Submission #1037534

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037534		ByeWorld	Bootfall (IZhO17_bootfall)	C++14	100 / 100	228 ms	5888 KiB

bootfall

#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define int long long
#define ll long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
using namespace std;
typedef pair<int,int> pii;
typedef pair<int,pii> ipii;
const int MAXN = 505;
const int MAXA = 250100;
const int MAXK = 1e5+10;
const int INF = 1e18+10;
void chmn(int &a, int b){ a = min(a, b); }

int n;
int a[MAXN], sum;
vector <int> ans;
int dp[MAXA], can[MAXA];

signed main(){
    // ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    for(int i=1; i<=n; i++){ cin >> a[i]; sum += a[i]; }

    dp[0] = 1;
    for(int i=1; i<=n; i++){
    	for(int j=sum; j>=a[i]; j--){
    		dp[j] += dp[j-a[i]];
    	}
    }
	if(sum%2==1 || !dp[sum/2]){
		cout << "0\n"; exit(0);
	}

	for(int i=1; i<=n; i++){
    	for(int j=a[i]; j<=sum; j++){
    		dp[j] -= dp[j-a[i]];
    	}
    	for(int x=1; x<=sum; x++){
    		int num = sum+x-a[i];
    		if(num%2==0 && dp[num/2]) can[x]++;
    	}
    	for(int j=sum; j>=a[i]; j--){
    		dp[j] += dp[j-a[i]];
    	}
	}

    for(int i=1; i<=sum; i++)
    	if(can[i]==n) ans.pb(i);
    cout << ans.size() << '\n';
    for(auto in : ans) cout << in << ' ';
    cout << '\n';
}

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