oj.uz

Submission #886781

# Submission time Handle Problem Language Result Execution time Memory
886781 2023-12-12T23:09:19 Z WonderfulWhale timeismoney (balkan11_timeismoney) C++17
80 / 100
 940 ms 1520 KB 
#include<bits/stdc++.h>
using namespace std;

#define int int64_t
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()

int n, m;
vector<pair<int, pii>> G[209];
vector<pair<pii, pii>> edges;
vector<int> cur;
vector<int> G2[209];
bool used[10009];

bool vis[209];

int p[209];
int Find(int x) {
	return p[x]==x?x:p[x]=Find(p[x]);
}
void Union(int a, int b) {
	p[Find(a)] = Find(b);
}

void dfs(int x, int y) {
	vis[x] = true;
	for(int z:G2[x])
		if(z!=y) 
			dfs(z, x);
}

bool improve() {
	int sum1=0, sum2=0;
	for(int i=0;i<n;i++) G2[i].clear();
	for(int i=0;i<n-1;i++) {
		auto e = edges[cur[i]];
		G2[e.st.st].pb(e.st.nd);
		G2[e.st.nd].pb(e.st.st);
		sum1 += e.nd.st, sum2 += e.nd.nd;
	}
	tuple<int, int, int> Opt = {-1, -1, sum1*sum2};
	for(int i=0;i<n-1;i++) {
		auto e = edges[cur[i]];
		memset(vis, 0, sizeof(vis));
		dfs(e.st.st, e.st.nd);
		for(int j=0;j<m;j++) {
			if(!used[j]) {
				auto ne = edges[j];
				if(vis[ne.st.st]^vis[ne.st.nd]) {
					int nsum1 = sum1-e.nd.st+ne.nd.st;
					int nsum2 = sum2-e.nd.nd+ne.nd.nd;
					if(nsum1*nsum2<(get<2>(Opt))) {
						Opt = {i, j, nsum1*nsum2};
					}
				}
			}
		}
	}
	if(get<0>(Opt)==-1) return false;
	auto [a, b, c] = Opt;
	used[cur[a]] = false;
	cur[a] = b;
	used[b] = true;
	return true;
}
	
int32_t main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	srand(666);

	cin >> n >> m;
	iota(p, p+n, 0);
	for(int i=0;i<m;i++) {
		int a, b, c, d;
		cin >> a >> b >> c >> d;
		G[a].pb({b, {c, d}});
		G[b].pb({a, {c, d}});
		edges.pb({{a, b}, {c, d}});
	}
	random_shuffle(all(edges));
	for(int i=0;i<m;i++) {
		auto [x, y] = edges[i];
		if(Find(x.st)!=Find(x.nd)) {
			used[i] = true;
			cur.pb(i);
			Union(x.st, x.nd);
		} 
	}
	while(improve()) {}
	int sum1=0, sum2=0;
	vector<pii> ans;
	for(int x:cur) {
		sum1 += edges[x].nd.st;
		sum2 += edges[x].nd.nd;
		ans.pb(edges[x].st);
	}
	cout << sum1 << " " << sum2 << "\n";
	for(pii x:ans) 
		cout << x.st << " " << x.nd << "\n";
}

Subtask #1
80.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 10 ms 348 KB Output is correct
6 Correct 16 ms 520 KB Output is correct
7 Correct 171 ms 604 KB Output is correct
8 Correct 735 ms 1492 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 11 ms 528 KB Output is correct
15 Correct 15 ms 348 KB Output is correct
16 Incorrect 172 ms 696 KB Output isn't correct
17 Incorrect 185 ms 712 KB Output isn't correct
18 Incorrect 234 ms 604 KB Output isn't correct
19 Correct 940 ms 1520 KB Output is correct
20 Incorrect 765 ms 1496 KB Output isn't correct