제출 #1256464

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1256464		pandaa73	Souvenirs (IOI25_souvenirs)	C++20	22 / 100	0 ms	412 KiB

souvenirs

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

#define lf "\n"
#define ff endl
#define _ << ' ' <<
#define all(x) begin(x),end(x)
#define rall(x) rbegin(x),rend(x)

#define infos(str) do { fprintf(stderr, str"\n"); } while(0)
#define infor(str, ...) do { fprintf(stderr, str, __VA_ARGS__); } while(0)
#define infof(str, ...) do { fprintf(stderr, str"\n", __VA_ARGS__); } while(0)

#ifndef DEBUG

#undef infos
#undef infor
#undef infof

#define infos(str)
#define infor(str, ...)
#define infof(str, ...)

#endif

using ll = long long;

constexpr int LOG = 20;
constexpr int MOD = 1e9+7;
constexpr int MAXN = 1e5+7;

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

void buy_souvenirs(int N, long long P0) {
    if(N == 2) return (void)(transaction(P0 - 1));

    assert(N == 3);

    auto [q, x] = transaction(P0 - 1);

    ll pay = P0 - 1 - x;

    if(q.size() == 1) {
        transaction(pay - 1);
        transaction(pay - 1);

        return;
    }

    transaction((pay - 1) / 2);
}

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