Submission #631672

#	Time	Username	Problem	Language	Result	Execution time	Memory
631672		smartmonky	XORanges (eJOI19_xoranges)	C++14	0 / 100	1074 ms	1524 KiB

xoranges

#include <iostream>
#include <algorithm>
#include <vector>
#include <math.h>
#include <set>
#include <map>

#define ll long long
#define ff first
#define ss second
#define pb push_back
#define all(x) (x).begin(),(x).end()

using namespace std;

main(){
    int n,q;
    cin >> n>>q;
    vector <int> v(n+1);
    for(int i=1;i<=n;i++)
		cin >>v[i];
	while(q--){
		int type,x,y;
		cin >>type >>x >>y;
		if(type==1)
			v[x]=y;
		else{
			if(y==x)
				cout<<v[x] <<endl;
			else{
				int res=0;
				if(((y-x+1)/2)%2==0){
					for(int i=x+1;i<=y-1;i++)
					res^=v[i];
				}else
					res=(v[x]^v[y]);
				cout <<res <<endl;
			}
		}
	}
}

Compilation message (stderr)

xoranges.cpp:16:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   16 | main(){
      | ^~~~

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