oj.uz

Submission #83600

# Submission time Handle Problem Language Result Execution time Memory
83600 2018-11-09T13:05:05 Z Bodo171 Pipes (BOI13_pipes) C++14
65 / 100
 97 ms 49500 KB 
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
const int nmax=100005;
vector< pair<int,int> > v[nmax];
pair<int,int> cyc[nmax];
int rep[nmax],wh[nmax],mu[nmax],viz[nmax],ans[nmax],vreau[nmax],am[nmax];
int n,nr,m,i,j,sz,x,y,act,a,b;
void solve(int x)
{
    int nod=0;
    viz[x]=1;
    for(int i=0;i<v[x].size();i++)
        if(!viz[v[x][i].first])
    {
        nod=v[x][i].first;
        solve(nod);
        ans[v[x][i].second]=vreau[nod]-am[nod];
        am[x]+=(vreau[nod]-am[nod]);
    }
}
void dfs(int x)
{
    wh[x]=nr;rep[++nr]=x;
    for(int i=0;i<v[x].size();i++)
    {
        mu[nr]=v[x][i].second;
        if(!wh[v[x][i].first]) dfs(v[x][i].first);
        else
        {
            if(wh[v[x][i].first]<nr-1)
            {
                for(j=wh[v[x][i].first];j<=nr;j++)
                {
                    cyc[++sz]={rep[j],mu[j]};
                }
            }
        }
    }
}
void gaseste_ciclu()
{
    dfs(1);
    for(i=1;i<=sz;i++)
        viz[cyc[i].first]=1;
    if(!sz%2)
    {
        cout<<"0";
        return;
    }
    for(i=1;i<=sz;i++)
    {
        x=cyc[i].first;
        dfs(x);
        vreau[x]-=am[x];
    }
    for(i=1;i<=sz;i++)
    {
        x=cyc[i].first;
        if((i&1)) act+=vreau[x];
        else act-=vreau[x];
    }
    ans[cyc[sz].second]=act-vreau[cyc[1].first];
    cyc[0]=cyc[sz];
    for(i=1;i<=sz;i++)
    {
        ans[cyc[i].second]=vreau[cyc[i].first]-ans[cyc[i-1].second];
    }
    for(i=1;i<=m;i++)
        cout<<2*ans[i]<<'\n';
}
int main()
{
    //freopen("data.in","r",stdin);
    ios_base::sync_with_stdio(false);
    cin>>n>>m;
    if(m>n)
    {
        cout<<"0";
        return 0;
    }
    for(i=1;i<=n;i++)
    {
        cin>>vreau[i];
    }
    for(i=1;i<=m;i++)
    {
        cin>>a>>b;
        v[a].push_back({b,i});
        v[b].push_back({a,i});
    }
    if(m==n-1)
    {
        solve(1);
        if(vreau[1]-am[1])
        {
            cout<<"0";
            return 0;
        }
        for(i=1;i<=m;i++)
            cout<<2*ans[i]<<'\n';
    }
    else
    {
        gaseste_ciclu();
    }
    return 0;
}

Compilation message

pipes.cpp: In function 'void solve(int)':
pipes.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v[x].size();i++)
                 ~^~~~~~~~~~~~
pipes.cpp: In function 'void dfs(int)':
pipes.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v[x].size();i++)
                 ~^~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2680 KB Output is correct
2 Correct 4 ms 2828 KB Output is correct
3 Correct 5 ms 2904 KB Output is correct
4 Correct 82 ms 9956 KB Output is correct
5 Correct 4 ms 9956 KB Output is correct
6 Correct 4 ms 9956 KB Output is correct
7 Correct 4 ms 9956 KB Output is correct
8 Correct 6 ms 9956 KB Output is correct
9 Correct 6 ms 9956 KB Output is correct
10 Correct 5 ms 9956 KB Output is correct
11 Correct 5 ms 9956 KB Output is correct
12 Correct 5 ms 9956 KB Output is correct
13 Correct 70 ms 10020 KB Output is correct
14 Correct 72 ms 12396 KB Output is correct
15 Correct 77 ms 14260 KB Output is correct
16 Correct 85 ms 14752 KB Output is correct
17 Correct 84 ms 16868 KB Output is correct
18 Correct 80 ms 18556 KB Output is correct
19 Correct 97 ms 21792 KB Output is correct
20 Correct 4 ms 21792 KB Output is correct
21 Correct 5 ms 21792 KB Output is correct
22 Correct 71 ms 21792 KB Output is correct
23 Correct 56 ms 21792 KB Output is correct
24 Correct 84 ms 24532 KB Output is correct
25 Correct 61 ms 24796 KB Output is correct

Subtask #2
35.0 / 70.0

# Verdict Execution time Memory Grader output
1 Runtime error 9 ms 24796 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Runtime error 10 ms 24796 KB Execution killed with signal 11 (could be triggered by violating memory limits)
3 Runtime error 66 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
4 Correct 5 ms 35724 KB Output is correct
5 Correct 4 ms 35724 KB Output is correct
6 Correct 4 ms 35724 KB Output is correct
7 Runtime error 11 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
8 Runtime error 9 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
9 Runtime error 10 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
10 Correct 4 ms 35724 KB Output is correct
11 Correct 4 ms 35724 KB Output is correct
12 Correct 4 ms 35724 KB Output is correct
13 Correct 5 ms 35724 KB Output is correct
14 Runtime error 11 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
15 Runtime error 11 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
16 Runtime error 10 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
17 Runtime error 10 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
18 Correct 4 ms 35724 KB Output is correct
19 Correct 4 ms 35724 KB Output is correct
20 Correct 4 ms 35724 KB Output is correct
21 Correct 4 ms 35724 KB Output is correct
22 Runtime error 13 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
23 Runtime error 57 ms 35724 KB Execution killed with signal 11 (could be triggered by violating memory limits)
24 Runtime error 75 ms 40024 KB Execution killed with signal 11 (could be triggered by violating memory limits)
25 Runtime error 70 ms 40880 KB Execution killed with signal 11 (could be triggered by violating memory limits)
26 Correct 4 ms 40880 KB Output is correct
27 Correct 4 ms 40880 KB Output is correct
28 Correct 4 ms 40880 KB Output is correct
29 Correct 4 ms 40880 KB Output is correct
30 Runtime error 67 ms 40960 KB Execution killed with signal 11 (could be triggered by violating memory limits)
31 Runtime error 79 ms 44932 KB Execution killed with signal 11 (could be triggered by violating memory limits)
32 Runtime error 69 ms 45392 KB Execution killed with signal 11 (could be triggered by violating memory limits)
33 Runtime error 71 ms 45392 KB Execution killed with signal 11 (could be triggered by violating memory limits)
34 Correct 4 ms 45392 KB Output is correct
35 Correct 4 ms 45392 KB Output is correct
36 Correct 4 ms 45392 KB Output is correct
37 Correct 4 ms 45392 KB Output is correct
38 Runtime error 65 ms 45392 KB Execution killed with signal 11 (could be triggered by violating memory limits)
39 Runtime error 73 ms 45392 KB Execution killed with signal 11 (could be triggered by violating memory limits)
40 Runtime error 66 ms 45392 KB Execution killed with signal 11 (could be triggered by violating memory limits)
41 Runtime error 74 ms 47388 KB Execution killed with signal 11 (could be triggered by violating memory limits)
42 Correct 4 ms 47388 KB Output is correct
43 Correct 4 ms 47388 KB Output is correct
44 Correct 4 ms 47388 KB Output is correct
45 Correct 4 ms 47388 KB Output is correct
46 Runtime error 76 ms 48536 KB Execution killed with signal 11 (could be triggered by violating memory limits)
47 Runtime error 67 ms 48536 KB Execution killed with signal 11 (could be triggered by violating memory limits)
48 Runtime error 78 ms 48536 KB Execution killed with signal 11 (could be triggered by violating memory limits)
49 Runtime error 68 ms 48536 KB Execution killed with signal 11 (could be triggered by violating memory limits)
50 Correct 4 ms 48536 KB Output is correct
51 Correct 4 ms 48536 KB Output is correct
52 Correct 4 ms 48536 KB Output is correct
53 Correct 4 ms 48536 KB Output is correct
54 Runtime error 79 ms 49500 KB Execution killed with signal 11 (could be triggered by violating memory limits)