Submission #487012

#	Time	Username	Problem	Language	Result	Execution time	Memory
487012		sberens	Knapsack (NOI18_knapsack)	C++17	73 / 100	1064 ms	2756 KiB

knapsack

#include <bits/stdc++.h>

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template <typename K> using hset = gp_hash_table<K, null_type>;
template <typename K, typename V> using hmap = gp_hash_table<K, V>;


using namespace std;

#define all(x) (x).begin(), (x).end()
#define pb push_back
#define eb emplace_back
#define smax(x, y) (x = max(x, y))
#define smin(x, y) (x = min(x, y))

using ll = long long;
using ld = long double;

template <typename T>
using vv = vector<vector<T>>;

using vi = vector<int>;
using ii = array<int, 2>;
using vii = vector<ii>;
using vvi = vv<int>;

using vll = vector<ll>;
using l2 = array<ll, 2>;
using vl2 = vector<l2>;
using vvll = vv<ll>;

template <typename T>
using minq = priority_queue<T, vector<T>, greater<T>>;
template <typename T>
using maxq = priority_queue<T>;

const ll M = 1000000007;

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int s, n;
    cin >> s >> n;
    vector<array<int, 3>> items(n);
    for (int i = 0; i < n; ++i) {
        auto &[vi, wi, ki] = items[i];
        cin >> vi >> wi >> ki;
    }
    vi dp(s + 1 ); // s, k
    for (int i = 0; i < n; ++i) {
        auto[v, w, k] = items[i];
        auto ndp = dp;
        for (int ss = 0; ss <= s; ++ss) { // space left
            for (int kk = 0; kk <= k && w * kk <= ss; ++kk) { // amount used
                smax(ndp[ss], dp[ss - w * kk] + v * kk);
            }
        }
        dp = ndp;
    }
    cout << *max_element(all(dp)) << '\n';

}

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