Submission #541120

#	Time	Username	Problem	Language	Result	Execution time	Memory
541120		vinnipuh01	Bootfall (IZhO17_bootfall)	C++17	100 / 100	399 ms	7584 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>
#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 )
*/

int n, a[ 10001 ], dp[ 2500001 ], mp[ 2500001 ], mpp[ 2500001 ];
vector <int> v;
int mod = 1e9 + 7;

main () {
	cin >> n;
	dp[ 0 ] = 1;
	for ( int i = 1; i <= n; i ++ ) {
		cin >> a[ i ];
		for ( int j = sum; j >= 0; j -- ) {
			dp[ j + a[ i ] ] += dp[ j ];
			if ( dp[ j + a[ i ] ] >= mod )
				dp[ j + a[ i ] ] -= mod;
		}
		sum += a[ i ];
	}
	if ( sum % 2 || !dp[ sum / 2 ] ) {
		cout << 0;
		return 0;
	}
	for ( int i = 1; i <= n; i ++ ) {
		for ( int j = 0; j <= sum; j ++ )
			mp[ j ] = dp[ j ];
		for ( int j = 0; j <= sum; j ++ ) {
			if ( a[ i ] + j > sum )
				break;
			mp[ j + a[ i ] ] += mod - mp[ j ];
			if ( mp[ j + a[ i ] ] >= mod )
				mp[ j + a[ i ] ] -= mod;
		}
		num = sum - a[ i ];
		for ( int j = 1; j <= num; j ++ ) {
			if ( ( num + j ) % 2 )
				continue;
			if ( mp[ ( num + j ) / 2 - j ] )
				mpp[ j ] ++;
		}
	}
	for ( int i = 1; i <= sum; i ++ ) {
		if ( mpp[ i ] == n )
			v.push_back( i );
	}
	cout << v.size() << "\n";
	for ( auto i : v )
		cout << i << " ";
}

/*
6
3 6 4 5 1 2

*/

Compilation message (stderr)

bootfall.cpp:50:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   50 | main () {
      | ^~~~

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