Submission #863425

#	Time	Username	Problem	Language	Result	Execution time	Memory
863425		vjudge1	Političari (COCI20_politicari)	C++17	70 / 70	16 ms	5368 KiB

politicari

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define fi first
#define se second
#define pb push_back
#define endl "\n"
#define int long long

using namespace std;

typedef tuple<int, int, int> iii;
typedef long long ll;
const int mod =998244353;

int n, k;
int a[505][505], vis[505][505];
vector<int> v, vv;

int mOd(int x, int y){
	if(x%y)return x%y;
	else return y;
}
int32_t main(){	
	fast;
	cin>>n>>k;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			cin>>a[i][j];
		}
	}
	if(k==1){
		cout<<1<<endl;
		return 0;
	}
	else k--;
	int i=2, j=1, ind=0, cnt;
	while(true){
		if(vis[i][j]){
			//~ cout<<i<<" :: "<<j<<endl;
			for(int k=vis[i][j];k<=(int)v.size()-1;k++){
				vv.pb(v[k]);
			}
			cnt=vis[i][j];
			break;
		}
		vis[i][j]=ind;
		v.pb(i);
		ind++;
		int t=i;
		i=a[i][j];
		j=t;
	}
	//~ cout<<v.size()<<" :: "<<vv.size()<<" :: "<<cnt<<endl;
	//~ for(auto it: v){
		//~ cout<<it<<" v ";
	//~ }
	//~ cout<<endl;
	//~ for(auto it: vv){
		//~ cout<<it<<" vv ";
	//~ }
	//~ cout<<endl;
	if(k<=cnt){
		cout<<v[k-1]<<endl;
	}
	else{
		k-=cnt;
		cout<<vv[mOd(k, (int)vv.size())-1]<<endl;
	}
	
}	

• Subtask 1: 70 / 70