Submission #944938

#	Time	Username	Problem	Language	Result	Execution time	Memory
944938		vako_p	Knapsack (NOI18_knapsack)	C++14	100 / 100	67 ms	8816 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define ll long long

const int mxN = 2e5 + 5;
ll n,s,v1,w1,k1,dp[mxN];
multiset<pair<ll,ll>> st[2005];
vector<ll> v,w,k;
pair<ll,ll> x;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin >> s >> n;
	for(int i = 0; i < n; i++){
		cin >> v1 >> w1 >> k1;
		st[w1].insert({v1, k1});
	}
	ll curr;
	for(int i = 1; i <= s; i++){
		curr = 0;
		auto it = st[i].end(); 
		while(it != st[i].begin() and curr < s / i){
			--it;
			x = *it;
			v.pb(x.first);
			w.pb(i);
			if(curr + x.second <= s / i){	
				k.pb(x.second);
				curr += x.second;
			}
			else{
				k.pb(s / i - curr);
				curr = s / i;
			}
		}
	}
	n = v.size();
	for(int i = 0; i < n; i++){
		for(int j = s; j > 0; j--){
			for(int l = 1; l <= k[i]; l++){
				if(l * w[i] > j) break;
				dp[j] = max(dp[j], dp[j - l * w[i]] + v[i] * l);
			}
		}
	}
	cout << dp[s];
}

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