Submission #163774

#	Time	Username	Problem	Language	Result	Execution time	Memory
163774		MvC	Bootfall (IZhO17_bootfall)	C++11	28 / 100	84 ms	632 KiB

bootfall

#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=5e2+5;
const int mmax=1e4;
const int mod=1e9+7;
using namespace std;
int n,a[nmax],sm,i,j;
vector<int>vc;
bitset<mmax>f[nmax];
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n;
	for(i=1;i<=n;i++)cin>>a[i],sm+=a[i];
	if(sm&1)rc(0);
	for(i=0;i<=n;i++)
	{
		f[i][0]=1;
		for(j=1;j<=n;j++)
		{
			if(i==j)continue;
			f[i]|=(f[i]<<a[j]);
		}
		if(!f[0][sm/2])rc(0);
	}
	for(i=1;i<=250000;i++)
	{
		for(j=1;j<=n;j++)
		{
			if((sm-a[j]+i)&1 || !f[j][(sm-a[j]+i)/2])break;
		}
		if(j==n+1)vc.pb(i);
	}
	cout<<(int)vc.size()<<endl;
	for(i=0;i<(int)vc.size();i++)cout<<vc[i]<<" ";
	cout<<endl;
	return 0;
}

Compilation message (stderr)

bootfall.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
bootfall.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")

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