Submission #541065

#	Time	Username	Problem	Language	Result	Execution time	Memory
541065		vinnipuh01	Bootfall (IZhO17_bootfall)	C++17	0 / 100	1 ms	212 KiB

bootfall

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

using namespace std;

const long long oo = 1000000000000000000;

long long int  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 )
*/

int n, a[ 5001 ], dp[ 250001 ];
vector <int> v;

bool ok( int x ) {
	a[ n + 1 ] = x;
	for ( int i = 1; i <= n; i ++ ) {
		num = sum + x - a[ i ];
		if ( num % 2 )
			return false;
		num /= 2;
		for ( int k = num; k >= 1; k -- )
			dp[ k ] = 0;
		dp[ 0 ] = 1;
		for ( int j = 1; j <= n + 1; j ++ ) {
			if ( j == i )
				continue;
			for ( int k = num; k >= 0; k -- ) {
				if ( dp[ k ] && k + a[ j ] <= num ) {
					dp[ k + a[ j ] ] = 1;
				}
			}
		}
		if ( !dp[ num ] ) {
			return false;
		}
	}
	return true;
}

set <int> st;

int main () {
	cin >> n;
	for ( int i = 1; i <= n; i ++ ) {
		cin >> a[ i ], sum += a[ i ];
		st.insert( a[ i ] );
		if ( a[ i ] % 2 )
			num ++;
		else
			ans ++;
	}
	dp[ 0 ] = 1;
	if ( ( num && ans ) || sum % 2 ) {
		cout << "0";
		return 0;
	}
	num = sum / 2;
	for ( int i = 1; i <= n; i ++ ) {
		for ( int j = num; j >= 0; j -- ) {
			if ( j + a[ i ] <= num && dp[ j ] )
				dp[ j + a[ i ] ] = 1;
		}
	}
	if ( !dp[ num ] ) {
		cout << 0;
		return 0;
	}
	for ( int i = 1; i <= 500; i ++ ) {
		if ( ok( i ) )
			v.push_back( i );
	}
	cout << v.size() << "\n";
	for ( auto i : v )
		cout << i << " ";
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 7
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35