Submission #767205

#	Time	Username	Problem	Language	Result	Execution time	Memory
767205		synthesis	Knapsack (NOI18_knapsack)	C++17	73 / 100	132 ms	262144 KiB

knapsack

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second
#define pii pair<int, int>
#define pb push_back
#define vi vector<int>
#define all(x) x.begin(), x.end()

using namespace std;
using namespace __gnu_pbds;
using ll = long long int;
using ull = unsigned long long int;

constexpr ll mod = 1e9 + 7;
constexpr ll INF = LONG_LONG_MAX;

int dx[4] = {-1, 0, 1, 0}, dy[4] = {0, 1, 0, -1};
string moves = "URDL";

int main()
{
    //tree<ll, null_type,less<ll>, rb_tree_tag,tree_order_statistics_node_update> q;
    /*freopen("problemname.in", "r", stdin);
    freopen("problemname.out", "w", stdout);*/
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int x, n;
    cin >> x >> n;
    int a[n], b[n], c[n];
    //value, weight, quantity
    for(int i = 0;i<n;++i) {
        cin >> a[i] >> b[i] >> c[i];
    }
    int dp[n + 1][x + 1], ans = 0;
    memset(dp, 0, sizeof dp);
    for(int i = 1;i<=n;++i) {
        for(int j = 0;j<=x;++j) {
            dp[i][j] = max(dp[i][j], dp[i - 1][j]);
            int cnt = 1;
            while(j - cnt*b[i - 1] >= 0 && cnt <= c[i - 1]) {
                dp[i][j] = max(dp[i][j], dp[i - 1][j - cnt*b[i - 1]] + cnt*a[i - 1]);
                ++cnt;
            }
            ans = max(ans, dp[i][j]);
        }
    }
    cout << ans << endl;
    return 0;
}

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