Submission #984290

#	Time	Username	Problem	Language	Result	Execution time	Memory
984290		farica	Sirni (COCI17_sirni)	C++14	84 / 140	1164 ms	786432 KiB

sirni

#include <bits/stdc++.h>
#define int long long

using namespace std;

const int MAX_N = 100000;

int parent[MAX_N], siz[MAX_N];

int find_parent(int x) {
    if(parent[x] == x) return x;
    return parent[x] = find_parent(parent[x]);
}

void unite(int a, int b) {
    int x = find_parent(a), y = find_parent(b);
    if(x==y) return;
    if(siz[x] < siz[y]) swap(x,y);
    siz[x] += siz[y];
    parent[y] = x;
}

void solve() {
    int n;
    cin >> n;
    vector<int>a;
    for(int i=0; i<n; ++i) {
        int tmp;
        cin >> tmp;
        assert(tmp>=1);
        a.push_back(tmp);
        parent[i] = i;
        siz[i] = 1;
    }
    sort(a.begin(), a.end());
    a.erase(unique(a.begin(), a.end()), a.end());
    int largest = a.back();
    vector<int>T(largest+1, -1);
    for(int i=0; i<a.size(); ++i) T[a[i]] = i;
    for(int i=largest-1; i>=0; --i) {
        if(T[i] != -1) continue;
        T[i] = T[i+1];
    }
    int ans = 0;
    vector<vector<pair<int,int>>>pq(largest+1);
    for(int i=0; i<a.size()-1; ++i) {
        pq[a[i+1]%a[i]].push_back({i+1, i});
        for(int j=2*a[i]; j<=largest; j+=a[i]) {
            int p = T[j];
            pq[a[p]%a[i]].push_back({p, i});
        }
    }
    for(int i=0; i<=largest; ++i) {
        for(pair<int,int>cur: pq[i]) {
            if(find_parent(cur.first) == find_parent(cur.second)) continue;
            unite(cur.first,cur.second);
            ans += i;
        }
    }
    cout << ans << endl;
}

signed main()
{
    int t=1;
    while(t--) solve();

    return 0;
}

Compilation message (stderr)

sirni.cpp: In function 'void solve()':
sirni.cpp:39:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for(int i=0; i<a.size(); ++i) T[a[i]] = i;
      |                  ~^~~~~~~~~
sirni.cpp:46:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for(int i=0; i<a.size()-1; ++i) {
      |                  ~^~~~~~~~~~~

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