oj.uz

Submission #223055

# Submission time Handle Problem Language Result Execution time Memory
223055 2020-04-14T15:11:08 Z dolphingarlic timeismoney (balkan11_timeismoney) C++14
50 / 100
 35 ms 1152 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 + A.t * A.c == B.t + B.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
50.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 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 10 ms 384 KB Output is correct
8 Correct 35 ms 640 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Incorrect 5 ms 384 KB Unexpected end of file - int32 expected
11 Correct 5 ms 384 KB Output is correct
12 Incorrect 5 ms 384 KB Unexpected end of file - int32 expected
13 Incorrect 5 ms 384 KB Output isn't correct
14 Runtime error 5 ms 640 KB Execution killed with signal 11 (could be triggered by violating memory limits)
15 Incorrect 5 ms 384 KB Output isn't correct
16 Runtime error 7 ms 640 KB Execution killed with signal 11 (could be triggered by violating memory limits)
17 Incorrect 10 ms 384 KB Output isn't correct
18 Incorrect 10 ms 384 KB Output isn't correct
19 Runtime error 10 ms 1152 KB Execution killed with signal 11 (could be triggered by violating memory limits)
20 Incorrect 32 ms 640 KB Output isn't correct