Submission #690576

#	Time	Username	Problem	Language	Result	Execution time	Memory
690576		iskhakkutbilim	Intergalactic ship (IZhO19_xorsum)	C++14	17 / 100	2077 ms	3424 KiB

xorsum

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

#define int long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int N = 1000;
const int M = 1e9+7;

struct upd{
	int l, r, x;
};
vector<upd> query;
int n, q, a[N];
int count_K(){
	int sum = 0;
	for(int i = 0;i < n; i++){
		int s = 0;
		for(int j = i;j < n; j++){
			s+= a[j];
			sum = (sum + s*s)%M;
		}
	}
	return sum;
}

main(){
   ios::sync_with_stdio(0);
   cin.tie(0); cout.tie(0);
	cin >> n;
	for(int i = 0;i < n; i++){
		cin >> a[i];
	}
	cin >> q;
	query.resize(q);
	for(int i = 0;i < q; i++){
		cin >> query[i].l >> query[i].r >> query[i].x;
		query[i].l--, query[i].r--;
	}
	int answer = 0;
	for(int mask = 0; mask < (1<<q); mask++){
		for(int i = 0;i < q; i++){
			if(mask & (1<<i)){
				for(int j = query[i].l; j <= query[i].r; j++){
					a[j] = (a[j] ^ query[i].x);
				}
			}
		}
		answer = (answer + count_K())%M;
		for(int i = 0;i < q; i++){
			if(mask & (1<<i)){
				for(int j = query[i].l; j <= query[i].r; j++){
					a[j] = (a[j] ^ query[i].x);
				}
			}
		}
	}
	cout << answer;
	return 0;
}

Compilation message (stderr)

xorsum.cpp:28:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   28 | main(){
      | ^~~~

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