oj.uz

Submission #673498

# Submission time Handle Problem Language Result Execution time Memory
673498 2022-12-20T17:33:21 Z Lobo Pipes (BOI13_pipes) C++17
65 / 100
 197 ms 52212 KB 
#include<bits/stdc++.h>
using namespace std;
const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
const int maxn = 5e5+10;

int n, m, c[maxn], ans[maxn], gr[maxn];
vector<pair<int,int>> g[maxn], g1[maxn];
int beg;
vector<int> vrt;
void dfs(int u, int ant, int cnt) {
    auto V = g1[u][0];
    if(V.fr == ant) V = g1[u][1];
    int v = V.fr;
    int id = V.sc;
    ans[id] = c[beg]*cnt;
    if(v == beg) return;
    dfs(v,u,cnt*-1);
}

void solve() {
    cin >> n >> m;
    for(int i = 1; i <= n; i++) {
        cin >> c[i];
    }
    for(int i = 1; i <= m; i++) {
        int u,v; cin >> u >> v;
        g[u].pb(mp(v,i));
        g[v].pb(mp(u,i));
        gr[u]++;
        gr[v]++;
    }

    if(m > n) {
        cout << 0 << endl;
        return;
    }
    queue<int> q;
    for(int i = 1; i <= n; i++) {
        if(gr[i] == 1) q.push(i);
    }

    while(q.size()) {
        int u = q.front(); q.pop();
        gr[u] = -1;
        for(auto V : g[u]) {
            int v = V.fr;
            int id = V.sc;
            if(gr[v] == -1) continue;
            ans[id] = 2*c[u];
            c[v]-= c[u];
            if(--gr[v] == 1) q.push(v);
        }
    }

    if(m == n) {
        for(int i = 1; i <= n; i++) {
            if(gr[i] != -1) {
                vrt.pb(i);
                for(auto V : g[i]) {
                    if(gr[V.fr] != -1) {
                        g1[i].pb(V);
                    }
                }
            }
        }
        if(vrt.size()%2 == 1) {
            for(auto x : vrt) {
                if(c[x]) beg = x;
            }
            dfs(beg,-1,1);
        }
        else {

        }

    }

    for(int i = 1; i <= m; i++) {
        cout << ans[i] << endl;
    }
}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    int tt = 1;
    // cin >> tt;
    while(tt--) {
        solve();
    }

}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 23764 KB Output is correct
2 Correct 12 ms 23744 KB Output is correct
3 Correct 13 ms 23904 KB Output is correct
4 Correct 68 ms 32672 KB Output is correct
5 Correct 12 ms 23728 KB Output is correct
6 Correct 12 ms 23832 KB Output is correct
7 Correct 12 ms 23800 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 12 ms 23816 KB Output is correct
10 Correct 12 ms 23876 KB Output is correct
11 Correct 12 ms 23920 KB Output is correct
12 Correct 14 ms 23908 KB Output is correct
13 Correct 63 ms 30932 KB Output is correct
14 Correct 63 ms 32140 KB Output is correct
15 Correct 67 ms 32752 KB Output is correct
16 Correct 63 ms 31344 KB Output is correct
17 Correct 74 ms 32632 KB Output is correct
18 Correct 76 ms 32748 KB Output is correct
19 Correct 79 ms 32360 KB Output is correct
20 Correct 12 ms 23796 KB Output is correct
21 Correct 13 ms 23904 KB Output is correct
22 Correct 75 ms 32716 KB Output is correct
23 Correct 62 ms 30976 KB Output is correct
24 Correct 78 ms 32724 KB Output is correct
25 Correct 59 ms 31288 KB Output is correct

Subtask #2
35.0 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 23724 KB Output isn't correct
2 Incorrect 13 ms 23892 KB Output isn't correct
3 Incorrect 68 ms 34444 KB Output isn't correct
4 Correct 62 ms 31464 KB Output is correct
5 Correct 63 ms 31204 KB Output is correct
6 Correct 197 ms 52208 KB Output is correct
7 Incorrect 13 ms 23764 KB Output isn't correct
8 Incorrect 14 ms 23812 KB Output isn't correct
9 Incorrect 13 ms 23808 KB Output isn't correct
10 Correct 15 ms 23764 KB Output is correct
11 Correct 12 ms 23764 KB Output is correct
12 Correct 16 ms 23740 KB Output is correct
13 Correct 13 ms 23764 KB Output is correct
14 Incorrect 14 ms 23764 KB Output isn't correct
15 Incorrect 13 ms 23948 KB Output isn't correct
16 Incorrect 12 ms 23892 KB Output isn't correct
17 Incorrect 13 ms 23892 KB Output isn't correct
18 Correct 12 ms 23892 KB Output is correct
19 Correct 12 ms 23820 KB Output is correct
20 Correct 12 ms 23892 KB Output is correct
21 Correct 12 ms 24084 KB Output is correct
22 Incorrect 12 ms 23820 KB Output isn't correct
23 Incorrect 65 ms 33744 KB Output isn't correct
24 Incorrect 85 ms 35596 KB Output isn't correct
25 Incorrect 83 ms 34352 KB Output isn't correct
26 Correct 56 ms 31412 KB Output is correct
27 Correct 55 ms 31368 KB Output is correct
28 Correct 54 ms 31660 KB Output is correct
29 Correct 160 ms 46936 KB Output is correct
30 Incorrect 87 ms 34872 KB Output isn't correct
31 Incorrect 89 ms 37312 KB Output isn't correct
32 Incorrect 71 ms 33480 KB Output isn't correct
33 Incorrect 70 ms 35520 KB Output isn't correct
34 Correct 64 ms 31384 KB Output is correct
35 Correct 58 ms 31484 KB Output is correct
36 Correct 55 ms 31396 KB Output is correct
37 Correct 181 ms 52212 KB Output is correct
38 Incorrect 87 ms 35176 KB Output isn't correct
39 Incorrect 82 ms 33100 KB Output isn't correct
40 Incorrect 97 ms 35252 KB Output isn't correct
41 Incorrect 74 ms 37108 KB Output isn't correct
42 Correct 63 ms 31340 KB Output is correct
43 Correct 65 ms 31364 KB Output is correct
44 Correct 57 ms 31120 KB Output is correct
45 Correct 149 ms 49160 KB Output is correct
46 Incorrect 86 ms 34692 KB Output isn't correct
47 Incorrect 78 ms 35416 KB Output isn't correct
48 Incorrect 88 ms 37184 KB Output isn't correct
49 Incorrect 65 ms 32848 KB Output isn't correct
50 Correct 52 ms 31368 KB Output is correct
51 Correct 53 ms 31436 KB Output is correct
52 Correct 52 ms 31264 KB Output is correct
53 Correct 165 ms 48724 KB Output is correct
54 Incorrect 90 ms 34488 KB Output isn't correct