Submission #945564

#	Time	Username	Problem	Language	Result	Execution time	Memory
945564		nasir_bashirov	Knapsack (NOI18_knapsack)	C++17	29 / 100	2 ms	504 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]));
    }
    for(int i = 1; i <= m; i++){
        for(int j = m; j >= 1; j--){
            int cur = 0, tot = 0;
            for(pii z : w[i]){
                if(z.second * i + cur <= j) cur += z.second * i, tot += z.first * z.second;
                else    tot += ((j - cur) / i) * z.first, cur += ((j - cur) / i) * i;
                dp[j] = max(dp[j], dp[j - cur] + tot);
            }
        }
    }
    cout << dp[m];
}

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