Submission #1116297

#	Time	Username	Problem	Language	Result	Execution time	Memory
1116297		TAFH	Knapsack (NOI18_knapsack)	C++17	29 / 100	1 ms	508 KiB

knapsack

#include <bits/stdc++.h>

#define forn(i, n) for (int i = 0; i < n; i++)
#define ull unsigned long long
#define ll long long
#define SPEED                         \
    ios_base::sync_with_stdio(false); \
    cin.tie(0);                       \
    cout.tie(0)

using namespace std;
const int N = 1000 + 13;
const int maxa = 1e6 + 13;
const ll mod = 998244353;
using tp = tuple<ll, ll, ll>;

void prestart() {}

ll dp[maxa];
void start()
{
    int s, n;
    cin >> s >> n;

    vector<tp> a;

    forn(i, n) {
        ll v, w, k;
        cin >> v;
        cin >> w;
        cin >> k;
        a.push_back({v, w, k});
    }

    sort(a.begin(), a.end(), [](tp a, tp b) {
        ll f = get<0>(a) * get<1>(b);
        ll m = get<0>(b) * get<1>(a);
        if (f == m) return get<1>(b) > get<1>(a);
        return get<0>(a) * get<1>(b) > get<0>(b) * get<1>(a);
    });

    // cout << "\n";
    // for(auto i : a) {
    //     cout << get<0>(i) << " " << get<1>(i) << " " << get<2>(i) << "\n";
    // }

    for (int i = 0; i < n; i++)
    {
        ll v = get<0>(a[i]);
        ll w = get<1>(a[i]);
        ll k = get<2>(a[i]);
        for (int j = s; j >= 0; j--)
        {
            ll l = min(k, j / w);
            dp[j] = max(dp[j], dp[j - w * l] + v * l);
        }
    }

    cout << dp[s] << "\n";
}

signed main()
{
    SPEED;
    int t = 1;
    prestart();
    // cin >> t;
    while (t--)
    {
        start();
    }
}

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