Submission #719610

#	Time	Username	Problem	Language	Result	Execution time	Memory
719610		JANCARAPAN	Knapsack (NOI18_knapsack)	C++17	29 / 100	2 ms	340 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define ll long long 
#define fi first
#define se second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define sz(a) (long long) a.size()
#define endl '\n'
 
#define dbg(a) cerr << #a << " = " << a << endl;
#define print(a) for (auto x : a) cerr << x << " "; cerr << endl;
 
const long long INF = 1e18, MOD = 1e9 + 7;
 
void solve(){
  int s, n;
  cin >> s >> n;
  vector<int> v(n), w(n), k(n);
  for (int i = 0; i < n; i++) {
    cin >> v[i] >> w[i] >> k[i];
  }
  vector<ll> dp(s + 1);
  for (int i = 0; i < n; i++) {
    vector<ll> already(s + 1), ndp(s + 1);
    for (int j = 0; j <= s; j++) {
      ndp[j] = dp[j];
      if (j < w[i]) continue;
      if (dp[j - w[i]] + v[i] > dp[j]) {
        ndp[j] = dp[j - w[i]] + v[i];
        already[j] = 1;
      }
      if (ndp[j - w[i]] + v[i] > ndp[j] && already[j - w[i]] + 1 <= k[i]) {
        ndp[j] = ndp[j - w[i]] + v[i];
        already[j] = already[j - w[i]] + 1;
      }
      if (ndp[j - 1] > ndp[j]) {
        ndp[j] = ndp[j - 1];
        already[j] = already[j - 1];
      }
    }
    swap(dp, ndp);
  }
  
  cout << dp[s] << endl;
}
 
signed main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int tt = 1;
  //cin >> tt;
  while (tt--) {
    solve();
  }
  return 0;
}

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