Submission #596772

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
596772	2022-07-15 04:05:15	Cookie	XORanges (eJOI19_xoranges)	C++14	100 / 100	177 ms	16116 KiB

xoranges

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#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define vt vector
#define pb push_back
const int mxn = 2e5 + 3;
ll a[mxn];
int n, q;
ll odd[mxn * 4] = {}, even[mxn * 4] = {};
void build(int nd, int l, int r){
    if(l == r){
        if(l % 2 == 0)even[nd] = a[l];
        else odd[nd] = a[l];
        return;
    }
    int mid = (l + r) >> 1;
    build((nd << 1), l, mid); build((nd << 1) + 1, mid + 1, r);
    odd[nd] = odd[(nd << 1)] ^ odd[(nd << 1) + 1]; even[nd] = even[(nd << 1)] ^ even[(nd << 1) + 1];
}
void upd(int nd, int l, int r, int id, ll v){
    if(id > r || id < l)return;
    if(l == r){
        even[nd] = v;
        return;
    }
    int mid = (l + r) >> 1;
    upd((nd << 1), l, mid, id, v); upd((nd << 1) + 1, mid + 1, r, id, v);
     even[nd] = even[(nd << 1)] ^ even[(nd << 1) + 1];
}
void upd2(int nd, int l, int r, int id, ll v){
 
 
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• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 25 / 25
• Subtask 4: 20 / 20
• Subtask 5: 25 / 25