oj.uz

Submission #732194

# Submission time Handle Problem Language Result Execution time Memory
732194 2023-04-28T15:51:26 Z Koful123 Političari (COCI20_politicari) C++17
70 / 70
 17 ms 4180 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
#define ff first
#define ss second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

void solve(){

	int n,k;
	cin >> n >> k; --k;

	vector<vector<int>> v(n),vis(n);
	for(int i = 0; i < n; i++){
		v[i].assign(n,0); vis[i].assign(n,-1);
		for(int j = 0; j < n; j++){
			cin >> v[i][j];
		}
	}

	vector<int> cyc(1,0);

	int last = 0,cur = 1;
	while(vis[last][cur] == -1){
		vis[last][cur] = cyc.size() - 1;
		cyc.push_back(cur);
		int tmp = last; last = cur;
		cur = v[cur][tmp] - 1;	
	}

	cyc.pop_back();
	if(k <= vis[last][cur]){
		cout << 1 + cyc[k] << endl;
		return;
	}

	else k -= vis[last][cur];

	vector<int> nw;
	for(int i = vis[last][cur]; i < cyc.size(); i++){
		nw.push_back(cyc[i]);
	}

	cout << 1 + nw[k % nw.size()] << endl;
}
 
signed main(){ 

	ios::sync_with_stdio(0);
	cin.tie(0);
 
	int t = 1;
//	cin >> t;
 
	while(t--)
		solve();
 	
	return 0;
}

Compilation message

politicari.cpp: In function 'void solve()':
politicari.cpp:43:32: 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]
   43 |  for(int i = vis[last][cur]; i < cyc.size(); i++){
      |                              ~~^~~~~~~~~~~~

Subtask #1
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 4 ms 980 KB Output is correct
3 Correct 11 ms 2716 KB Output is correct
4 Correct 15 ms 3540 KB Output is correct
5 Correct 16 ms 4180 KB Output is correct
6 Correct 17 ms 4180 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 2 ms 600 KB Output is correct
9 Correct 5 ms 1108 KB Output is correct
10 Correct 15 ms 3412 KB Output is correct
11 Correct 16 ms 4172 KB Output is correct
12 Correct 17 ms 4180 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 596 KB Output is correct