oj.uz

Submission #885158

# Submission time Handle Problem Language Result Execution time Memory
885158 2023-12-09T05:26:09 Z 12345678 Pipes (BOI13_pipes) C++17
81.8519 / 100
 1000 ms 37064 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)/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;
            else l=md+1;
        }
        //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 21080 KB Output is correct
2 Correct 5 ms 21084 KB Output is correct
3 Correct 4 ms 21084 KB Output is correct
4 Correct 42 ms 25168 KB Output is correct
5 Correct 4 ms 21084 KB Output is correct
6 Correct 4 ms 21112 KB Output is correct
7 Correct 4 ms 21080 KB Output is correct
8 Correct 4 ms 21080 KB Output is correct
9 Correct 4 ms 21084 KB Output is correct
10 Correct 4 ms 21084 KB Output is correct
11 Correct 4 ms 21084 KB Output is correct
12 Correct 4 ms 21084 KB Output is correct
13 Correct 33 ms 24376 KB Output is correct
14 Correct 51 ms 25076 KB Output is correct
15 Correct 40 ms 25172 KB Output is correct
16 Correct 34 ms 24656 KB Output is correct
17 Correct 41 ms 25168 KB Output is correct
18 Correct 55 ms 25172 KB Output is correct
19 Correct 66 ms 30728 KB Output is correct
20 Correct 4 ms 21080 KB Output is correct
21 Correct 4 ms 21084 KB Output is correct
22 Correct 56 ms 25328 KB Output is correct
23 Correct 31 ms 24412 KB Output is correct
24 Correct 39 ms 25172 KB Output is correct
25 Correct 36 ms 24400 KB Output is correct

Subtask #2
51.8518518519 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 21084 KB Output is correct
2 Incorrect 4 ms 21340 KB Output isn't correct
3 Correct 39 ms 28868 KB Output is correct
4 Correct 28 ms 18268 KB Output is correct
5 Correct 28 ms 18256 KB Output is correct
6 Correct 104 ms 28752 KB Output is correct
7 Correct 4 ms 21080 KB Output is correct
8 Execution timed out 1060 ms 21084 KB Time limit exceeded
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 3 ms 14940 KB Output is correct
14 Execution timed out 1061 ms 21084 KB Time limit exceeded
15 Incorrect 4 ms 21592 KB Output isn't correct
16 Execution timed out 1064 ms 21084 KB Time limit exceeded
17 Correct 4 ms 19032 KB Output is correct
18 Correct 3 ms 14940 KB Output is correct
19 Correct 3 ms 14940 KB Output is correct
20 Correct 4 ms 15096 KB Output is correct
21 Correct 4 ms 14940 KB Output is correct
22 Execution timed out 1092 ms 21084 KB Time limit exceeded
23 Incorrect 46 ms 31432 KB Output isn't correct
24 Incorrect 57 ms 32468 KB Output isn't correct
25 Correct 38 ms 28860 KB Output is correct
26 Correct 30 ms 18260 KB Output is correct
27 Correct 29 ms 18012 KB Output is correct
28 Correct 30 ms 18516 KB Output is correct
29 Correct 91 ms 26196 KB Output is correct
30 Execution timed out 1063 ms 36048 KB Time limit exceeded
31 Incorrect 63 ms 36944 KB Output isn't correct
32 Correct 47 ms 27916 KB Output is correct
33 Correct 47 ms 30252 KB Output is correct
34 Correct 32 ms 18004 KB Output is correct
35 Correct 40 ms 18360 KB Output is correct
36 Correct 30 ms 18376 KB Output is correct
37 Correct 105 ms 28840 KB Output is correct
38 Correct 61 ms 35244 KB Output is correct
39 Incorrect 49 ms 26960 KB Output isn't correct
40 Correct 52 ms 31948 KB Output is correct
41 Correct 46 ms 34784 KB Output is correct
42 Correct 28 ms 18012 KB Output is correct
43 Correct 28 ms 18008 KB Output is correct
44 Correct 31 ms 18284 KB Output is correct
45 Correct 84 ms 27284 KB Output is correct
46 Execution timed out 1018 ms 37064 KB Time limit exceeded
47 Correct 65 ms 32208 KB Output is correct
48 Execution timed out 1061 ms 36076 KB Time limit exceeded
49 Correct 37 ms 24920 KB Output is correct
50 Correct 32 ms 18328 KB Output is correct
51 Correct 30 ms 18268 KB Output is correct
52 Correct 28 ms 18000 KB Output is correct
53 Correct 94 ms 27052 KB Output is correct
54 Incorrect 58 ms 33908 KB Output isn't correct