Submission #500858

#	Time	Username	Problem	Language	Result	Execution time	Memory
500858		EliteCallsYou	Bootfall (IZhO17_bootfall)	C++17	0 / 100	0 ms	292 KiB

bootfall

# include <bits/stdc++.h>
using namespace std ;
//############################################################################
# define read(a)/**/for(int i=0;i<int(sizeof(a)/sizeof(a[0]));i++){cin>>a[i];}
# define print(x)/**/for(auto zx:x){cout<<zx<<' ';}
const char* tochar(string a){return a.c_str();}
void files(){freopen("planting.in","r",stdin);freopen("planting.out","w",stdout);}
void speed(){ios_base::sync_with_stdio(false);cin.tie(0);}
long long gcd(long long a,long long b){if(!b){return a;}a%=b;return gcd(b,a);}
long long lcm(long long a,long long b){return a /gcd(a,b) * b;}
//###########################################################################
const int N = 3e5 + 5 ;
const long long MOD = 1e17+7 ;
//###########################################################################
void hack(){}
//###########################################################################
int main(){
	int n, sum = 0 ; cin >> n ;
	int ar[n+1] ;
	for ( int i = 1 ; i <= n ; i ++ ){
		cin >> ar[i] ;
		sum += ar[i] ;
	}
	if ( sum%2 ){
		cout << "0\n";
		return 0 ;
	}
	
	bool dp[n+1][sum+1] = {false} ;
	for ( int i = 0 ; i <= n ; i ++ ){
		dp[i][0] = true ;
		for ( int it = 1 ; it <= n ; it ++ ){
			if ( it == i ){continue;}
			for ( int j = sum-ar[it] ; j > -1 ; j -- ){
				if ( dp[i][j] ){
					dp[i][j+ar[it]] = true ;
				}
			}
		}
	}


	if ( !dp[0][sum/2] ){
		cout << "0\n" ;
		return 0 ;
	}

	vector < int > ans ;
	for ( int cur = 1 ; cur <= sum ; cur ++ ){

		bool ok = true ;

		for ( int j = 1 ; j <= n ; j ++ ){
			int s = sum-ar[j]+cur ;
			if ( s%2 || s < 0 ){
				ok = false ;
				break ;
			}
			if ( !dp[j][s/2] ){
				ok = false ;
				break ;
			}
		}
		if ( ok ){
			ans.push_back(cur) ;
		}
	}


	cout << ans.size() << '\n' ;
	for ( auto it : ans ){
		cout << it << ' ' ;
	}
}	

Compilation message (stderr)

bootfall.cpp: In function 'void files()':
bootfall.cpp:7:21: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 | void files(){freopen("planting.in","r",stdin);freopen("planting.out","w",stdout);}
      |              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
bootfall.cpp:7:54: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 | void files(){freopen("planting.in","r",stdin);freopen("planting.out","w",stdout);}
      |                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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