Submission #574262

#	Time	Username	Problem	Language	Result	Execution time	Memory
574262		8e7	Uplifting Excursion (BOI22_vault)	C++17	0 / 100	835 ms	17872 KiB

vault

//Challenge: Accepted
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r) {
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 1100005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
const int inf = 1<<30;
int dp[2][maxn];
int main() {
	io
	int m;
	ll L;
	cin >> m >> L;
	vector<ll> a(2*m+1);	
	ll mins = 0;
	for (int i = 0;i < 2*m+1;i++) {
		cin >> a[i];
		if (i < m) mins += a[i] * (i - m);
	}
	for (int i = 0;i < maxn;i++) dp[0][i] = dp[1][i] = -inf;	

	dp[0][-mins] = 0;
	dp[1][-mins] = 0;
	for (int i = 0;i < 2*m+1;i++) {
		ll cnt = 1;		
		vector<int> num;
		while (a[i] >= cnt) {
			num.push_back(cnt);
			a[i] -= cnt;
			cnt <<= 1;
		}
		if (a[i] > 0) num.push_back(a[i]);
		for (int p:num) {
			for (int j = 0;j < maxn;j++) {
				int val = j + p * (i-m);
				if (val >= 0 && val < maxn) dp[1][val] = max(dp[1][val], dp[0][j] + p);
			}
			for (int j = 0;j < maxn;j++) dp[0][j] = dp[1][j];
		}
	}
	if (dp[0][L - mins] < 0) cout << "impossible\n";
	else cout << dp[0][L - mins] << "\n";
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3-1: 0 / 10
• Subtask 3-2: 0 / 10
• Subtask 4-1: 0 / 10
• Subtask 4-2: 0 / 10
• Subtask 5-1: 0 / 10
• Subtask 5-2: 0 / 10
• Subtask 6-1: 0 / 10
• Subtask 6-2: 0 / 10