oj.uz

Submission #642689

# Submission time Handle Problem Language Result Execution time Memory
642689 2022-09-20T11:28:25 Z berr Graph (BOI20_graph) C++17
0 / 100
 4 ms 5072 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
int c[(int)1e5+5], val[(int)1e5+5], vis[(int)(1e5+5)], val2[(int)(1e5)+5];
vector<array<int, 2>> adj[(int)(1e5+5)];
vector<int> pos[(int)(1e5+5)], aaa;
int flag=1;

void dfs(int x, int y, int z)
{

    vis[x]=z;
    pos[z].push_back(x);
    for(auto i: adj[x])
    {
        if(i[0]==y) continue;
        if(vis[i[0]]!=0)
        {
            if(c[x]+c[i[0]]==0&&val[i[0]]+val[x]!=i[1])
            {
                flag=0;
            }
            else if(c[x]+c[i[0]]!=0)
            {
                if(val2[z]==-1)
                {
                    val2[z]=(i[1]-val[i[0]]-val[x])/(c[x]+c[i[0]]);
                }
                else
                {
                    if(val2[z]!=(i[1]-val[i[0]]-val[x])/(c[x]+c[i[0]])) flag=0;
                }
            }
        }
        else
        {
            val[i[0]]=i[1]-val[x];
            c[i[0]]=-1*c[x];

            dfs(i[0], x, z);
        }
    }
}


void dfs2(int z, int p)
{
    vis[z]=1;
    for(auto i: adj[z])
    {
        if(val[i[0]]+val[z]!=i[1]) flag=0;
        else if(!vis[i[0]]) dfs2(i[0], z);
    }
}

int32_t main()
{
    ios_base::sync_with_stdio(false); cin.tie(0);
    
    int n, m; cin>>n>>m;


    for(int i=0; i<m; i++)
    {
        int x, y, z; cin>>x>>y>>z;

        z*=1e7;
        adj[x].push_back({y, z});
        adj[y].push_back({x, z});
    }

    for(int i=1; i<=n; i++)
    {
        val2[i]=-1;
    }

    for(int i=1; i<=n; i++)
    {
        if(!vis[i])  c[i]=1,dfs(i, i, i), aaa.push_back(i);
    }


    for(auto z: aaa)
    {
        if(val2[z]!=-1)
        {
            for(auto i: pos[z])
            {
                val[i]+=c[i]*val2[z];
            }
        }
        else
        {
            int s=-1e10;
            for(int i=40; i>=0; i--)
            {
                int tmp=s+(1LL<<i);
         
                int ans1=0,  ans2=0;

                int tmp2=tmp-1;

                for(auto j: pos[z])
                {
                    ans1+=abs(val[j]+(c[j]*tmp));
                    ans2+=abs(val[j]+(c[j]*tmp2));
                }

                if(ans1<ans2) s=tmp; 
            }


            val2[z]=s;
            for(auto i: pos[z])
            {
                val[i]+=c[i]*val2[z];
            }
        }
    }

    for(int i=1; i<=n; i++)
    {
        vis[i]=0;
        if(!vis[i])  dfs2(i, i);

    }
    if(flag)
    {

        cout<<"YES\n";
        for(int i=1; i<=n; i++)
        {
            float x=(float)val[i]/(float)10000000;
            cout<<fixed<<x<<" ";
        }
    }
    else
    {
        cout<<"NO\n";
    }
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB answer = YES
2 Correct 2 ms 4948 KB answer = YES
3 Correct 3 ms 4948 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 5072 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 2 ms 4948 KB answer = YES
9 Correct 3 ms 4948 KB answer = NO
10 Correct 3 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 4948 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 4948 KB answer = YES
16 Correct 3 ms 4948 KB answer = YES
17 Correct 2 ms 4948 KB answer = YES
18 Incorrect 2 ms 4948 KB jury has the better answer: jans = YES, pans = NO
19 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB answer = YES
2 Correct 2 ms 4948 KB answer = YES
3 Correct 3 ms 4948 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 5072 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 2 ms 4948 KB answer = YES
9 Correct 3 ms 4948 KB answer = NO
10 Correct 3 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 4948 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 4948 KB answer = YES
16 Correct 3 ms 4948 KB answer = YES
17 Correct 2 ms 4948 KB answer = YES
18 Incorrect 2 ms 4948 KB jury has the better answer: jans = YES, pans = NO
19 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB answer = YES
2 Correct 2 ms 4948 KB answer = YES
3 Correct 3 ms 4948 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 5072 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 2 ms 4948 KB answer = YES
9 Correct 3 ms 4948 KB answer = NO
10 Correct 3 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 4948 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 4948 KB answer = YES
16 Correct 3 ms 4948 KB answer = YES
17 Correct 2 ms 4948 KB answer = YES
18 Incorrect 2 ms 4948 KB jury has the better answer: jans = YES, pans = NO
19 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB answer = YES
2 Correct 2 ms 4948 KB answer = YES
3 Correct 3 ms 4948 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 5072 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 2 ms 4948 KB answer = YES
9 Correct 3 ms 4948 KB answer = NO
10 Correct 3 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 4948 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 4948 KB answer = YES
16 Correct 3 ms 4948 KB answer = YES
17 Correct 2 ms 4948 KB answer = YES
18 Incorrect 2 ms 4948 KB jury has the better answer: jans = YES, pans = NO
19 Halted 0 ms 0 KB -

Subtask #5
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB answer = YES
2 Correct 2 ms 4948 KB answer = YES
3 Correct 3 ms 4948 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 5072 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 2 ms 4948 KB answer = YES
9 Correct 3 ms 4948 KB answer = NO
10 Correct 3 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 4948 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 4948 KB answer = YES
16 Correct 3 ms 4948 KB answer = YES
17 Correct 2 ms 4948 KB answer = YES
18 Incorrect 2 ms 4948 KB jury has the better answer: jans = YES, pans = NO
19 Halted 0 ms 0 KB -