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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#328340#1844. CactuslefyWA 170ms85632kbC++142.9kb2024-02-15 19:19:422024-02-15 19:19:42

Judging History

你现在查看的是最新测评结果

  • [2024-02-15 19:19:42]
  • 评测
  • 测评结果:WA
  • 用时:170ms
  • 内存:85632kb
  • [2024-02-15 19:19:42]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int N=6e5+10;
vector<int>e[N];
void add(int u,int v){
    e[u].push_back(v);
}
vector<int>ans;
int du[N<<1],n,m,vis[N];
void solve1(){
    queue<int>q;
    for(int i=1;i<=n;i++)if(du[i]&1)q.push(i);
    while(!q.empty()){
        int x=q.front();q.pop();
        if(vis[x]||du[x]%2==0)continue;
        vis[x]=1;
        for(int v:e[x])if(!vis[v]){
            du[v]--;
            if(du[v]&1)q.push(v);
        }
        ans.push_back(x);
    }
}
int dcc,be[N],dfn[N],low[N],idd,st[N],top;
vector<int>b[N<<1],hav[N];
void Tarjan(int x){
    st[++top]=x;dfn[x]=low[x]=++idd;
    for(int v:e[x])if(!vis[v]){
        if(!dfn[v]){
            Tarjan(v);
            low[x]=min(low[x],low[v]);
            if(low[v]>=dfn[x]){
                dcc++;int y=0;
                b[dcc+n].push_back(x);b[x].push_back(dcc+n);
                du[x]++,du[dcc+n]++;hav[dcc].push_back(x);
                while(top&&st[top]!=x){
                    y=st[top--];hav[dcc].push_back(y);
                    b[y].push_back(dcc+n),b[dcc+n].push_back(y);
                    du[y]++,du[dcc+n]++;
                }
            }
        }else low[x]=min(low[x],dfn[v]);
    }
}

void solve2(){
    ans.push_back(-1);int sz=ans.size();
    for(int i=0;i<sz-1;i++)ans.push_back(ans[i]);
    memset(du,0,sizeof(du));
    for(int i=1;i<=n;i++)if(!vis[i])Tarjan(i);
    queue<int>q;for(int i=1;i<=n+dcc;i++)if(du[i]==1)q.push(i);
    int tmp=0;
    while(!q.empty()){
        int x=q.front();q.pop();
        for(int v:b[x]){
            du[v]--;
            if(du[v]==1)q.push(v);
        }
        if(x<=n)continue;x-=n;
        int sz=hav[x].size();
        tmp=hav[x][0];
        for(int i=1;i<sz;i+=2)if(sz-i==3){
            if(sz<3)cout<<"bnm";
            ans.push_back(hav[x][sz-1]);
            ans.push_back(hav[x][sz-2]+n);
            ans.push_back(hav[x][sz-3]+n);
            ans.push_back(hav[x][sz-3]);
            if(i==1)ans.push_back(hav[x][sz-2]);
            ans.push_back(hav[x][sz-1]+n);
        }else{
            if(i+1>=sz)cout<<"cnm\n";
            if(i==1)ans.push_back(hav[x][i]),ans.push_back(hav[x][i+1]+n),ans.push_back(hav[x][i+1]),ans.push_back(hav[x][i]+n);
            else ans.push_back(hav[x][i+1]),ans.push_back(hav[x][i]),ans.push_back(hav[x][i]+n),ans.push_back(hav[x][i+1]+n);
        }
    }
    ans.push_back(tmp);
}
int main() {
    scanf("%d%d",&n,&m);
    for(int i=1;i<=m;i++){
        int x,y;
        scanf("%d%d",&x,&y);
        add(x,y),add(y,x);
        du[x]++,du[y]++;
    }
    solve1();
    if(ans.size()!=n)solve2();
    printf("0 %d\n",(int)ans.size());
    for(int x:ans){
        if(n<=1000){
            if(x==-1)printf("2\n");
        else if(x<=2*n)printf("1 %d\n",x);
        }else if(x>2*n)cout<<x<<"**\n";
        
        
    }
    return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 10ms
memory: 68576kb

input:

3 3
1 2
1 3
2 3

output:

0 6
2
1 3
1 5
1 2
1 6
1 1

result:

ok You are right!

Test #2:

score: 0
Accepted
time: 8ms
memory: 68360kb

input:

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

output:

0 14
1 4
1 5
1 6
1 7
2
1 4
1 5
1 6
1 7
1 3
1 9
1 2
1 10
1 1

result:

ok You are right!

Test #3:

score: -100
Wrong Answer
time: 170ms
memory: 85632kb

input:

300000 368742
1 143504
1 234282
2 91276
2 296320
3 274816
4 212293
4 258214
5 253489
5 295826
6 96521
6 252745
6 267103
6 269879
7 5293
7 295586
8 44304
8 57067
8 233291
9 190526
10 18682
11 7440
12 24695
12 172561
12 243692
12 280316
13 80152
13 268749
14 146394
14 207280
15 151280
15 226848
16 458...

output:

cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
cnm
...

result:

wrong output format Expected integer, but "cnm" found