Submission #534925

#	Time	Username	Problem	Language	Result	Execution time	Memory
534925		vinnipuh01	Bosses (BOI16_bosses)	C++17	0 / 100	1 ms	460 KiB

bosses

#include <iostream>
#include <bits/stdc++.h>
#include <cmath>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
#include <stack>
#include <string>
#include <map>
#include <queue>
#define int long long

using namespace std;

const long long oo = 1000000000000000000;

long long sum, ans = 0, mx = 0, mn = 1000000000, num, pos;


/*
    ViHHiPuh

   (( `'-""``""-'` ))
     )-__-_.._-__-(
   / --- (o _ o) --- \
   \ .-* ( .0. ) *-. /
   _'-. ,_ '=' _, .-'_
  / `;#'#'# - #'#'#;` \
 \_)) -----'#'----- ((_/
      # --------- #
  '# ------- ------ #'
  /..-'# ------- #'-.\
  _\...-\'# -- #'/-.../_
  ((____)- '#' -(____))


    cout << fixed << setprecision(6) << x;

    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    freopen ( "sum.in", "r", stdin )
*/

vector <int> v[ 10001 ];
int d[ 10001 ], p[ 10001 ];
queue <int> q;
bool used[ 100001 ];
int n, col[ 100001 ];
vector <pair<int, int> > vv;

int bfs( int x ) {
	d[ 0 ] = 0;
	for ( int i = 1; i <= n; i ++ ) {
		d[ i ] = 1;
		col[ i ] = 0;
		used[ i ] = 0;
		p[ i ] = 0;
	}
	q.push( x );
	used[ x ] = 1;
	col[ x ] = 1;
	while ( q.size() ) {
		int g = q.front();
		q.pop();
		for ( auto to : v[ g ] ) {
			if ( !used[ to ] ) {
				q.push( to );
				col[ to ] = col[ g ] + 1;
				p[ to ] = g;
				used[ to ] = 1;
			}
		}
	}
	vv.clear();
	for ( int i = 1; i <= n; i ++ ) {
		vv.push_back( { col[ i ], i } );
	}
	sort( vv.begin(), vv.end() );
	reverse( vv.begin(), vv.end() );
	for ( auto i : vv ) {
		d[ p[ i.second ] ] += d[ i.second ];
	}
	sum = 0;
//	cout << x << ":";
	for ( int i = 1; i <= n; i ++ ) {
//		cout << i << " - " << p[ i ] << " " << d[ i ] << "\n";
		sum += d[ i ];
	}
//	cout << sum << "\n";
	return sum;
}

main () {
	cin >> n;
		int k, x;
	for ( int i = 1; i <= n; i ++ ) {
		cin >> k;
		for ( int j = 1; j <= k; j ++ ) {
			cin >> x;
			v[ x ].push_back( i );
		}
	}
	mx = oo;
	for ( int i = 1; i <= n; i ++ ) {
		mx = min( mx, bfs( i ) + 0ll );
	}
	cout << mx;
}

Compilation message (stderr)

bosses.cpp:95:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   95 | main () {
      | ^~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33