Submission #792072

#	Time	Username	Problem	Language	Result	Execution time	Memory
792072		ToniB	Uplifting Excursion (BOI22_vault)	C++17	5 / 100	5061 ms	369612 KiB

vault

#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1005;
const int K = MAXN * MAXN / 4;

int m, a[MAXN];
int dp[MAXN][MAXN * MAXN / 2];
long long L;
int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);

	cin >> m >> L;
	for(int i = 0; i < 2 * m + 1; ++i) cin >> a[i];
	for(int i = 0; i < 2 * m + 1; ++i){
		// dp[i][j] = max{dp[i - 1][j - x * (i - m)] + x}
		for(int j = 0; j < MAXN * MAXN / 2; ++j){
			dp[i][j] = -1e9;
			for(int x = 0; x <= a[i]; ++x){
				if(j - x * (i - m) >= 0 && j - x * (i - m) < MAXN * MAXN / 2){
					if(i) dp[i][j] = max(dp[i][j], dp[i - 1][j - x * (i - m)] + x);
					else if(j - x * (i - m) == K) dp[i][j] = max(dp[i][j], x);
				}
			}
		}
	}
	if(L + K < 0 || L + K >= MAXN * MAXN / 2) cout << "impossible\n";
	else if(dp[2 * m][L + K] < 0) cout << "impossible\n";
	else cout << dp[2 * m][L + K];
	return 0;
}

• Subtask 1: 5 / 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