Submission #423694

#	Time	Username	Problem	Language	Result	Execution time	Memory
423694		abdzag	Kitchen (BOI19_kitchen)	C++17	100 / 100	49 ms	1120 KiB

kitchen

#include<bits/stdc++.h>
#include<unordered_map>
#define rep(i,a,b) for(int i=int(a);i<int(b);i++)
#define rrep(i,a,b) for(int i=int(a);i>int(b);i--)
#define trav(a,v) for(auto& a: v)
#define sz(v) v.size()
#define all(v) v.begin(),v.end()
#define vi vector<int>

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
const long long inf = 1e15;

using namespace std;
int main() {
	cin.sync_with_stdio(false);
	ll n, m, k;
	cin >> n >> m >> k;
	vector<ll> v(n);
	vector<ll> v2(m);
	rep(i, 0, n) {
		cin >> v[i];
		if (v[i] < k) {
			cout << "Impossible" << endl;
			return 0;
		}
	}
	rep(i, 0, m)cin >> v2[i];
	ll sum = 0;
	rep(i, 0, n)sum += v[i];
	sort(all(v2), greater<>());
	vector <ll>dp0(1e5,-inf);
	dp0[0]= 0;;
	ll ans = inf;
	ll sumv2 = 0;
	ll sumk = 0;
	rep(i, 0, m) {
		rrep(j, sumv2,-1) {
			dp0[j + v2[i]] = max(dp0[j + v2[i]], dp0[j] + min(n, v2[i]));
		}
		sumv2 += v2[i];
		sumk++;
	}
	rep(i, sum, sumv2+1) {
		if (dp0[i] >= n * k) {
			ans = i;
			break;
		}
	}
	if (ans == inf)cout << "Impossible" << endl;
	else cout << ans - sum << endl;
	return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 22 / 22
• Subtask 3: 20 / 20
• Subtask 4: 21 / 21
• Subtask 5: 28 / 28