oj.uz

답안 #731456

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
731456 2023-04-27T12:55:13 Z vjudge1 Političari (COCI20_politicari) C++17
70 / 70
 18 ms 4204 KB 
#include <iostream>
#include <vector>
#include <cstring>
#define int long long
using namespace std;
#define fastio                        \
	ios_base::sync_with_stdio(false); \
	cin.tie(NULL);                    \
	cout.tie(NULL);
signed main()
{
	fastio;
	/* freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout); */
	int n, k;
	cin >> n >> k;
	int a[n + 1][n + 1];
	for (int i = 1; i <= n; ++i)
		for (int j = 1; j <= n; ++j)
			cin >> a[i][j];
	if (k <= 2)
	{
		cout << k;
		return 0;
	}
	int vis[n + 1][n + 1];
	memset(vis, 0, sizeof(vis));
	int p = 0, c = 1;
	vector<int> v;
	v.push_back(1);
	a[c][p] = 2;
	int cycle = 0;
	for (int i = 1; i < k * 3; ++i)
	{
		int t = c;
		c = a[c][p];
		p = t;
		if (vis[c][p])
		{
			cycle = vis[c][p];
			v.pop_back();
			break;
		}
		vis[c][p] = i;
		v.push_back(c);
	}
	// print v
	/* for (auto i : v)
		cout << i << " ";
	cout << endl; */
	--cycle;
	// cout << "cycle " << cycle << endl;
	// cout << "cycle length " << v.size() - cycle << endl;
	if (k < v.size())
	{
		cout << v[k - 1];
		return 0;
	}
	cout << v[(k - cycle - 1) % (v.size() - cycle) + cycle];
	return 0;
}

Compilation message

politicari.cpp: In function 'int main()':
politicari.cpp:54:8: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |  if (k < v.size())
      |      ~~^~~~~~~~~~

Subtask #1
70.0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 3 ms 980 KB Output is correct
3 Correct 10 ms 2772 KB Output is correct
4 Correct 15 ms 3448 KB Output is correct
5 Correct 18 ms 4180 KB Output is correct
6 Correct 18 ms 4196 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 4 ms 1108 KB Output is correct
10 Correct 14 ms 3444 KB Output is correct
11 Correct 17 ms 4204 KB Output is correct
12 Correct 18 ms 4180 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 3 ms 588 KB Output is correct