Submission #469662

#	Time	Username	Problem	Language	Result	Execution time	Memory
469662		keta_tsimakuridze	Intergalactic ship (IZhO19_xorsum)	C++14	9 / 100	2082 ms	3584 KiB

xorsum

#include<bits/stdc++.h>
#define f first
#define s second
#define int long long
#define pii pair<int,int>
using namespace std;
const int N = 2e5 + 5, mod = 1e9 + 7; // !
int t,a[N],x[N],n,q;
vector<pair<pii,int > > all;
main(){
	cin >> n;
	for(int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	cin >> q;
	for(int i = 1; i <= q; i++) {
		int l,r,x;
		cin >> l >> r >> x;
		all.push_back({{l,r},x});
	}
	int ans = 0;
	for(int mask = 0; mask <(1 << q); mask++){
		for(int i = 1; i <= n; i++) x[i] = a[i];
		for(int i = 0; i < q; i++) {
			if((1 << i) & mask) {
				for(int j = all[i].f.f; j <= all[i].f.s; j++) x[j] ^= all[i].s;
			}
		}
		for(int i = 1; i <= n;i ++) {
			int sum = 0;
			for(int j = i; j <= n; j++){
				sum += x[j];
				ans += sum * sum;
				ans %= mod;
			}
		}
	}
	cout << ans;
 }

Compilation message (stderr)

xorsum.cpp:10:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   10 | main(){
      | ^~~~

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 0 / 6
• Subtask 4: 0 / 9
• Subtask 5: 0 / 8
• Subtask 6: 0 / 11
• Subtask 7: 0 / 19
• Subtask 8: 0 / 30
• Subtask 9: 0 / 8