Submission #1301983

#	Time	Username	Problem	Language	Result	Execution time	Memory
1301983		vaderspader	Knapsack (NOI18_knapsack)	C++20	73 / 100	1092 ms	2832 KiB

knapsack

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

typedef long long ll;
typedef pair<ll, ll> pii;
typedef vector<ll> vi;
typedef vector<vi> matrix;
#define rep(i, a, b) for(ll i = a; i < b; i++)
#define down(i, b, a) for(ll i = b - 1; i >= a; i--)

struct info{
    ll v, w, k;

    info(){}
};

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    ll s, n;
    cin >> s >> n;

    vector<info> a(n);

    rep(i, 0, n){
        cin >> a[i].v >> a[i].w >> a[i].k;
    }

    vi dp(s + 1, 0);
    vi best(s + 1, 0);

    rep(i, 0, n){
        vector<deque<ll>> q(a[i].w, deque<ll>());

        rep(j, 0, s + 1){
            ll curr = j / a[i].w;
            ll mod = j % a[i].w;

            while(!q[mod].empty() && curr - q[mod].front() > a[i].k){
                q[mod].pop_front();
            }

            while(!q[mod].empty() && dp[q[mod].back() * a[i].w + mod] + (curr - q[mod].back()) * a[i].v <= dp[j]){
                q[mod].pop_back();
            }

            q[mod].push_back(curr);

            ll f = q[mod].front();

            best[j] = (curr - f) * a[i].v + dp[f * a[i].w + mod];
        }

        rep(j, 0, s + 1){
            dp[j] = max(dp[j], best[j]);
        }
    }

    cout << dp.back() << endl;
}

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