Submission #1088134

#	Time	Username	Problem	Language	Result	Execution time	Memory
1088134		Nurislam	Knapsack (NOI18_knapsack)	C++14	100 / 100	54 ms	7880 KiB

knapsack

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

#define pb push_back
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define int long long

template <class F, class _S>
bool chmin(F &u, const _S &v){
	bool flag = false;
	if ( u > v ){
		u = v; flag |= true;
	}
	return flag;
}

template <class F, class _S>
bool chmax(F &u, const _S &v){
	bool flag = false;
	if ( u < v ){
		u = v; flag |= true;
	}
	return flag;
}
const int N = 1e6+50, inf = 1e17;
//int mod = 998244353
//int mod = 1000000007;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define rnd(l, r) uniform_int_distribution <int> (l, r)(rng)

struct line{
	int m, c;
	
	line(int _m,int _c) : m(_m), c(_c){
	};
	
	int calc(int x){
		return m * x + c;
	};
	
	double xnt(line & other){
		return (double)(c - other.c)/(m - other.m);
	};
};

void solve(){
	
	int s, n;
	cin >> s >> n;
	vector<array<int,3>> v(n);
	for(auto &i:v)
		cin >> i[0] >> i[1] >> i[2];
	map<int,vector<array<int,2>> > mp;
	for(auto i:v)mp[i[1]].pb({i[0], i[2]});
	
	for(auto &[id, ve]:mp)sort(rall(ve));
	
	vector<int> dp(s+5, 0);
	for(auto [we, ve]:mp){//2000
		
		int mx = s/we;
		int id = 0;
		int cnt = 0;
		int sz = ve.size();//loglog(2000)
		while(id < sz && cnt < mx){
			for(int i = s; i >= we; i--){//2000
				chmax(dp[i], dp[i-we] + ve[id][0]);
			}
			ve[id][1]--;
			if(ve[id][1] == 0)id++;
			cnt++;
		}
	}
	cout << *max_element(all(dp)) << '\n';
	//4000loglog(2000);
	
}

 
signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	int tt = 1;
	//cin >> tt;
	while(tt--){
		solve();
	}
}
 
 
 
 
 
 
 
 
 
 
 
 
 

Compilation message (stderr)

knapsack.cpp: In function 'void solve()':
knapsack.cpp:59:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   59 |  for(auto &[id, ve]:mp)sort(rall(ve));
      |            ^
knapsack.cpp:62:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   62 |  for(auto [we, ve]:mp){//2000
      |           ^

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