Submission #1004937

#	Time	Username	Problem	Language	Result	Execution time	Memory
1004937		emptypringlescan	Flooding Wall (BOI24_wall)	C++17	8 / 100	97 ms	600 KiB

Main

#include <bits/stdc++.h>
using namespace std;
const long long mod=1000000007;
long long twok[500005];
int32_t main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin >> n;
	pair<long long,long long> arr[n];
	for(int i=0; i<n; i++) cin >> arr[i].first;
	for(int i=0; i<n; i++) cin >> arr[i].second;
	for(int i=0; i<n; i++){
		if(arr[i].first>arr[i].second)swap(arr[i].first,arr[i].second);
	}
	long long ans=0;
	for(int bm=0; bm<(1<<n); bm++){
		long long brr[n];
		for(int i=0; i<n; i++){
			if(bm&(1<<i)) brr[i]=arr[i].first;
			else brr[i]=arr[i].second;
		}
		pair<long long,long long> mx[n];
		mx[0].first=brr[0];
		mx[n-1].second=brr[n-1];
		for(int i=1; i<n; i++) mx[i].first=max(mx[i-1].first,brr[i]);
		for(int i=n-2; i>=0; i--) mx[i].second=max(mx[i+1].second,brr[i]);
		for(int i=0; i<n; i++) ans+=min(mx[i].first,mx[i].second)-brr[i];
	}
	cout << ans%mod;
}

• Subtask 1: 8 / 8
• Subtask 2: 0 / 17
• Subtask 3: 0 / 19
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 30