oj.uz

Submission #886777

# Submission time Handle Problem Language Result Execution time Memory
886777 2023-12-12T23:01:34 Z WonderfulWhale timeismoney (balkan11_timeismoney) C++17
80 / 100
 2000 ms 1496 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;
	}
	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<sum1*sum2) {
						used[cur[i]] = false;
						cur[i] = j;
						used[j] = true;
						return true;
					}
				}
			}
		}
	}
	return false;
}
	
int32_t main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	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 19 ms 348 KB Output is correct
6 Correct 18 ms 348 KB Output is correct
7 Correct 300 ms 684 KB Output is correct
8 Correct 1810 ms 1496 KB Output is correct
9 Correct 0 ms 348 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 18 ms 528 KB Output is correct
15 Correct 16 ms 516 KB Output is correct
16 Correct 565 ms 696 KB Output is correct
17 Incorrect 399 ms 696 KB Output isn't correct
18 Incorrect 489 ms 600 KB Output isn't correct
19 Execution timed out 2053 ms 1496 KB Time limit exceeded
20 Execution timed out 2066 ms 1496 KB Time limit exceeded