oj.uz

Submission #201072

# Submission time Handle Problem Language Result Execution time Memory
201072 2020-02-09T09:36:36 Z mraron Političari (COCI20_politicari) C++14
70 / 70
 25 ms 3452 KB 
#include<iostream>
#include<vector>
#include<map>
#include<set>
#include<cassert>
#include<cassert>
#include<unordered_map>
#include<unordered_set>
#include<functional>
#include<queue>
#include<stack>
#include<cstring>
#include<algorithm>
#include<cmath>
#include<sstream>
#include<iomanip>
#include<cstdio>
#include<cstdlib>
#include<numeric>
#include<random>
#include<chrono>
#include<bitset>
using namespace std;

#define all(x) (x).begin(), (x).end()
#define pb push_back
#define xx first
#define yy second
#define sz(x) (int)(x).size()
#define gc getchar
#define IO ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define mp make_pair

#ifndef ONLINE_JUDGE
#  define LOG(x) (cerr << #x << " = " << (x) << endl)
#else
#  define LOG(x) ((void)0)
#endif

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const double PI=3.1415926535897932384626433832795;
const ll INF = 1LL<<62;
const ll MINF = -1LL<<62;

template<typename T> T getint() {
	T val=0;
	char c;
	
	bool neg=false;
	while((c=gc()) && !(c>='0' && c<='9')) {
		neg|=c=='-';
	}

	do {
		val=(val*10)+c-'0';
	} while((c=gc()) && (c>='0' && c<='9'));

	return val*(neg?-1:1);
}

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); uniform_int_distribution<int>(0, n-1)(rng)

ll n,k;
ll t[501][501];
ll volt[501][501];




int main() {
	IO;
	cin>>n>>k;
	for(int i=1;i<=n;++i) {
		for(int j=1;j<=n;++j) {
			cin>>t[i][j];
		}
	}

	if(k==1) cout<<"1\n";
	else if(k==2) cout<<"2\n";
	else {
		ll ind=3;
		pair<int,int> state={1,2};
		k-=2;

		while(k>0) {	
			state.xx=t[state.yy][state.xx];
			swap(state.xx,state.yy);
			k--;
			if(volt[state.xx][state.yy]) {
				break ;
			}
			volt[state.xx][state.yy]=ind++;
		}

		if(k==0) {
			cout<<state.yy<<"\n";
		}else {
			ll cycle=ind-volt[state.xx][state.yy];
			//cerr<<cycle<<"\n";
			k%=cycle;
			while(k>0) {	
				state.xx=t[state.yy][state.xx];
				swap(state.xx,state.yy);
				k--;
			}
		
			cout<<state.yy<<"\n";
		}
	}
	
	
	return 0;
}

Subtask #1
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 10 ms 2040 KB Output is correct
3 Correct 24 ms 2680 KB Output is correct
4 Correct 19 ms 2936 KB Output is correct
5 Correct 25 ms 3192 KB Output is correct
6 Correct 21 ms 2936 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 6 ms 1144 KB Output is correct
9 Correct 11 ms 2040 KB Output is correct
10 Correct 20 ms 2808 KB Output is correct
11 Correct 25 ms 3452 KB Output is correct
12 Correct 24 ms 3324 KB Output is correct
13 Correct 5 ms 632 KB Output is correct
14 Correct 6 ms 1272 KB Output is correct