Submission #1254418

#	Time	Username	Problem	Language	Result	Execution time	Memory
1254418		vpinx	선물 (IOI25_souvenirs)	C++20	39 / 100	12 ms	412 KiB

souvenirs

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

extern pair<vector<int>, long long> transaction(long long m);

void buy_souvenirs(int n, long long p0) {
    if (n == 2) auto [l, r] = transaction(p0 - 1);
    else if (n == 3) {
        auto [l, r] = transaction(p0 - 1);
        if (l.size() == 1) {
            for (int i = 0; i < 2; i++) auto [l2, r2] = transaction(p0 - r - 2);
        }else {
            long long sum = p0 - r - 1;
            auto [l2, r2] = transaction(sum / 2 - ((sum & 1) ^ 1));
        }
    }else {
        vector<long long> p(n, -1LL), q(n, 0LL);
        p[0] = p0;
        
        long long sum = -1;
        for (int i = 1; i < n; i++) {
            auto [l, r] = transaction(p[i - 1] - 1);
            for (int j = 0; j < l.size(); j++) q[l[j]]++;

            if (l.size() == 1) {
                if (r == 0) p[i] = p[i - 1] - 1;
                else p[i] = p[i - 1] - 2;
            }else if (l.size() == 2) p[i] = p[i - 1] - 2;
            else {
                sum = p0 - r - 1;
                break;
            }
        }
        
        if (sum != -1) {
            for (int i = 2; i < n; i++) {
                sum /= 2;
                auto [l, r] = transaction(sum);
                sum -= r;
            }
        }else {
            for (int i = 1; i < n; i++) {
                while (q[i] < i) {
                    auto [l, r] = transaction(p[i]);
                    q[i]++;
                }
            }
        }
    }
}

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