oj.uz

답안 #223056

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
223056 2020-04-14T15:12:37 Z dolphingarlic 시간이 돈 (balkan11_timeismoney) C++14
65 / 100
 56 ms 640 KB 
#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;

struct Line {
    int u, v;
    ll t, c;
} lines[10000];

bool operator<(Line A, Line B) {
    if (A.t + A.c == B.t + B.c) {
        if (A.u == B.u) return A.v < B.v;
        return A.u < B.u;
    }
    return A.t + A.c > B.t + B.c;
}

int cmp[200];

int find(int A) {
    while (A != cmp[A]) cmp[A] = cmp[cmp[A]], A = cmp[A];
    return A;
}

void onion(int A, int B) { cmp[find(A)] = cmp[find(B)]; }

set<Line> graph[200];
bool has_cycle[200];
vector<Line> in_cycle;

void dfs(int target, int node, int parent = -1) {
    if (node == target) {
        has_cycle[node] = true;
        return;
    }
    for (Line i : graph[node]) {
        if (i.u != parent && i.v != parent) {
            dfs(target, node == i.u ? i.v : i.u, node);
            if (has_cycle[node == i.u ? i.v : i.u]) {
                in_cycle.push_back(i);
                has_cycle[node] = true;
                return;
            }
        }
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    FOR(i, 0, m) cin >> lines[i].u >> lines[i].v >> lines[i].t >> lines[i].c;
    sort(lines, lines + m);
    iota(cmp, cmp + n, 0);

    set<Line> res;
    ll t = 0, c = 0;
    FOR(i, 0, m) {
        if (find(lines[i].u) != find(lines[i].v)) {
            t += lines[i].t, c += lines[i].c;
            onion(lines[i].u, lines[i].v);
            res.insert(lines[i]);
            graph[lines[i].u].insert(lines[i]);
            graph[lines[i].v].insert(lines[i]);
        } else {
            fill(has_cycle, has_cycle + n, false);
            in_cycle.clear();
            dfs(lines[i].u, lines[i].v);

            ll best = t * c;
            Line to_remove;
            for (Line j : in_cycle) {
                if ((t - j.t + lines[i].t) * (c - j.c + lines[i].c) < best) {
                    best = (t - j.t + lines[i].t) * (c - j.c + lines[i].c);
                    to_remove = j;
                }
            }
            if (best != t * c) {
                res.insert(lines[i]);
                assert(res.find(to_remove) != res.end());
                res.erase(to_remove);
                graph[to_remove.u].erase(to_remove);
                graph[to_remove.v].erase(to_remove);
                graph[lines[i].u].insert(lines[i]);
                graph[lines[i].v].insert(lines[i]);
                t += lines[i].t - to_remove.t;
                c += lines[i].c - to_remove.c;
            }
        }
    }

    cout << t << ' ' << c << '\n';
    for (Line i : res) cout << i.u << ' ' << i.v << '\n';
    return 0;
}

Subtask #1
65.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 15 ms 384 KB Output is correct
8 Correct 56 ms 640 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Incorrect 5 ms 384 KB Output isn't correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Incorrect 6 ms 384 KB Output isn't correct
15 Correct 5 ms 384 KB Output is correct
16 Incorrect 13 ms 384 KB Output isn't correct
17 Incorrect 13 ms 384 KB Output isn't correct
18 Incorrect 13 ms 384 KB Output isn't correct
19 Incorrect 43 ms 640 KB Output isn't correct
20 Incorrect 48 ms 640 KB Output isn't correct