oj.uz

답안 #920103

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
920103 2024-02-02T04:28:39 Z jay22 시간이 돈 (balkan11_timeismoney) C++14
100 / 100
 327 ms 852 KB 
#include <iostream>
#include <algorithm>
#include <cstring>

typedef long long ll;
const int LEN = 1e4;
const int V_LEN = 201;
const ll INF = 1e9;

int N, M;

struct Pos { ll x, y; ll f() const { return x * y; } };
ll cross(const Pos& d1, const Pos& d2, const Pos& d3) { return (d2.x - d1.x) * (d3.y - d2.y) - (d2.y - d1.y) * (d3.x - d2.x); }
int ccw(const Pos& d1, const Pos& d2, const Pos& d3) {
    ll c = cross(d1, d2, d3);
    return c > 0 ? 1 : c < 0 ? -1 : 0;
}

int p[V_LEN];
int find(int i) { return p[i] < 0 ? i : p[i] = find(p[i]); }
int join(int a, int b) {
    a = find(a), b = find(b);
    if (a == b) return 0;
    if (p[a] < p[b]) p[a] += p[b], p[b] = a;
    else p[b] += p[a], p[a] = b;
    return 1;
}

ll A, B;

struct Edge {
    ll t, c;
    int u, v;
    ll f() const { return A * t + B * c; }
    bool operator<(const Edge& o) const { return f() < o.f(); }
} edges[LEN];

Pos mst(ll a, ll b) {
    A = a, B = b;
    Pos ret = { 0, 0 };
    std::sort(edges, edges + M);
    memset(p, -1, sizeof p);
    for (int i = 0, j = 0; i < M && j < N - 1; ++i) {
        if (join(edges[i].u, edges[i].v)) {
            ++j;
            ret.x += edges[i].t;
            ret.y += edges[i].c;
        }
    }
    return ret;
}

Pos min_cost;
ll min_a, min_b;

void f(const Pos& s, const Pos& e) {
    ll dx = e.x - s.x;
    ll dy = s.y - e.y;
    Pos m = mst(dy, dx);
    if (m.f() < min_cost.f()) {
        min_cost = m;
        min_a = dy, min_b = dx;
    }
    if (ccw(s, e, m) >= 0) return;
    f(s, m);
    f(m, e);
}

int main() {
    std::cin.tie(0)->sync_with_stdio(0);
    std::cin >> N >> M;
    for (int i = 0; i < M; ++i) std::cin >> edges[i].u >> edges[i].v >> edges[i].t >> edges[i].c;

    Pos s = mst(256, 1);
    Pos e = mst(1, 256);

    if (s.f() < e.f()) min_cost = s, min_a = 256, min_b = 1;
    else min_cost = e, min_a = 1, min_b = 256;
    f(s, e);
    std::cout << min_cost.x << ' ' << min_cost.y << '\n';
    A = min_a, B = min_b;
    std::sort(edges, edges + M);
    memset(p, -1, sizeof p);
    for (int i = 0, j = 0; i < M && j < N - 1; ++i) {
        if (join(edges[i].u, edges[i].v)) {
            ++j;
            std::cout << edges[i].u << ' ' << edges[i].v << '\n';
        }
    }
}

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 4 ms 600 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 3 ms 344 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 35 ms 344 KB Output is correct
17 Correct 39 ms 344 KB Output is correct
18 Correct 35 ms 348 KB Output is correct
19 Correct 317 ms 852 KB Output is correct
20 Correct 327 ms 672 KB Output is correct