Submission #1285894

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285894		dimitri.shengelia	선물 (IOI25_souvenirs)	C++20	39 / 100	13 ms	400 KiB

souvenirs

#include "souvenirs.h"
#include <bits/stdc++.h>
#include <utility>
#include <vector>

using namespace std;

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

void buy_souvenirs(int N, long long P0) {

	pair <vector<int>, long long> res;

	if ( N == 2 ) {

		transaction ( P0 - 1 );

	} else if ( N == 3 ) {

		res = transaction ( P0 - 1 );

		if ( res.first.size() == 1 ) {

			transaction ( P0 - 1 - res.second - 1 );
			transaction ( P0 - 1 - res.second - 1 );

		} else {

			transaction ( ( P0 - 1 - res.second ) / 2 );

		}

	} else if ( P0 == N ) {

		for ( int i = 1; i < N; i++ ) {

			for ( int j = 0; j < i; j++ ) {

				transaction ( N - i );

			}

		}

	} else {

		pair <long long, long long> a[N];
		for ( int i = 0; i < N; i++ ) {
			a[i].first = 0;
			a[i].second = 0;
		}
		a[0] = { P0, 1 };

		for ( int i = 1; i < N; i++ ) {

			if ( i == N - 1 ) {

				while ( a[i].second < i ) {

					transaction( a[i - 1].first - 1 );
					a[i].second++;

				}

				break;

			}

			res = transaction( a[i - 1].first - 2 );

			if ( res.first.size() == 1 ) {

				if ( res.first[0] == i ) {

					a[i].first = a[i - 1].first - 2;
					a[i].second++;

					while ( a[i].second < i ) {

						transaction( a[i].first );
						a[i].second++;

					}

				} else {

					a[i].first = a[i - 1].first - 1;
					a[i + 1].second++;

					while ( a[i].second < i ) {

						transaction( a[i].first );
						a[i].second++;

					}

				}

			} else {

				a[i].first = a[i - 1].first - 1;
				a[i + 1].second++;
				a[N - 1].second++;

				while ( a[i].second < i ) {

					transaction( a[i].first );
					a[i].second++;

				}

			}

		}

	}

	return;

}

• 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