Submission #1257628

#	Time	Username	Problem	Language	Result	Execution time	Memory
1257628		Canuc80k	Souvenirs (IOI25_souvenirs)	C++20	0 / 100	1 ms	416 KiB

souvenirs

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;

std::pair<std::vector<int>, long long> transaction(long long M);

ll res[201], cnt[201], tmp[201];

void buy_souvenirs(int n, long long p) {
    memset(res, 0x3f, sizeof res);
    res[0] = p;

    for (int i = 1; i < n; i ++) {
        res[i] = min({res[i], 3 * res[i - 1] / 4});
        if (i != 1) res[i] = min(res[i], (ll)ceill(res[i - 2] / (ld)2));

        for (int j = cnt[i] + 1; j <= i; j ++) {
            tmp[i] = res[i - 1] / 2; 
            for (int k = i + 1; k < n; k ++)
                tmp[k] = tmp[k - 1] / 2;
            
            tmp[n - 1] = max(tmp[n - 1], 1ll);
            tmp[n - 2] = max(tmp[n - 2], 2ll);
            for (int k = n - 3; k >= i; k --)
                tmp[i] = max(tmp[i], tmp[i + 1] + tmp[i + 2]);

            // cout << "???: " << i << ' ' << res[i] << endl;
            auto [v, x] = transaction(res[i]);
            // cout << "Buy: " << res[i] << endl;
            for (int k = 0; k < v.size(); k ++) {
                cnt[v[k]] ++;
                if (k != 0) res[i] -= tmp[v[k]];
            }
            res[i] -= x;
            // cout << "Res: " << res[i] << endl;
            // for (auto x: v) cout << x << ' '; cout << endl;
            // cout << "Rem: " << x << endl;
            // cout << "Tmp: " << endl;
            // for (int k = i; k < n; k ++) cout << i << ' ' << tmp[k] << endl;
        }
    }

    // for (int i = 0; i < n; i ++) cout << res[i] << ' '; cout << endl;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 4
• Subtask 2: 0 / 3
• Subtask 3: 0 / 14
• Subtask 4: 0 / 18
• Subtask 5: 0 / 28
• Subtask 6: 0 / 33