Submission #1215958

#	Time	Username	Problem	Language	Result	Execution time	Memory
1215958		jerzyk	Security Guard (JOI23_guard)	C++20	50 / 100	102 ms	19100 KiB

guard

#include <bits/stdc++.h>

using namespace std;
#define pb push_back
#define st first
#define nd second
typedef long long ll;
typedef long double ld;
const ll I = 1'000'000'000'000'000'000LL;
const int II = 2'000'000'000;
const ll M = 1'000'000'007LL;
const int N = 1<<19;
int fau[N];
pair<int, pair<int, int>> e[N];
vector<int> ed[N];
int tab[N];
ll ans = 0LL;

int Find(int v)
{
    if(fau[v] == v) return v;
    return (fau[v] = Find(fau[v]));
}

void Union(int a, int b)
{
    fau[Find(b)] = Find(a);
}

void Solve()
{
    int n, m, a, b, q, ma = 0;
    cin >> n >> m >> q;
    for(int i = 1; i <= n; ++i)
    {
        fau[i] = i;
        cin >> tab[i];
        ans -= tab[i];
        ma = max(ma, tab[i]);
    }
    ans += ma;
    for(int i = 1; i <= m; ++i)
    {
        cin >> a >> b;
        e[i] = pair{tab[a] + tab[b], pair{a, b}};
    }
    sort(e + 1, e + 1 + m);
    for(int i = 1; i <= m; ++i)
    {
        if(Find(e[i].nd.st) == Find(e[i].nd.nd)) continue;
        ans += e[i].st;
        Union(e[i].nd.st, e[i].nd.nd);
    }
    cout << ans << "\n";
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    //int t; cin >> t;
    //while(t--)
        Solve();

    return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 12 / 12
• Subtask 4: 13 / 13
• Subtask 5: 0 / 8
• Subtask 6: 0 / 18
• Subtask 7: 0 / 24