oj.uz

Submission #885160

# Submission time Handle Problem Language Result Execution time Memory
885160 2023-12-09T05:30:47 Z 12345678 Pipes (BOI13_pipes) C++17
90.9259 / 100
 107 ms 37544 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=5e5+5;
int 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);
        int l=-1e9, r=1e9;
        while (l<r)
        {
            vector<int> t(c.size());
            int md=(l+r+1)/2;
            //cout<<"here "<<l<<' '<<r<<' '<<md<<'\n';
            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;
        }
        //cout<<"here"<<' '<<l<<'\n';
        //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:54:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |             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 21080 KB Output is correct
2 Correct 4 ms 21084 KB Output is correct
3 Correct 4 ms 21084 KB Output is correct
4 Correct 44 ms 25284 KB Output is correct
5 Correct 4 ms 21080 KB Output is correct
6 Correct 4 ms 21084 KB Output is correct
7 Correct 5 ms 21084 KB Output is correct
8 Correct 4 ms 21084 KB Output is correct
9 Correct 6 ms 21104 KB Output is correct
10 Correct 4 ms 21084 KB Output is correct
11 Correct 4 ms 21152 KB Output is correct
12 Correct 4 ms 21336 KB Output is correct
13 Correct 33 ms 24344 KB Output is correct
14 Correct 44 ms 24920 KB Output is correct
15 Correct 41 ms 25180 KB Output is correct
16 Correct 49 ms 24508 KB Output is correct
17 Correct 54 ms 25168 KB Output is correct
18 Correct 40 ms 25168 KB Output is correct
19 Correct 45 ms 30796 KB Output is correct
20 Correct 4 ms 21084 KB Output is correct
21 Correct 4 ms 21084 KB Output is correct
22 Correct 44 ms 25140 KB Output is correct
23 Correct 32 ms 24328 KB Output is correct
24 Correct 42 ms 25148 KB Output is correct
25 Correct 35 ms 24412 KB Output is correct

Subtask #2
60.9259259259 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 21084 KB Output isn't correct
2 Correct 5 ms 21348 KB Output is correct
3 Correct 37 ms 28836 KB Output is correct
4 Correct 30 ms 18152 KB Output is correct
5 Correct 28 ms 18260 KB Output is correct
6 Correct 104 ms 28720 KB Output is correct
7 Incorrect 4 ms 21084 KB Output isn't correct
8 Incorrect 4 ms 21084 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 14936 KB Output is correct
14 Correct 4 ms 21084 KB Output is correct
15 Correct 4 ms 21336 KB Output is correct
16 Correct 5 ms 21084 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 14940 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 21156 KB Output is correct
23 Correct 47 ms 31520 KB Output is correct
24 Correct 57 ms 32464 KB Output is correct
25 Correct 37 ms 28892 KB Output is correct
26 Correct 28 ms 18320 KB Output is correct
27 Correct 29 ms 17964 KB Output is correct
28 Correct 32 ms 18516 KB Output is correct
29 Correct 97 ms 26088 KB Output is correct
30 Incorrect 67 ms 36504 KB Output isn't correct
31 Incorrect 59 ms 37076 KB Output isn't correct
32 Incorrect 49 ms 27856 KB Output isn't correct
33 Correct 45 ms 30412 KB Output is correct
34 Correct 30 ms 18012 KB Output is correct
35 Correct 29 ms 18244 KB Output is correct
36 Correct 30 ms 18524 KB Output is correct
37 Correct 107 ms 28752 KB Output is correct
38 Correct 53 ms 34760 KB Output is correct
39 Correct 45 ms 26964 KB Output is correct
40 Incorrect 51 ms 31816 KB Output isn't correct
41 Correct 45 ms 34768 KB Output is correct
42 Correct 30 ms 18012 KB Output is correct
43 Correct 28 ms 17976 KB Output is correct
44 Correct 29 ms 18260 KB Output is correct
45 Correct 84 ms 27304 KB Output is correct
46 Correct 71 ms 37544 KB Output is correct
47 Correct 63 ms 32040 KB Output is correct
48 Correct 60 ms 36548 KB Output is correct
49 Correct 35 ms 24916 KB Output is correct
50 Correct 28 ms 18520 KB Output is correct
51 Correct 28 ms 18260 KB Output is correct
52 Correct 28 ms 17992 KB Output is correct
53 Correct 91 ms 26824 KB Output is correct
54 Correct 56 ms 33996 KB Output is correct