Submission #661037

#	Time	Username	Problem	Language	Result	Execution time	Memory
661037		GusterGoose27	Uplifting Excursion (BOI22_vault)	C++11	5 / 100	5073 ms	2300 KiB

vault

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> pii;

typedef long long ll;

const int MAXN = 100;
const int MXVAL = 505000;
int n;
ll target;
int cnt[2*MAXN+1];
int mx_use[MXVAL+1];

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	cin >> n >> target;
	if (abs(target) > MXVAL) {
		cout << "impossible\n";
		return 0;
	}
	fill(mx_use, mx_use+MXVAL+1, -1);
	mx_use[0] = 0;
	for (int i = 0; i <= 2*n; i++) cin >> cnt[i];
	if (target < 0) {
		target *= -1;
		for (int i = 0; i < n; i++) swap(cnt[i], cnt[2*n-i]);
	}
	for (int j = 1; j <= n; j++) {
		for (int i = MXVAL; i >= j; i--) {
			for (int p = 1; (p <= cnt[n+j]) && (i-p*j >= 0); p++) 
				if (mx_use[i-p*j] >= 0) mx_use[i] = max(mx_use[i], mx_use[i-p*j]+p);
		}
	}
	for (int j = 1; j <= n; j++) {
		for (int i = target; i <= MXVAL-j; i++) {
			for (int p = 1; (p <= cnt[n-j]) && (i+p*j <= MXVAL); p++)
				if (mx_use[i+p*j] >= 0) mx_use[i] = max(mx_use[i], mx_use[i+p*j]+p);
		}
	}
	if (mx_use[target] == -1) {
		cout << "impossible\n";
		return 0;
	}
	cout << (mx_use[target]+cnt[n]) << "\n";
}

• 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