Submission #888585

#	Time	Username	Problem	Language	Result	Execution time	Memory
888585		asdasdqwer	Sirni (COCI17_sirni)	C++14	0 / 140	835 ms	133624 KiB

sirni

// #pragma GCC optimze("O3")
// #pragma GCC target("avx,avx2,sse4")

#include <bits/stdc++.h>
using namespace std;

#define int int64_t

struct DSU {
    vector<int> p, r;
    DSU(int n) {
        p.assign(n,0);
        r.assign(n,0);
        for (int i=0;i<n;i++)p[i]=i;
    }

    int get(int i) {
        if (i != p[i]) p[i]=get(p[i]);
        return p[i];
    }

    bool unite(int a,int b) {
        a=get(a);
        b=get(b);
        if (a==b)return false;
        if (r[a]<r[b])swap(a,b);
        p[b]=a;
        if (r[a]==r[b])r[a]++;
        return true;
    }
};

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n;cin>>n;
    vector<int> a(n);
    for (int &x:a)cin>>x;
    sort(a.begin(),a.end());
    vector<int> b;
    for (int x:a) {
        if (b.size()==0||b.back()!=x)b.push_back(x);
    }

    vector<int> clos(b.back()+1,-1);
    for (int x:b) {
        clos[x]=x;
    }

    for (int i=clos.size()-2;i>=0;i--) {
        if (clos[i] == -1) {
            clos[i]=clos[i+1];
        }
    }

    typedef array<int,3> pii;
    vector<pii> edg;
    for (int x:b) {
        vector<pii> tmp;
        for (int j=2*x;j<=b.back();j+=x) {
            if (clos[j] != -1) {
                if (!tmp.size()) {
                    tmp.push_back({clos[j] % x, clos[j], x});
                }

                else if (tmp.back()[1] != clos[j]) {
                    tmp.push_back({clos[j] % x, clos[j], x});
                }
            }
        }

        if (tmp.size() == 0 || tmp.back()[1] != clos[b.back()]) {
            tmp.push_back({clos[b.back()] % x, clos[b.back()], x});
        }

        for (auto x:tmp) edg.push_back(x);
    }

    sort(edg.begin(),edg.end());
    map<int,int> mp;
    for (int i=0;i<b.size();i++) {
        mp[b[i]]=i;
    }

    for (auto &x:edg) {
        x[1]=mp[x[1]];
        x[2]=mp[x[2]];
    }

    DSU d(b.size());
    int cost=0;
    for (auto x:edg) {
        if (d.unite(x[1], x[2])) {
            // cout<<b[x[1]]<<" "<<b[x[2]]<<"\n";
            cost+=x[0];
        }
    }
    cout<<cost<<"\n";
}

Compilation message (stderr)

sirni.cpp: In function 'int main()':
sirni.cpp:82:19: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::vector<long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |     for (int i=0;i<b.size();i++) {
      |                  ~^~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14