Submission #1008280

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008280		Almonther	Bootfall (IZhO17_bootfall)	C++98	28 / 100	249 ms	4952 KiB

bootfall

#include <bits/stdc++.h>

#define suiii ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define co cout<<
//#pragma GCC optimize("O3,Ofast,unroll-loops")
//#pragma GCC target("avx2,sse3,sse4,avx")
using namespace std;
//stuff
int vis[105][10005];
int arr[105];
ll skipped;
int ans=0;
int n,wholesum=0;
map<int,int>mp;
ll sum=0;
void rec(int x){
    if(vis[x][sum]||ans) return;
    if(skipped==x){
        rec(x+1);
        return;
    }
    if(x==n+1){
        if(sum==wholesum-sum) ans=1;
        return;
    }
    vis[x][sum]=1;
    if(x==n){
        ll k=wholesum-sum;
        mp[abs(sum-k)]++;
        return;
    }
    sum+=arr[x];
    rec(x+1);
    sum-=arr[x];
    rec(x+1);
}
void solve(){
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>arr[i];
        wholesum+=arr[i];
    }
    skipped=n;
    rec(0);
    if(ans==0){
        co 0;
        return;
    }
    ans=0;
    vector<int>answers;
    for(int i=0;i<n;i++){
        memset(vis,0,sizeof(vis));
        wholesum-=arr[i];
        skipped=i;
        rec(0);
        wholesum+=arr[i];
    }
    for(auto i:mp){
        if(i.first<1) continue;
        if(i.second/2==n) answers.push_back(i.first);
    }
    
    co answers.size()<<'\n';
    for(auto i:answers) co i<<' ';
}

int main()
{
    suiii
    int t=1;
    // cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

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