oj.uz

Submission #228500

# Submission time Handle Problem Language Result Execution time Memory
228500 2020-05-01T09:13:11 Z Fischer Pipes (BOI13_pipes) C++14
74.0741 / 100
 267 ms 15084 KB 
/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author Miguel Mini
 */

#include <bits/stdc++.h>
#define sz(x) (int)x.size()
#define trav(v, x) for (auto v : x)
#define re(x, y, z) for (int x=y; x<z; ++x)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define set_to(x, v) fill(all(x), v)
#define eb emplace_back
#define lso(x) ((x)&-(x))
using namespace std;
using ll = long long;
using ii = pair<int, int>;
using vi = vector<int>;
const int mod = 1e9 + 7;
const int maxn = 1e5 + 10;
const int inf = INT_MAX;
vector<ii> g[maxn];

class pipes {
public:

    void solveOne(istream& in, ostream& out) {
        int n, m;
        in >> n >> m;
        if (m > n) {
            out << 0 << endl;
            return;
        }
        vector<ll> c(n);
        vi deg(n);
        trav(&v, c) in >> v;
        vector<ii> edges;
        re(i, 0, m) {
            int a, b;
            in >> a >> b;
            a -= 1; b -= 1;
            edges.eb(a, b);
            g[a].eb(b, i); deg[a] += 1;
            g[b].eb(a, i); deg[b] += 1;
        }
        vi res(m);
        vector<bool> vis(m);
        queue<int> Q;
        re(i, 0, n) {
            if (sz(g[i]) == 1) {
                Q.push(i);
            }
        }
        while (!Q.empty()) {
            int q = Q.front(); Q.pop();
            for (auto v : g[q]) {
                int id = v.second;
                if (vis[id]) continue;
                vis[id] = 1;
                m -= 1;
                res[id] = 2 * c[q];
                int u = v.first;
                c[u] -= c[q];
                deg[u] -= 1;
                if (deg[u] == 1) {
                    Q.push(u);
                }
            }
        }
        if (m == 0) {
            trav(v, res) out << v << endl;
        } else if (m&1) {
            int x = 0;
            while (deg[x] == 0) x += 1;
            if (x == n) {
                out << 0 << endl;
                return;
            }
            ll sum = 0;
            vector<int> t;
            function<int(int, vi&, ll&)> dfs = [&](int v, vi& t, ll& sum)->int {
                if (deg[v] != 2) return -inf;
                sum = c[v] - sum;
                trav(node, g[v]) {
                    if (!vis[node.second]) {
                        vis[node.second] = 1;
                        t.emplace_back(node.second);
                        if (node.first == x) return 1;
                        return dfs(node.first, t, sum) + 1;
                    }
                }
                return -inf;
            };
            if (dfs(x, t, sum) == m) {
                //trav(v, t) cout << v << " "; cout << endl;
                res[t[0]] = sum;
                re(i, 1, sz(t)) {
                    x ^= edges[t[i-1]].first ^ edges[t[i-1]].second;
                    res[t[i]] = 2 * c[x] - sum;
                    sum = res[t[i]];
                }
                trav(v, res) out << v << endl;
            } else out << 0 << endl;
        } else {
            out << 0 << endl;
        }
    }

    void solve(istream& in, ostream& out) {
        int testNumber = 1;
        //in >> testNumber;
        re(tc, 1, testNumber+1) {
            //out << "Case #" << tc << ": ";
            solveOne(in, out);
        }
    }
};


int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
	pipes solver;
	std::istream& in(std::cin);
	std::ostream& out(std::cout);
	solver.solve(in, out);
	return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 2688 KB Output is correct
2 Correct 6 ms 2688 KB Output is correct
3 Correct 8 ms 2688 KB Output is correct
4 Correct 252 ms 9452 KB Output is correct
5 Correct 6 ms 2688 KB Output is correct
6 Correct 7 ms 2688 KB Output is correct
7 Correct 6 ms 2688 KB Output is correct
8 Correct 6 ms 2688 KB Output is correct
9 Correct 8 ms 2688 KB Output is correct
10 Correct 8 ms 2688 KB Output is correct
11 Correct 8 ms 2688 KB Output is correct
12 Correct 8 ms 2688 KB Output is correct
13 Correct 207 ms 8172 KB Output is correct
14 Correct 231 ms 9068 KB Output is correct
15 Correct 267 ms 9708 KB Output is correct
16 Correct 224 ms 8428 KB Output is correct
17 Correct 265 ms 9452 KB Output is correct
18 Correct 259 ms 9520 KB Output is correct
19 Correct 247 ms 8812 KB Output is correct
20 Correct 6 ms 2688 KB Output is correct
21 Correct 8 ms 2688 KB Output is correct
22 Correct 265 ms 9452 KB Output is correct
23 Correct 207 ms 8044 KB Output is correct
24 Correct 264 ms 9580 KB Output is correct
25 Correct 213 ms 8276 KB Output is correct

Subtask #2
44.0740740741 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 2688 KB Output isn't correct
2 Incorrect 8 ms 2816 KB Output isn't correct
3 Correct 58 ms 8300 KB Output is correct
4 Correct 6 ms 2688 KB Output is correct
5 Correct 6 ms 2688 KB Output is correct
6 Correct 6 ms 2688 KB Output is correct
7 Incorrect 7 ms 2688 KB Output isn't correct
8 Incorrect 6 ms 2688 KB Output isn't correct
9 Correct 6 ms 2688 KB Output is correct
10 Correct 6 ms 2688 KB Output is correct
11 Correct 6 ms 2688 KB Output is correct
12 Correct 6 ms 2688 KB Output is correct
13 Correct 6 ms 2688 KB Output is correct
14 Incorrect 6 ms 2688 KB Output isn't correct
15 Incorrect 8 ms 2816 KB Output isn't correct
16 Incorrect 8 ms 2816 KB Output isn't correct
17 Correct 6 ms 2816 KB Output is correct
18 Correct 6 ms 2688 KB Output is correct
19 Correct 6 ms 2688 KB Output is correct
20 Correct 6 ms 2688 KB Output is correct
21 Correct 6 ms 2688 KB Output is correct
22 Incorrect 6 ms 2688 KB Output isn't correct
23 Incorrect 206 ms 11500 KB Output isn't correct
24 Incorrect 263 ms 12780 KB Output isn't correct
25 Correct 67 ms 8300 KB Output is correct
26 Correct 6 ms 2688 KB Output is correct
27 Correct 6 ms 2688 KB Output is correct
28 Correct 6 ms 2688 KB Output is correct
29 Correct 6 ms 2688 KB Output is correct
30 Incorrect 66 ms 8172 KB Output isn't correct
31 Incorrect 257 ms 15084 KB Output isn't correct
32 Incorrect 249 ms 10476 KB Output isn't correct
33 Correct 60 ms 8556 KB Output is correct
34 Correct 6 ms 2688 KB Output is correct
35 Correct 6 ms 2688 KB Output is correct
36 Correct 6 ms 2688 KB Output is correct
37 Correct 6 ms 2688 KB Output is correct
38 Incorrect 261 ms 12268 KB Output isn't correct
39 Incorrect 70 ms 8940 KB Output isn't correct
40 Incorrect 63 ms 8556 KB Output isn't correct
41 Correct 58 ms 8300 KB Output is correct
42 Correct 6 ms 2688 KB Output is correct
43 Correct 6 ms 2688 KB Output is correct
44 Correct 6 ms 2688 KB Output is correct
45 Correct 6 ms 2688 KB Output is correct
46 Incorrect 260 ms 11756 KB Output isn't correct
47 Incorrect 60 ms 8556 KB Output isn't correct
48 Incorrect 266 ms 14956 KB Output isn't correct
49 Correct 65 ms 8556 KB Output is correct
50 Correct 6 ms 2688 KB Output is correct
51 Correct 6 ms 2688 KB Output is correct
52 Correct 6 ms 2688 KB Output is correct
53 Correct 6 ms 2688 KB Output is correct
54 Incorrect 62 ms 8300 KB Output isn't correct