oj.uz

Submission #480767

# Submission time Handle Problem Language Result Execution time Memory
480767 2021-10-18T03:25:08 Z daongocha timeismoney (balkan11_timeismoney) C++14
60 / 100
 548 ms 976 KB 
#include <bits/stdc++.h>

#define int long long

#define fileopen(a, b) freopen(((std::string)a + ".inp").c_str(), "r", stdin); freopen(((std::string)b + ".out").c_str(), "w", stdout);
#define fileopen1(a) freopen(((std::string)a + ".inp").c_str(), "r", stdin); freopen(((std::string)a + ".out").c_str(), "w", stdout);
 
using namespace std;

const int MAXN = 205;

struct edge {
	int u, v, t, c;
};

#define ld long double
const ld EPS = 1e-9;
ld q;

ld num(edge a) {
	return a.t * q + a.c * (1 - q);
}

bool cmp(edge a, edge b) {
	return num(a) + EPS < num(b);
}

vector<edge> edges;
int n, m;

int dsu[MAXN];

int Find(int u) {
	if (u == dsu[u]) return u;
	return dsu[u] = Find(dsu[u]);
}

void Union(int u, int v) {
	u = Find(u), v = Find(v);
	if (u != v) dsu[v] = u;
}

int solve(ld okayge) {
	q = okayge;
	sort(edges.begin(), edges.end(), cmp);
	for (int i = 1; i <= n; i++) dsu[i] = i;
	int tott = 0, totc = 0;
	for (auto e: edges) {
		int u = e.u, v = e.v;
		if (Find(u) != Find(v)) {
			Union(u, v);
			tott += e.t;
			totc += e.c;
		}
	}
	return tott * totc;
}

void print(ld okayge) {
	q = okayge;
	sort(edges.begin(), edges.end(), cmp);
	for (int i = 1; i <= n; i++) dsu[i] = i;
	int tott = 0, totc = 0;
	for (auto e: edges) {
		int u = e.u, v = e.v;
		if (Find(u) != Find(v)) {
			Union(u, v);
			tott += e.t;
			totc += e.c;
		}
	}
	cout << tott << ' ' << totc << '\n';
	for (int i = 1; i <= n; i++) dsu[i] = i;
	for (auto e: edges) {
		int u = e.u, v = e.v;
		if (Find(u) != Find(v)) {
			Union(u, v);
			cout << u - 1 << ' ' << v - 1 << '\n';
		}
	}
}

signed main() {
	#ifndef PICHU_LOCAL_DEF
		//fileopen1("LAH");
	#endif

	cin.tie(0)->sync_with_stdio(0);

	cin >> n >> m;

	for (int i = 1, u, v, t, c; i <= m; i++) {
		cin >> u >> v >> t >> c;
		u++; v++;
		edges.push_back({u, v, t, c});
	}

	ld l = 0, r = 1;
	for (int i = 1; i <= 200; i++) {
		ld lm = l + (r - l) / 3, rm = r - (r - l) / 3;
		if (solve(lm) > solve(rm)) l = rm;
		else r = lm;
	}

	print(l);
}

Subtask #1
60.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 2 ms 204 KB Output is correct
5 Correct 12 ms 348 KB Output is correct
6 Correct 10 ms 332 KB Output is correct
7 Correct 66 ms 420 KB Output is correct
8 Correct 368 ms 848 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 2 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Incorrect 3 ms 204 KB Output isn't correct
13 Incorrect 2 ms 204 KB Output isn't correct
14 Correct 15 ms 344 KB Output is correct
15 Incorrect 10 ms 336 KB Output isn't correct
16 Incorrect 74 ms 420 KB Output isn't correct
17 Incorrect 71 ms 424 KB Output isn't correct
18 Incorrect 70 ms 332 KB Output isn't correct
19 Incorrect 472 ms 976 KB Output isn't correct
20 Incorrect 548 ms 848 KB Output isn't correct