Submission #780250

#	Time	Username	Problem	Language	Result	Execution time	Memory
780250		devariaota	Knapsack (NOI18_knapsack)	C++17	0 / 100	1 ms	212 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
const ll MAXN = 1e5 + 5;
const ll MAXT = 2e3 + 5;

ll n, t, li, ei, ki, dp[MAXT];

void update2(ll a, ll b, ll low, ll high) {
  // {Spread, Energi}
  for (int i = low; i <= high; ++i)
  {
    if (i < b) {
      continue ;
    }
    dp[i] = max(dp[i], dp[i-b] + a);
  }
}

void update(ll a, ll b, ll k) {
  // {Spread, Energi, Jumlah}
  ll low = -1, high = t;

  while(low != 0) {
    low = high - (k * ei);
    update2(a, b, low, high);
    high = low - 1;
    low = max(high - (k * ei), 0ll);
  }
}

int main(){
  ios_base::sync_with_stdio(false); cin.tie(0);
  cin >> t >> n;

  for (int i = 0; i < n; ++i)
  {
    cin >> li >> ei >> ki;

    ki = min(ki, t / ei);
    update(li, ei, ki);
  }

  cout << dp[t] << "\n";
  return 0;
}

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