+1)%2==0){
                cout<<0<<endl;
                continue;
            }
            e=c%2;
            c-=2;
            cout<<(read(d/2+d%2,e)^read(c/2+c%2,e))<<endl;
        }
    }
    return 0;
}

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