Submission #1265801

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265801		nanaseyuzuki	Knapsack (NOI18_knapsack)	C++20	0 / 100	1 ms	836 KiB

knapsack

#include <bits/stdc++.h>
/*
    --> Author: Kazuki_Hoshino__8703 <--
    I love Nanasaki Ai ☆*: .。. o(≒＿≒)o .。.:☆
*/
#define fi first
#define se second
#define pii pair<int, int>
#define int long long
using namespace std;

const int mn = 1e4 + 5, bm = (1 << 20) + 1;
const int mod = 1e9 + 7, base = 31, inf = 1e9;

int n, m, w[mn], v[mn], a[mn];
vector <pii> adj[mn];
vector <int> val[mn];
int dp[mn], tmp[mn];

void solve(){
    cin >> n >> m;
    int max_val = 0;
    for(int i = 1; i <= n; i++){
        cin >> a[i] >> w[i] >> v[i];
        adj[w[i]].push_back({v[i], a[i]});
        max_val = max(w[i], max_val);
    }
    // cerr << "ok\n";
    for(int i = 1; i <= max_val; i++){
        if(adj[i].empty()) continue;
        sort(adj[i].begin(), adj[i].end());
        int num = 0, cur = 0;
        bool ok = true;
        val[i].push_back(0);
        while(!adj[i].empty() && ok){
            int sl = adj[i].back().se;
            int gia = adj[i].back().fi;
            adj[i].pop_back();
            for(int x = 1; x <= sl; x++){
                num ++;
                cur += gia;
                val[i].push_back(cur);
                if(num == m / i){
                    ok = false;
                    break;
                }
            }
        }
    }
    // cerr << "ok\n";
    for(int i = 1; i <= max_val; i++){
        if(val[i].size() <= 1) continue;
        for(int j = 1; j <= m; j++){
            tmp[j] = dp[j];
        }
        for(int j = val[i].size() - 1; j >= 1; j--){
            int kl = i * j;
            int gia = val[i][j];
            for(int ii = kl; ii <= m; ii++){
                tmp[ii] = max(tmp[ii], dp[ii - kl] + gia);
            }
        }
        for(int j = 1; j <= m; j++){
            dp[j] = tmp[j];
        }
    }
    // cerr << "ok\n";
    int res = 0;
    for(int i = 1; i <= m; i++){
        res = max(res, dp[i]);
    }
    cout << res;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int t = 1;
    // cin >> t;
    while(t --){
        solve();
    }
}

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