Submission #976820

#	Time	Username	Problem	Language	Result	Execution time	Memory
976820		Isam	XORanges (eJOI19_xoranges)	C++17	55 / 100	1064 ms	3924 KiB

xoranges

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

constexpr int sz = 2e5 + 5;

int n, q, a[sz];

signed main(){
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> n >> q;
	for(register int i = 1; i <= n; ++i){
		cin >> a[i];
	}
	
	
	
	
	int type, l, r;
		
	while(q--){
		cin >> type >> l >> r;
		if(type == 1){
			a[l] = r;
		}else{
			int ans(0);
			for(register int i = l; i <= r; ++i){
				
				int x = ((i - l + 1) & 1) * ((r - i + 1) & 1);
				if(x & 1) ans ^= a[i];
				
			}
			
			cout << ans << '\n';
			
		}
		
	}
	
	
	
	
}

Compilation message (stderr)

xoranges.cpp: In function 'int main()':
xoranges.cpp:11:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   11 |  for(register int i = 1; i <= n; ++i){
      |                   ^
xoranges.cpp:26:21: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   26 |    for(register int i = l; i <= r; ++i){
      |                     ^

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