Submission #1109323

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109323		greenbinjack	Knapsack (NOI18_knapsack)	C++17	17 / 100	20 ms	15856 KiB

knapsack

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

#define all(v) v.begin(), v.end()

using LL = long long;

int main() {
  cin.tie(nullptr)->ios_base::sync_with_stdio(false); 

  LL s, n;
  cin >> s >> n;
  vector <LL> weight, val;
  for (LL i = 0; i < n; i++) {
    LL v, w, k;
    cin >> v >> w >> k;
    for (LL j = 1; j * w <= s and j <= k; j++) {
      weight.push_back (j * w); 
      val.push_back (v);
    }
  }

  n = weight.size ();
  vector < vector <LL> > dp (n + 1, vector <LL> (s + 1));
  vector < vector <bool> > isAvail (n + 1, vector <bool> (s + 1));
  isAvail[0][0] = 1;
  for (LL i = 1; i <= n; i++) {
    for (LL j = s; j >= 0; j--) {
      dp[i][j] = dp[i - 1][j];
      isAvail[i][j] = isAvail[i - 1][j];
      if (j - weight[i - 1] >= 0 and isAvail[i - 1][j - weight[i - 1]]) {
        isAvail[i][j] = 1;
        dp[i][j] = max (dp[i][j], dp[i - 1][j - weight[i - 1]] + val[i - 1]);
      }
    }
  }
 
  cout << *max_element (all (dp[n])) << '\n';

  return 0;
}

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