Submission #945581

#	Time	Username	Problem	Language	Result	Execution time	Memory
945581		nasir_bashirov	Knapsack (NOI18_knapsack)	C++11	100 / 100	45 ms	4952 KiB

knapsack

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
 
#include <bits/stdc++.h>
using namespace std;
 
#define db long double
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define vll vector<pll>
#define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio\
    ios_base::sync_with_stdio(0);\
    cin.tie(0);\
    cout.tie(0)\
 
#define int long long
 
int dp[2005], n, m, x, y, z;
vii w[2005];
 
signed main(){
    fastio;
    cin >> m >> n;
    for(int i = 1; i <= n; i++){
        cin >> x >> y >> z;
        w[y].push_back({x, z});
    }
    for(int i = 1; i <= m; i++){
        sort(all(w[i]));
        reverse(all(w[i]));
        int s = 0;
        for(pii j : w[i])   s += j.second;
        while(w[i].size() and s - w[i].back().second > m / i)  s -= w[i].back().second, w[i].pop_back();
        if(s > m / i)   w[i][w[i].size() - 1].second -= s - m / i;
    }
    for(int i = 1; i <= m; i++){
        for(pii j : w[i]){
            for(int z = 1; z <= j.second; z++){
                for(int k = m; k >= i; k--){
                    dp[k] = max(dp[k], dp[k - i] + j.first);
                }
            }
        }
    }
    cout << dp[m];
}

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