oj.uz

Submission #885157

# Submission time Handle Problem Language Result Execution time Memory
885157 2023-12-09T05:23:18 Z 12345678 Pipes (BOI13_pipes) C++17
89.6296 / 100
 123 ms 41328 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=5e5+5;
ll n, m, h[nx], u, v, sz, res[nx], vs[nx], cy[nx], pa[nx], pidx[nx], cnt;
vector<pair<int, int>> d[nx], c;

void dfs(int u, int p, int idx)
{
    vs[u]=1; pa[u]=p; pidx[u]=idx;
    for (auto [v, id]:d[u]) 
    {
        if (v==p||cy[v]) continue;
        if (!vs[v]) dfs(v, u, id);
        else
        {
            int tmp=u;
            while (tmp!=v) cy[tmp]=1, c.push_back({tmp, pidx[tmp]}), tmp=pa[tmp], cnt++;
            cy[v]=1; cnt++; c.push_back({v, id});
        }
    }
    if (idx==-1||m==n) return;
    res[idx]=2*h[u];
    h[p]-=h[u];
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m;
    for (int i=1; i<=n; i++) cin>>h[i];
    for (int i=1; i<=m; i++) cin>>u>>v, d[u].push_back({v, i}), d[v].push_back({u, i});
    if (m>n) {cout<<0; return 0;}
    dfs(1, 1, -1);
    if (cnt%2==0&&cnt!=0) {cout<<0; return 0;}
    if (m<n) for (int i=1; i<n; i++) cout<<res[i]<<'\n';
    else
    {
        m=n-1;
        for (int i=1; i<=n; i++) vs[i]=0;
        for (auto [x, y]:c) dfs(x, x, -1);
        ll l=-1e9, r=1e9;
        while (l<r)
        {
            vector<int> t(c.size());
            int md=(l+r+1)/2;
            t[0]+=md;
            t[c.size()-1]+=md;
            res[c[c.size()-1].second]=2*md;
            for (int i=1; i<c.size(); i++) t[i]+=(h[c[i-1].first]-t[i-1]), res[c[i-1].second]=2*(h[c[i-1].first]-t[i-1]);
            if (t[c.size()-1]>h[c[c.size()-1].first]) r=md-1;
            else l=md;
        }
        //for (int i=1; i<=n; i++) if (cy[i]) cout<<i<<' '<<h[i]<<'\n';
        for (int i=1; i<=m+1; i++) cout<<res[i]<<'\n';
    }
}

/*
4 4
2 0 2 2
1 2
1 3
2 3
3 4
*/

Compilation message

pipes.cpp: In function 'int main()':
pipes.cpp:53:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |             for (int i=1; i<c.size(); i++) t[i]+=(h[c[i-1].first]-t[i-1]), res[c[i-1].second]=2*(h[c[i-1].first]-t[i-1]);
      |                           ~^~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 21084 KB Output is correct
2 Correct 5 ms 21084 KB Output is correct
3 Correct 4 ms 21084 KB Output is correct
4 Correct 43 ms 27180 KB Output is correct
5 Correct 4 ms 21080 KB Output is correct
6 Correct 4 ms 21084 KB Output is correct
7 Correct 4 ms 21100 KB Output is correct
8 Correct 4 ms 21080 KB Output is correct
9 Correct 5 ms 21084 KB Output is correct
10 Correct 4 ms 21080 KB Output is correct
11 Correct 4 ms 21084 KB Output is correct
12 Correct 6 ms 21084 KB Output is correct
13 Correct 34 ms 24280 KB Output is correct
14 Correct 43 ms 24912 KB Output is correct
15 Correct 58 ms 27348 KB Output is correct
16 Correct 36 ms 24688 KB Output is correct
17 Correct 44 ms 27228 KB Output is correct
18 Correct 44 ms 27360 KB Output is correct
19 Correct 57 ms 33612 KB Output is correct
20 Correct 4 ms 21080 KB Output is correct
21 Correct 4 ms 21084 KB Output is correct
22 Correct 43 ms 27144 KB Output is correct
23 Correct 35 ms 24400 KB Output is correct
24 Correct 49 ms 27220 KB Output is correct
25 Correct 38 ms 24512 KB Output is correct

Subtask #2
59.6296296296 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 21080 KB Output isn't correct
2 Correct 5 ms 21340 KB Output is correct
3 Correct 47 ms 29872 KB Output is correct
4 Correct 30 ms 18268 KB Output is correct
5 Correct 29 ms 18260 KB Output is correct
6 Correct 110 ms 28824 KB Output is correct
7 Incorrect 4 ms 21084 KB Output isn't correct
8 Incorrect 4 ms 21164 KB Output isn't correct
9 Correct 3 ms 19036 KB Output is correct
10 Correct 3 ms 14940 KB Output is correct
11 Correct 3 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 4 ms 14940 KB Output is correct
14 Correct 4 ms 21080 KB Output is correct
15 Correct 4 ms 21592 KB Output is correct
16 Correct 4 ms 21184 KB Output is correct
17 Correct 4 ms 19036 KB Output is correct
18 Correct 3 ms 14940 KB Output is correct
19 Correct 3 ms 14936 KB Output is correct
20 Correct 3 ms 14940 KB Output is correct
21 Correct 4 ms 14940 KB Output is correct
22 Correct 4 ms 21084 KB Output is correct
23 Correct 63 ms 32712 KB Output is correct
24 Correct 60 ms 35700 KB Output is correct
25 Correct 41 ms 29908 KB Output is correct
26 Correct 30 ms 18256 KB Output is correct
27 Correct 30 ms 18012 KB Output is correct
28 Correct 31 ms 18516 KB Output is correct
29 Correct 123 ms 26040 KB Output is correct
30 Incorrect 64 ms 40140 KB Output isn't correct
31 Incorrect 67 ms 40904 KB Output isn't correct
32 Incorrect 66 ms 30616 KB Output isn't correct
33 Correct 47 ms 33672 KB Output is correct
34 Correct 33 ms 18032 KB Output is correct
35 Correct 31 ms 18008 KB Output is correct
36 Correct 30 ms 18524 KB Output is correct
37 Correct 112 ms 28996 KB Output is correct
38 Incorrect 76 ms 38420 KB Output isn't correct
39 Correct 49 ms 29520 KB Output is correct
40 Incorrect 60 ms 35068 KB Output isn't correct
41 Correct 48 ms 38352 KB Output is correct
42 Correct 31 ms 17996 KB Output is correct
43 Correct 39 ms 18116 KB Output is correct
44 Correct 30 ms 18268 KB Output is correct
45 Correct 93 ms 27340 KB Output is correct
46 Correct 75 ms 41328 KB Output is correct
47 Correct 59 ms 35264 KB Output is correct
48 Correct 78 ms 40336 KB Output is correct
49 Correct 39 ms 25296 KB Output is correct
50 Correct 30 ms 18260 KB Output is correct
51 Correct 32 ms 18268 KB Output is correct
52 Correct 29 ms 18008 KB Output is correct
53 Correct 96 ms 26824 KB Output is correct
54 Correct 69 ms 37352 KB Output is correct