Submission #700078

#	Time	Username	Problem	Language	Result	Execution time	Memory
700078		fdnfksd	Bootfall (IZhO17_bootfall)	C++14	100 / 100	620 ms	3444 KiB

bootfall

#include<bits/stdc++.h>
#define TASKNAME "bieudo"
#define pb push_back
#define pli pair<int,int>
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=int;
const ll maxN=600;
const ll mod=1e9+19972207;
ll dp[505*505];
ll cnt[505*505]={0};
ll n,a[maxN];
void solve()
{
    cin >> n;
    ll m=0;
    for(int i=1;i<=n;i++) cin >> a[i],m+=a[i];
    dp[0]=1;
    for(int i=1;i<=n;i++)
    {
        for(int j=m;j>=a[i];j--)
        {
            dp[j]+=dp[j-a[i]];
            if(dp[j]>=mod) dp[j]-=mod;
            //dp2[j]+=dp2[j-a[i]];
            //if(dp2[j]>=mod2) dp2[j]-=mod2;
        }
    }
    if(m%2!=0)
    {
        cout << 0;
        return;
    }
    ll x=m/2;
    if(dp[x]==0)
    {
        cout << 0;
        return;
    }
    for(int i=1;i<=n;i++)
    {
        for(int j=a[i];j<=m;j++)
        {
            dp[j]-=dp[j-a[i]];
            if(dp[j]<0) dp[j]+=mod;
        }
        for(int j=0;j<=(m-a[i])/2;j++)
        {
            if(dp[j]>0)
            {
                cnt[m-j-a[i]-j]++;
            }
        }
        for(int j=m;j>=a[i];j--)
        {
            dp[j]+=dp[j-a[i]];
            if(dp[j]>=mod) dp[j]-=mod;
        }
    }
    vector<ll> ans;
    for(int i=1;i<=m;i++)
    {
        if(cnt[i]==n)
        {
            ans.pb(i);
        }
    }
    cout <<ans.size()<<'\n';
    for(auto zz:ans) cout << zz <<' ';
}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

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