Submission #851444

#	Time	Username	Problem	Language	Result	Execution time	Memory
851444		damwuan	Sirni (COCI17_sirni)	C++17	140 / 140	975 ms	504116 KiB

sirni

#include<bits/stdc++.h>
using namespace std;
#define task "CC"
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define bit(n,i) ((n>>i)&1)
#define all(x) x.begin(),x.end()
//#pragma GCC optimize("Ofast,unroll-loops")
//#pragma GCC target("avx,avx2,bmi,bmi2,sse,sse2,sse3,ssse3,sse4,popcnt")
//#define int long long
typedef long long ll;
typedef pair<int,int> pii;
typedef double ld;
typedef pair<ld,ld> pdd;
typedef pair<ll,ll> pll;
const ll maxn=1e7+1;
const ll N=1e5+2;

int n,nxt[maxn+1],par[N],x[N];
bool ct[N];
vector<pii> Edge[maxn];
int Find(int v) {

    return (par[v] < 0) ?v: (par[v] = Find(par[v]));
}

bool Union(int x, int y) {

    if ((x = Find(x)) == (y = Find(y)))
    {
        return false ;
    }
    if (par[y] < par[x])
    {
        swap(x, y);
    }
    par[x] += par[y];
    par[y] = x;
    return true;
}
void sol()
{
    cin >> n;
    for (int i=1;i<=n;i++)
    {
        cin >> x[i];
        par[i]=-1;
    }
    sort(x+1,x+1+n);
    for1(i,1,n)
    {
        if (nxt[x[i]]==0) nxt[x[i]]=i;
    }
    int ans=0;
    nxt[(int)x[n]+1]=-1;
    for2(i,x[n],1)
    {
        if (nxt[i]==0) nxt[i]=nxt[i+1];
        //cerr<< i<< ' '<<nxt[i]<<'\n';
    }
//    for (int i=1;i<=x[n];i++)
//    {
//        //cerr<<"wtf\n";
//        if (nxt[i]==i)
//        {
//            if (nxt[i+1]==-1) continue;
//            Edge[nxt[i+1]-i].pb({nxt[i+1],i});
//            for (int j=2*i;j<=x[n];j+=i)
//            {
//                if (nxt[j]==-1) break;
//                Edge[nxt[j]-j].pb({nxt[j],i});
//            }
//        }
//    }
    for1(k,1,n)
    {
        if (x[k]==x[k-1]) continue;
        int i=x[k];
        if (nxt[i+1]==-1) continue;
        Edge[x[nxt[i+1]]-i].pb({nxt[i+1],k});
        if (ct[k]) continue;
        for (int j=2*i;j<=x[n];j+=i)
        {
            if (nxt[j]==-1) break;
            Edge[x[nxt[j]]-j].pb({nxt[j],k});
            if (x[nxt[j]]==j) ct[nxt[j]]=1;

        }
    }

    for (int i=0;i<=x[n];i++)
    {

    for (auto x:Edge[i])
    {
        //cerr<<i<<' '<<x.se<<' '<<x.fi<<'\n';
        if (!Union(x.fi,x.se)) continue;
        ans+=i;
    }
    Edge[i].clear();
    }

    cout << ans;

}
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    sol();
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 14 / 14
• Subtask 7: 14 / 14
• Subtask 8: 14 / 14
• Subtask 9: 14 / 14
• Subtask 10: 14 / 14