Submission #584741

#	Time	Username	Problem	Language	Result	Execution time	Memory
584741		AkramElOmrani	Knapsack (NOI18_knapsack)	C++17	12 / 100	2 ms	3412 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ios ios_base::sync_with_stdio(0);cin.tie(0);

template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }
 
void dbg_out() { cerr << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cerr << ' ' << H; dbg_out(T...); }
#define dbg(...) cerr << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
inline int gen(int a, int b) {return (ll)rng() % (b - a + 1) + a;}

#define int ll

signed main()
{
	ios
	int n, s; cin >> s >> n;
	vector<vector<pair<int, int>>> dp(n, vector<pair<int, int>>(s + 1));
	vector<int> v(n), w(n), k(n);
	for(int i = 0; i < n; ++i) {
		cin >> v[i] >> w[i] >> k[i];
	}

	auto max_self = [&](pair<int, int>& a, pair<int, int> b) {
		if(a.first < b.first) {
			a = b;
		}
		if(a.first == b.first && a.second > b.second) {
			a = b;
		}
	};

	int mx = 0;
	for(int i = 0; i < n; ++i) {
		for(int j = 0; j <= s; ++j) {
			if(i) {
				if(dp[i][j].first < dp[i - 1][j].first) {
					dp[i][j] = {dp[i - 1][j].first, 0};
				}
			}
			if(w[i] <= j && dp[i][j - w[i]].second < k[i]) {
				max_self(dp[i][j], 
						{dp[i][j - w[i]].first + v[i], dp[i][j - w[i]].second + 1});
			}
			mx = max(mx, dp[i][j].first);
		}
	}
	cout << mx << '\n';
}

• Subtask 1: 12 / 12
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 24
• Subtask 5: 0 / 27