Submission #984257

#	Time	Username	Problem	Language	Result	Execution time	Memory
984257		farica	Sirni (COCI17_sirni)	C++14	0 / 140	434 ms	181404 KiB

sirni

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

using namespace std;

const int MAX_N = 10000001, MAX_SIZ = 100000;

int T[MAX_N], parent[MAX_SIZ], siz[MAX_SIZ];

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;
    int a[n];
    for(int i=0; i<n; ++i) {
        cin >> a[i];
        if(a[i] == a[i-1]) {
            --n, --i;
            continue;
        }
        parent[i] = i;
        siz[i] = 1;
    }
    sort(a, a+n);
    memset(T, -1, sizeof T);
    for(int i=0; i<n; ++i) T[a[i]] = i;
    for(int i=a[n-1]; i>0; --i) {
        if(T[i] != -1) continue;
        T[i] = T[i+1];
    }
    int ans = 0;
    vector<pair<int,pair<int,int>>>pq;
    for(int i=0; i<n-1; ++i) {
        pq.push_back({a[T[a[i]+1]]%a[i], {T[a[i]+1], i}});
        for(int j=2*a[i]; j<=a[n-1]; j+=a[i]) {
            int p = T[j];
            pq.push_back({a[p]%a[i], {p, i}});
        }
    }
    sort(pq.begin(), pq.end());
    for(int i=0; i<pq.size(); ++i) {
        int w = pq[i].first, x = pq[i].second.first, y = pq[i].second.second;
        if(find_parent(x) == find_parent(y)) continue;
        unite(x, y);
        ans += w;
    }
    cout << ans << endl;
}

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

    return 0;
}

Compilation message (stderr)

sirni.cpp: In function 'void solve()':
sirni.cpp:53:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for(int i=0; i<pq.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