Submission #1274595

#	Time	Username	Problem	Language	Result	Execution time	Memory
1274595		KluydQ	Knapsack (NOI18_knapsack)	C++20	100 / 100	41 ms	3012 KiB

knapsack

#include <bits/stdc++.h>

#define respagold ios_base::sync_with_stdio(0), cin.tie(0);
#define int long long
#define ll long long
#define int2 __int128_t
#define FOR( i, x, n, d ) for( int i = x; i <= n; i += d )
#define FORR( i, x, n, d ) for( int i = x; i >= n; i -= d )
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x.size())
#define pb push_back
#define ins insert
#define lb lower_bound
#define ub upper_bound
#define pii pair <int, int>

using namespace std;
 
const int N = 2e3 + 12;
const int mod = 1e9 + 7;
const ll inf = 2e18;

int n, m, x, y, z, dp[N];
vector <pii> g[N];

void solve()
{
	cin >> m >> n;
	
	FOR( i, 1, n, 1 )
	{
		cin >> x >> y >> z;
		g[y].pb({x, z});
	}
	FOR( we, 1, m, 1 )
	{
		sort( all(g[we]) ); x = 0;
		reverse( all(g[we]) );
		
		for( auto i : g[we] )
		{
			while( i.S > 0 && x < m / we )
			{
				x ++, i.S --;
				FORR( j, m, we, 1 ) dp[j] = max(dp[j], dp[j - we] + i.F);
			}
		}
	}
	int ans = 0;
	FOR( i, 1, m, 1 ) ans = max(ans, dp[i]);
	cout << ans << '\n';
}
signed main()
{
	respagold;
	
	int test = 1;
	if( !test ) cin >> test;
	while( test -- ) solve();
}

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