Submission #1213297

#	Time	Username	Problem	Language	Result	Execution time	Memory
1213297		rhm_gan	Knapsack (NOI18_knapsack)	C++20	0 / 100	26 ms	324 KiB

knapsack

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

#ifdef LOCAL
#include "debug.h"
#else
#define dbg(...) 42
#endif

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n, x;
    cin >> n >> x;

    vector<int> a(n);
    for (int i = 0; i < n; i++) {
    	cin >> a[i];
    }

    auto lis = [&]() {
        set<int> s;
        for (auto x : a) {
            auto it = s.lower_bound(x);
            if (it != s.end()) {
                s.erase(it);
            }
            s.insert(x);
        }
        return (int)s.size();
    };

    int res = lis();
    if (x == 0) {
        cout << res << '\n';
        return 0;
    }

    for (int i = 0; i < n; i++) {
        a[i] -= x;
        res = max(res, lis());
    }

    cout << res << '\n';

    return 0;
}

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