Submission #1126609

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126609		brover29	Bootfall (IZhO17_bootfall)	C++20	6 / 100	1095 ms	396 KiB

bootfall

#include <bits/stdc++.h>
//qwerty47924692
using namespace std;
using ll = long long;
const ll N=2e5+29;
const string br="617283";

ll n,a[N],ok=0;
set<ll>s;
set<ll>x;
void f(ll x,ll i,ll s1=0,ll s2=0){
    if(x==n){
        if(i==n+1&&s1==s2){
            ok=1;

        }
        s.insert(abs(s1-s2));
        return;
    }
    x++;
    if(x==i){
        f(x,i,s1,s2);
        return;
    }
    f(x,i,s1+a[x],s2);
    f(x,i,s1,s2+a[x]);
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin>>n;
    for(ll i=1;i<=n;i++){
        cin>>a[i];
    }
    f(0,1);
    swap(s,x);
    s.clear();
    f(0,n+1);
    if(!ok){
        cout<<0;
        return 0;
    }
    for(ll i=2;i<=n;i++){
        f(0,i);
        for(auto it=x.begin();it!=x.end();){
            if(s.find(*it)==s.end()){
                it=x.erase(it);
            }else it++;
        }
        s.clear();
    }
    cout<<x.size()<<'\n';
    for(ll i:x){
        cout<<i<<' ';
    }
}

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