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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#485367#8593. Coinshenfe13 2ms9952kbC++232.2kb2024-07-20 17:10:052024-07-20 17:10:06

Judging History

你现在查看的是最新测评结果

  • [2024-07-20 17:10:06]
  • 评测
  • 测评结果:3
  • 用时:2ms
  • 内存:9952kb
  • [2024-07-20 17:10:05]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define int ll
#define pii pair<int,int>
#define F first
#define S second
#define pb push_back
#define all(v) v.begin(),v.end()
#define mem(a,i) memset(a,i,sizeof(a))
#define in insert
#define sz(s) (int)s.size()

const int MAX=5e5+10;

int n,m;
vector<int> g[MAX],g1[MAX];
int use[MAX];
int ind[MAX],outd[MAX];
int ans[MAX];
bool was1[MAX],was2[MAX];

struct DSU{
    int f[MAX];

    void init(int n){
        for(int i=1;i<=n;i++)f[i]=i;
    }

    int get(int v){
        return (f[v]==v?v:f[v]=get(f[v]));
    }

    void unite(int u,int v){
        u=get(u);
        v=get(v);
        f[u]=v;
    }
}D;

void solve(){
    cin>>n>>m;
    D.init(n);
    int cnt=1;
    multiset<int> st;
    for(int i=1;i<=m;i++){
        int a,b;
        cin>>a>>b;
        g[a].pb(b);
        g1[b].pb(a);
        if(D.get(a)!=D.get(b)){
            D.unite(a,b);
            cnt++;
        }
        ind[b]++;
        outd[a]++;
    }
    if(cnt<n){
        for(int i=1;i<=n;i++)cout<<-1<<" ";
        return;
    }
    for(int i=1;i<=n;i++){
        if(ind[i]==0)st.in(i);
    }
    while(!st.empty()){
        if(sz(st)==1){
            // cout<<*st.begin()<<"\n";
            ans[*st.begin()]++;
        }
        multiset<int> nw;
        for(auto v:st){
            for(auto to:g[v]){
                ind[to]--;
                if(ind[to]==0)nw.in(to);
            }
        }
        swap(nw,st);
    }
    st.clear();

    for(int i=1;i<=n;i++){
        if(outd[i]==0)st.in(i);
    }
    while(!st.empty()){
        if(sz(st)==1){
            // cout<<*st.begin()<<"\n";
            ans[*st.begin()]++;
        }
        multiset<int> nw;
        for(auto v:st){
            for(auto to:g1[v]){
                outd[to]--;
                if(outd[to]==0)nw.in(to);
            }
        }
        swap(nw,st);
    }
    st.clear();
    for(int i=1;i<=n;i++){
        if(ans[i]>1)cout<<1<<" ";
        else cout<<-1<<" ";
    }
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t=1;
    // cin>>t;
    while(t--)solve();
}

详细

Subtask #1:

score: 3
Acceptable Answer

Test #1:

score: 3
Acceptable Answer
time: 0ms
memory: 9952kb

input:

4 4
2 4
3 1
4 1
2 3

output:

1 1 -1 -1 

result:

points 0.50 -1 correct

Test #2:

score: 3
Acceptable Answer
time: 2ms
memory: 9820kb

input:

6 8
1 5
5 4
6 2
2 5
4 3
6 1
6 5
2 1

output:

1 1 1 1 1 1 

result:

points 0.50 -1 correct

Test #3:

score: 6
Accepted
time: 0ms
memory: 9732kb

input:

2 1
1 2

output:

1 1 

result:

ok ac

Test #4:

score: 3
Acceptable Answer
time: 0ms
memory: 9784kb

input:

6 12
1 5
5 4
6 2
2 5
4 3
6 5
1 5
1 5
2 4
6 3
1 3
4 3

output:

-1 -1 1 1 1 -1 

result:

points 0.50 -1 correct

Test #5:

score: 3
Acceptable Answer
time: 2ms
memory: 9724kb

input:

7 20
1 6
6 3
1 4
1 5
1 7
1 2
1 5
2 3
4 5
7 2
2 4
5 3
6 3
1 3
4 3
7 5
2 6
4 6
7 2
7 5

output:

1 1 1 1 -1 -1 1 

result:

points 0.50 -1 correct

Test #6:

score: 3
Acceptable Answer
time: 0ms
memory: 9952kb

input:

7 20
5 6
1 3
3 6
4 1
7 4
2 5
4 3
2 6
7 5
4 6
2 6
2 1
4 5
1 3
1 5
7 1
7 6
4 1
7 6
3 6

output:

1 -1 -1 -1 -1 1 -1 

result:

points 0.50 -1 correct

Test #7:

score: 3
Acceptable Answer
time: 2ms
memory: 9752kb

input:

7 20
7 6
4 5
6 4
3 6
4 1
6 2
3 5
5 2
7 6
1 2
3 6
6 4
7 1
6 1
7 1
4 5
3 6
3 5
4 5
3 1

output:

-1 1 -1 1 -1 1 -1 

result:

points 0.50 -1 correct

Subtask #2:

score: 0
Wrong Answer

Dependency #1:

50%
Acceptable Answer

Test #8:

score: 0
Wrong Answer
time: 0ms
memory: 9760kb

input:

20 100
5 20
4 5
18 16
1 13
14 9
11 19
6 4
7 20
16 11
8 13
4 5
16 9
12 14
7 12
11 3
9 11
9 11
13 6
3 10
12 9
13 4
20 12
13 6
18 11
5 7
5 7
15 18
12 15
17 13
15 18
3 2
11 2
11 2
15 19
4 19
14 19
14 9
17 3
1 18
8 10
16 19
1 6
7 2
5 12
1 18
8 20
5 18
8 5
4 16
1 15
5 19
18 19
17 10
1 10
17 3
10 2
3 10
17...

output:

-1 -1 -1 1 1 1 1 -1 1 1 1 1 1 -1 1 -1 -1 -1 -1 1 

result:

wrong answer wa

Subtask #3:

score: 0
Skipped

Dependency #1:

50%
Acceptable Answer

Dependency #2:

0%

Subtask #4:

score: 0
Skipped

Dependency #1:

50%
Acceptable Answer

Dependency #2:

0%