Submission #1064805

#	Time	Username	Problem	Language	Result	Execution time	Memory
1064805		GusterGoose27	Security Guard (JOI23_guard)	C++17	50 / 100	120 ms	12384 KiB

guard

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 2e5+5;
int n, m, q;

typedef long long ll;
typedef array<int, 2> ar2;

int uf[MAXN];
int val[MAXN];
ar2 edges[2*MAXN];

int find(int i) {
	return uf[i] == i ? i : uf[i] = find(uf[i]);
}

int wt(ar2 i) {
	return val[i[0]] + val[i[1]];
}

struct cmp {
	bool operator()(ar2 i, ar2 j) {
		return ar2({wt(i), i[0]}) < ar2({wt(j), j[0]});
	}
} cmp;

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	cin >> n >> m >> q;
	assert(q == 0);
	iota(uf, uf+n, 0);
	ll s = 0;
	int mx = 0;
	for (int i = 0; i < n; i++) {
		cin >> val[i];
		s -= val[i];
		mx = max(val[i], mx);
	}
	s += mx;
	for (int i = 0; i < m; i++) {
		int a, b; cin >> a >> b;
		edges[i] = {a-1, b-1};
	}
	sort(edges, edges+m, cmp);
	for (int i = 0; i < m; i++) {
		int a = find(edges[i][0]);
		int b = find(edges[i][1]);
		int v = wt(edges[i]);
		if (a != b) {
			uf[a] = b;
			s += v;
		}
	}
	cout << s << '\n';
}

• 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