oj.uz

Submission #621355

# Submission time Handle Problem Language Result Execution time Memory
621355 2022-08-03T18:01:24 Z 353cerega Pipes (BOI13_pipes) C++17
74.0741 / 100
 109 ms 16196 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>


using namespace std;


using ll = long long;
using ld = long double;

#define X first
#define Y second

//const ll mod = 1000000007;
const ll mod = 998244353;





void solve()
{
    ll n, m;
    cin >> n >> m;
    if (m>n)
    {
        cout << 0 << "\n";
        return;
    }
    vector<ll> a(n);
    ll W = 0;
    for (ll i=0;i<n;i++)
    {
        cin >> a[i];
        W += a[i];
    }
    if (W%2!=0)
    {
        cout << 0 << "\n";
        return;
    }
    vector<ll> b(m), d(n);
    vector<pair<ll,ll>> e(m);
    vector<vector<ll>> g(n);
    for (ll i=0;i<m;i++)
    {
        ll u, v;
        cin >> u >> v;
        u--, v--;
        g[u].push_back(i);
        g[v].push_back(i);
        e[i] = {u,v};
        d[u]++, d[v]++;
    }
    vector<ll> was(m), ans(m);
    set<ll> kek;
    for (ll i=0;i<n;i++) if (d[i]==1) kek.insert(i);
    while (kek.size()>0)
    {
        ll u = *kek.begin();
        ll w = a[u];
        for (ll p: g[u])
        {
            if (was[p]==1) continue;
            was[p] = 1;
            d[e[p].X]--;
            if (d[e[p].X]==1) kek.insert(e[p].X);
            if (d[e[p].X]==0) kek.erase(e[p].X);
            d[e[p].Y]--;
            if (d[e[p].Y]==1) kek.insert(e[p].Y);
            if (d[e[p].Y]==0) kek.erase(e[p].Y);
            a[e[p].X] -= w;
            a[e[p].Y] -= w;
            ans[p] = w;
        }
    }
    ll D = 0;
    for (ll i=0;i<n;i++) if (d[i]==2) D++;
    if (D==0)
    {
        for (ll i=0;i<n;i++)
        {
            if (a[i]!=0)
            {
                cout << 0 << "\n";
                return;
            }
        }
        for (ll i=0;i<m;i++) cout << ans[i]*2 << "\n";
        return;
    }
    if (D%2==0)
    {
        cout << 0 << "\n";
        return;
    }
    for (ll st=0;st<n;st++)
    {
        if (d[st]!=2) continue;
        vector<ll> used(n);
        ll u = st;
        vector<ll> A, B;
        ll S = 0;
        for (ll k=0;k<D;k++)
        {
            A.push_back(a[u]);
            S += a[u];
            for (ll p: g[u])
            {
                if (was[p]==1) continue;
                was[p] = 1;
                B.push_back(p);
                u = u^e[p].X^e[p].Y;
                break;
            }
        }
        S /= 2;
        for (ll i=2;i<D;i+=2) S -= A[i];
        ll L = 0, R = D-1;
        for (ll i=0;i!=D-2;i=(i+2)%D)
        {
            ans[B[i]] = S;
            L = (L+2)%D;
            S += A[L];
            R = (R+2)%D;
            S -= A[R];
        }
        for (ll i=0;i<m;i++) cout << ans[i] << "\n";
        return;
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    ll T;
    T = 1;
    //cin >> T;
    while (T--) solve();
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 324 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 83 ms 16076 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 69 ms 12852 KB Output is correct
14 Correct 88 ms 15408 KB Output is correct
15 Correct 98 ms 16196 KB Output is correct
16 Correct 83 ms 13728 KB Output is correct
17 Correct 88 ms 16124 KB Output is correct
18 Correct 99 ms 16196 KB Output is correct
19 Correct 89 ms 13544 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 109 ms 16160 KB Output is correct
23 Correct 69 ms 12840 KB Output is correct
24 Correct 89 ms 16176 KB Output is correct
25 Correct 75 ms 13516 KB Output is correct

Subtask #2
44.0740740741 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Incorrect 1 ms 468 KB Output isn't correct
3 Correct 66 ms 13892 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Incorrect 2 ms 340 KB Output isn't correct
8 Incorrect 1 ms 340 KB Output isn't correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Incorrect 1 ms 212 KB Output isn't correct
15 Incorrect 1 ms 456 KB Output isn't correct
16 Incorrect 1 ms 460 KB Output isn't correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 324 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Incorrect 1 ms 468 KB Output isn't correct
23 Incorrect 78 ms 13168 KB Output isn't correct
24 Incorrect 89 ms 15436 KB Output isn't correct
25 Correct 65 ms 13892 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Incorrect 81 ms 14784 KB Output isn't correct
31 Incorrect 86 ms 15668 KB Output isn't correct
32 Incorrect 103 ms 15708 KB Output isn't correct
33 Correct 82 ms 14088 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Incorrect 84 ms 15432 KB Output isn't correct
39 Incorrect 94 ms 15800 KB Output isn't correct
40 Incorrect 79 ms 15572 KB Output isn't correct
41 Correct 57 ms 13128 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 0 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Incorrect 78 ms 14872 KB Output isn't correct
47 Incorrect 83 ms 15620 KB Output isn't correct
48 Incorrect 69 ms 15840 KB Output isn't correct
49 Correct 91 ms 14780 KB Output is correct
50 Correct 1 ms 332 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 0 ms 340 KB Output is correct
54 Incorrect 72 ms 15300 KB Output isn't correct