Submission #525506

#	Time	Username	Problem	Language	Result	Execution time	Memory
525506		ammar2000	XORanges (eJOI19_xoranges)	C++17	55 / 100	1090 ms	2028 KiB

xoranges

#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define F first
#define S second
#define coy cout<<"YES\n"
#define con cout<<"NO\n"
#define co1 cout<<"-1\n"
#define sc(x) scanf("%lld",&x)
#define all(x) x.begin(),x.end()
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
const int SI=3e5+7;
ll INF=8e18+7;
int dx[] = {1 , -1 , 0 , 0};
int dy[] = {0 , 0 , 1 , -1};
int MOD=1e9+7;
ll n,q,a[SI];
int main()
{
   fast
   cin>>n>>q;
   for (int i=1;i<=n;i++)
    cin>>a[i];
   while (q--)
   {
       ll f,l,r;
       cin>>f>>l>>r;
       if (f==1)
        a[l]=r;
       else
       {
           ll xo=0;
        for (int i=l;i<=r;i++)
            if ((i-r+1)*(l-i+1)%2)
               xo^=a[i];
        cout << xo<<"\n";
       }
   }
    // use scanf not cin
   return 0;
}

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