Submission #654287

#	Time	Username	Problem	Language	Result	Execution time	Memory
654287		thiago_bastos	Knapsack (NOI18_knapsack)	C++17	73 / 100	1083 ms	8404 KiB

knapsack

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("mmx,sse,sse2,sse3")

#include "bits/stdc++.h"

using namespace std;

#define INF 2000000100
#define INFLL 1000000000000000000ll
#define EPS 1e-9
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define pb push_back
#define fi first
#define sc second
 
using i64 = long long;
using u64 = unsigned long long;
using ld = long double;
using ii = pair<int, int>;	

const int N = 2e3 + 100;

int dp[N], lo[N], hi[N];

ii dq[N][N];

void solve() {
	int s, n;

	cin >> s >> n;

	fill(dp, dp + N, -INF);

	dp[0] = 0;

	for(int i = 0; i < n; ++i) {
		int v, w, c;

		cin >> v >> w >> c;

		c = min(c, s / w);

		
		for(int k = 0; k < w; ++k) lo[k] = hi[k] = 0;

		for(int k = 0; k <= s; ++k) {
			int X = dp[k], mod = k % w, j = k / w;
			
			while(lo[mod] < hi[mod] && j - dq[mod][lo[mod]].sc > c) ++lo[mod];

			if(lo[mod] != hi[mod]) dp[k] = max(dp[k], dq[mod][lo[mod]].fi + v * j);

			if(X >= 0) {
				while(lo[mod] < hi[mod] && dq[mod][hi[mod] - 1].fi < X - v * j) --hi[mod];
				dq[mod][hi[mod]++] = {X - v * j, j};
			}
		}
	}

	cout << *max_element(dp, dp + N) << '\n';
}	

int main() {
	ios_base :: sync_with_stdio(false);
	cin.tie(0);
	int t = 1;
 //	cin >> t;
	while(t--) solve();
	return 0;
}

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