Submission #691410

#	Time	Username	Problem	Language	Result	Execution time	Memory
691410		Huy	Sirni (COCI17_sirni)	C++17	140 / 140	1504 ms	170052 KiB

sirni

#include<bits/stdc++.h>
//#define int long long
#define pii pair<int,int>
#define fi first
#define se second
#pragma GCC tarGet ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC tarGet("avx,avx2,fma")
using namespace std;
using ll = long long;
const int mod = 1e9+7;
const int maxN = 1e5+5;
const int N = 1e7;
const ll infty = 1e16;
void InputFile()
{
    freopen("test.inp","r",stdin);
    //freopen("SHOPPING.out","w",stdout);
    //freopen("test.out","r",stdin);
}

struct TEdge
{
    int a,b,c;
};

bool FA(TEdge a,TEdge b)
{
    return a.c < b.c;
}

vector<TEdge> vc;

int n;
int a[maxN];
int marc[N+1];
int lab[N+1];
int maxi = 0;

int Findset(int u)
{
    if(lab[u] < 0) return u;
    return lab[u] = Findset(lab[u]);
}

ll res = 0;
int cnt_e = 0;

bool Merge(int u,int v,int val)
{
    u = Findset(u);
    v = Findset(v);
    if(u == v)
        return false;
    if(lab[u] > lab[v]) swap(u,v);
    res += val;
    cnt_e++;
    lab[u] += lab[v];
    lab[v] = u;
    return true;
}

void Read()
{
    cin >> n;
    for(int i = 1;i <= n;i++)
    {
        cin >> a[i];
        marc[a[i]] = 1;
        maxi = max(maxi,a[i]);
        lab[a[i]] = -1;
    }
    if(a[1] == 1)
    {
        cout << 0 <<'\n';
        return;
    }
    sort(a + 1,a + n + 1);

    for(int i = 1;i <= maxi;i++)
    {
        marc[i] += marc[i-1];
    }

    for(int i = 1;i <= n;i++)
    {
        if(a[i] == a[i-1]) {cnt_e++;continue;}
        for(int j = a[i];j <= maxi;j += a[i])
        {
            if(marc[j+a[1]-1] - marc[j-1])
            {
                int x = j;
                if(x == a[i])
                    x++;
                int v = lower_bound(a + 1,a + n + 1,x) - a;
                if(v > n) continue;
                v = a[v];
                int val = v % a[i];
                vc.push_back({a[i],v,val});
            }
        }
    }

    //cout <<"Dark";return;


    sort(vc.begin(),vc.end(), FA);
    for(TEdge x : vc)
    {
        Merge(x.a,x.b,x.c);
    }
    //cout << cnt_e;return;
    cout << res + (ll)(n - 1 - cnt_e) * (ll)a[1];
}

void Solve()
{

}

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    //InputFile();
    //int sub_type;
    //cin >> sub_type;
    //Sieve();
    //Prepare();
    int test;
    //cin >> test;
    test = 1;
    while(test--)
        //for(int prc = 1; prc <= test; prc++)
    {
        Read();
        Solve();
        //Debug();
    }
}

Compilation message (stderr)

sirni.cpp:6: warning: ignoring '#pragma GCC tarGet' [-Wunknown-pragmas]
    6 | #pragma GCC tarGet ("avx2")
      | 
sirni.cpp:7: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    7 | #pragma GCC optimization ("O3")
      | 
sirni.cpp:8: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    8 | #pragma GCC optimization ("unroll-loops")
      | 
sirni.cpp:10: warning: ignoring '#pragma GCC tarGet' [-Wunknown-pragmas]
   10 | #pragma GCC tarGet("avx,avx2,fma")
      | 
sirni.cpp: In function 'void InputFile()':
sirni.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen("test.inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• 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