Submission #493281

#	Time	Username	Problem	Language	Result	Execution time	Memory
493281		Khizri	Intergalactic ship (IZhO19_xorsum)	C++17	9 / 100	2090 ms	2244 KiB

xorsum

#include <bits/stdc++.h>
using namespace std;
//------------------------------DEFINE------------------------------
//******************************************************************
#define IOS ios_base::sync_with_stdio(false); cin.tie(0),cout.tie(0)
#define ll long long
#define pb push_back		 
#define F first																 
#define S second 															 
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
#define endl "\n"
//******************************************************************
//----------------------------FUNCTION------------------------------
//******************************************************************
ll gcd(ll a,ll b){
	if(a>b) swap(a,b);
	if(a==0) return a+b;
	return gcd(b%a,a);
}
ll lcm(ll a,ll b){
	return a/gcd(a,b)*b;
}
bool is_prime(ll n){
	ll k=sqrt(n);
	if(n==2) return true;
	if(n<2||n%2==0||k*k==n) return false;
	for(int i=3;i<=k;i+=2){
		if(n%i==0){
			return false;
		}
	}
	return true;
}
//*****************************************************************
//--------------------------MAIN-CODE------------------------------
const int mxn=2e5+5;
int t=1,n,m,arr[mxn],l[mxn],r[mxn],x[mxn],ans;
void funk(vector<int>&vt){
	for(int v:vt){
		for(int i=l[v];i<=r[v];i++){
			arr[i]^=x[v];
		}
	}
	for(int i=1;i<=n;i++){
		int sum=0;
		for(int j=i;j<=n;j++){
			sum+=arr[j];
			ans=(ans+((sum*sum)%MOD))%MOD;
		}
	}
	for(int v:vt){
		for(int i=l[v];i<=r[v];i++){
			arr[i]^=x[v];
		}
	}
}
void solve(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>arr[i];
	}
	cin>>m;
	for(int i=1;i<=m;i++){
		cin>>l[i]>>r[i]>>x[i];
	}
	for(int mask=0;mask<(1<<m);mask++){
		vector<int>vt;
		for(int i=0;i<m;i++){
			if(mask&(1<<i)){
				vt.pb(i+1);
			}
		}
		funk(vt);
	}
	cout<<ans<<endl;
}
int main(){
	//IOS;
	//cin>>t;
	while(t--){
		solve();
	}
	return 0;
}

• 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