제출 #467599

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
467599		ignus	XORanges (eJOI19_xoranges)	C++14	0 / 100	639 ms	9292 KiB

xoranges

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

int main(int argc, char** argv) {
	int N, Q;
	cin >> N >> Q;
	int ts = 2;
	while(ts/2<N)ts*=2;
	ts/=2;
	vector<int> a1(ts);
	vector<int> a(ts);
	for(int i = 0; i < N; i++){
		if(i%2) cin >> a1[i/2+ts/2];
		else cin >> a[i/2+ts/2];
	}
	for(int i = ts/2-1; i > 0; i--) a[i]=a[i*2]^a[i*2+1];
	for(int i = ts/2-1; i > 0; i--) a1[i]=a1[i*2]^a1[i*2+1];
	
	for(int i = 0; i < Q; i++){
		int optype;
		cin >> optype;
		if(optype == 1){
			int j, t;
			cin >> j >> t;
			j--;
			j/=2;
			j+=ts/2;
			if(j%2){
			a1[j]=t;
			j/=2;
			while(j!=0){
				a1[j]=a1[j*2]^a1[j*2+1];
				j/=2;
			}
			}else{
			a[j]=t;
			j/=2;
			while(j!=0){
				a[j]=a[j*2]^a[j*2+1];
				j/=2;
			}	
			}
		}else{
			int l, r;
			cin >> l >> r;
			if((l-r)%2==1) {
				cout << 0;
				continue;
			}
			l--; r--;
			l/=2; r/=2;
			l+=ts/2; r+=ts/2;
			if(!(l%2)){
			if(l==r) cout <<a[l];
			int fin = a[l]^a[r];
			while(l/2!=r/2){
				if(!(l%2)) fin^=a[l+1];
				if(r%2) fin^=a[r-1];
				l/=2; r/=2;
			}
			cout << fin << '\n';
			}else{
			if(l==r) cout <<a1[l];
			int fin = a1[l]^a1[r];
			while(l/2!=r/2){
				if(!(l%2)) fin^=a1[l+1];
				if(r%2) fin^=a1[r-1];
				l/=2; r/=2;
			}
			cout << fin << '\n';
			}
		}
	} 
	return 0;
}

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