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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 |
---|---|---|---|---|---|---|---|---|---|
#327823 | #1844. Cactus | ExplodingKonjac | WA | 3ms | 7744kb | C++20 | 6.0kb | 2024-02-15 14:51:50 | 2024-02-15 14:51:51 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define OPENIOBUF
namespace FastIO
{
class FastIOBase
{
protected:
#ifdef OPENIOBUF
static const int BUFSIZE=1<<16;
char buf[BUFSIZE+1];
int buf_p=0;
#endif
FILE *target;
FastIOBase(FILE *f): target(f){}
~FastIOBase()=default;
public:
#ifdef OPENIOBUF
virtual void flush()=0;
#endif
};
class FastOutput final: public FastIOBase
{
public:
FastOutput(FILE *f=stdout): FastIOBase(f) {}
#ifdef OPENIOBUF
~FastOutput() { flush(); }
void flush() { fwrite(buf,1,buf_p,target),buf_p=0; }
#endif
void put(char x)
{
#ifdef OPENIOBUF
if(buf[buf_p++]=x,buf_p==BUFSIZE) flush();
#else
putc(x,target);
#endif
}
FastOutput &operator <<(char x)
{ return put(x),*this; }
FastOutput &operator <<(const char *s)
{ for(;*s;put(*(s++)));return *this; }
FastOutput &operator <<(const std::string &s)
{ return (*this)<<s.c_str(); }
template<typename T>
std::enable_if_t<std::is_integral<T>::value,FastOutput&> operator <<(T x)
{
if(x<0) return put('-'),(*this)<<(-x);
char stk[std::numeric_limits<T>::digits10+1],*top=stk;
do *(top++)=x%10+'0',x/=10; while(x);
while(top!=stk) put(*(--top));
return *this;
}
template<typename ...T>
void writesp(T &&...x)
{ std::initializer_list<int>{((*this)<<(x),put(' '),0)...}; }
template<typename ...T>
void writeln(T &&...x)
{ std::initializer_list<int>{((*this)<<(x),put('\n'),0)...}; }
template<typename Iter>
std::enable_if_t<std::is_base_of<
std::forward_iterator_tag,
typename std::iterator_traits<Iter>::iterator_category>
::value> writesp(Iter begin,Iter end)
{ while(begin!=end) (*this)<<*(begin++)<<' '; }
template<typename Iter>
std::enable_if_t<std::is_base_of<
std::forward_iterator_tag,
typename std::iterator_traits<Iter>::iterator_category>
::value> writeln(Iter begin,Iter end)
{ while(begin!=end) (*this)<<*(begin++)<<'\n'; }
}qout;
class FastInput final: public FastIOBase
{
private:
bool __eof;
public:
FastInput(FILE *f=stdin): FastIOBase(f),__eof(false)
#ifdef OPENIOBUF
{ buf_p=BUFSIZE; }
void flush() { buf[fread(buf,1,BUFSIZE,target)]=EOF,buf_p=0; }
bool eof()const { return buf[buf_p]==EOF; }
#else
{}
bool eof()const { return feof(target); }
#endif
char get()
{
if(__eof) return EOF;
#ifdef OPENIOBUF
if(buf_p==BUFSIZE) flush();
char ch=buf[buf_p++];
#else
char ch=getc(target);
#endif
return ~ch?ch:(__eof=true,EOF);
}
void unget(char c)
{
__eof=false;
#ifdef OPENIOBUF
buf[--buf_p]=c;
#else
ungetc(c,target);
#endif
}
explicit operator bool()const { return !__eof; }
FastInput &operator >>(char &x)
{ while(isspace(x=get()));return *this; }
template<typename T>
std::enable_if_t<std::is_integral<T>::value,FastInput&> operator >>(T &x)
{
char ch,sym=0;x=0;
while(isspace(ch=get()));
if(__eof) return *this;
if(ch=='-') sym=1,ch=get();
for(;isdigit(ch);x=(x<<1)+(x<<3)+(ch^48),ch=get());
return unget(ch),sym?x=-x:x,*this;
}
FastInput &operator >>(char *s)
{
while(isspace(*s=get()));
if(__eof) return *this;
for(;!isspace(*s) && !__eof;*(++s)=get());
return unget(*s),*s='\0',*this;
}
FastInput &operator >>(std::string &s)
{
char str_buf[(1<<8)+1]={0},*p=str_buf;
char *const buf_end=str_buf+(1<<8);
while(isspace(*p=get()));
if(__eof) return *this;
for(s.clear(),p++;;p=str_buf)
{
for(;p!=buf_end && !isspace(*p=get()) && !__eof;p++);
if(p!=buf_end) break;
s.append(str_buf);
}
unget(*p),*p='\0',s.append(str_buf);
return *this;
}
template<typename ...T>
void read(T &&...x)
{ std::initializer_list<int>{((*this)>>(x),0)...}; }
template<typename Iter>
std::enable_if_t<std::is_base_of<
std::forward_iterator_tag,
typename std::iterator_traits<Iter>::iterator_category>
::value> read(Iter begin,Iter end)
{ while(begin!=end) (*this)>>*(begin++); }
}qin;
} // namespace FastIO
using FastIO::qin,FastIO::qout;
using LL=long long;
using LD=long double;
using UI=unsigned int;
using ULL=unsigned long long;
#ifndef DADALZY
#define FILEIO(file) freopen(file".in","r",stdin),freopen(file".out","w",stdout)
#define LOG(...) [](auto...){}(__VA_ARGS__)
#else
#define FILEIO(file)
#define LOG(...) fprintf(stderr,__VA_ARGS__)
#endif
constexpr int MAXN=3e5;
int n,m;
vector<int> G[MAXN+5];
vector<string> ans;
inline void report1(int x) { ans.emplace_back("1 "+to_string(x)); }
inline void report2() { ans.emplace_back("2"); }
int tot,top,cnt,deg[MAXN+5],dfn[MAXN+5],low[MAXN+5],stk[MAXN+5];
bool del[MAXN+5],inq[MAXN+5],vis[MAXN+5];
vector<int> ord,p[MAXN+5];
void tarjan(int u)
{
dfn[u]=low[u]=++tot;
stk[++top]=u;
for(auto &v: G[u])
{
if(del[v]) continue;
if(!dfn[v])
{
tarjan(v);
low[u]=min(low[u],low[v]);
if(low[v]!=dfn[u]) continue;
ord.push_back(++cnt);
p[cnt].push_back(u);
deg[u]++;
for(int x=0;x!=v;top--)
{
x=stk[top];
p[cnt].push_back(x);
deg[x]++;
}
}
else low[u]=min(low[u],dfn[v]);
}
}
int main()
{
qin>>n>>m;
for(int i=1;i<=m;i++)
{
int u,v;
qin>>u>>v;
G[u].push_back(v);
G[v].push_back(u);
deg[u]++,deg[v]++;
}
queue<int> q;
for(int i=1;i<=n;i++)
if(deg[i]&1) q.push(i),inq[i]=true;
while(!q.empty())
{
int u=q.front();
if(deg[u]&1)
{
for(auto &v: G[u])
if(((--deg[v])&1) && !inq[v])
q.push(v),inq[v]=true;
del[u]=true;
report1(u);
}
q.pop(),inq[u]=false;
}
fill(deg+1,deg+n+1,0);
for(int i=1;i<=n;i++)
if(!del[i] && !dfn[i]) tarjan(i);
report2();
for(auto &id: ord)
{
auto it=find_if(p[id].begin(),p[id].end(),[](int x) {
return deg[x]>1;
});
rotate(p[id].begin(),it,p[id].end());
int sz=p[id].size();
for(int i=1;i<sz;i++)
report1(p[id][i]+((i&1)?0:n)),vis[p[id][i]]=true;
if(sz&1)
report1(p[id][1]+n),report1(p[id][sz-1]);
else
report1(p[id][1]+n),report1(p[id][sz-1]+n);
for(auto &u: p[id]) deg[u]--;
}
qout<<"0 "<<ans.size()<<'\n';
for(auto &s: ans) qout<<s<<'\n';
return 0;
}
详细
Test #1:
score: 0
Wrong Answer
time: 3ms
memory: 7744kb
input:
3 3 1 2 1 3 2 3
output:
0 5 2 1 3 1 5 1 6 1 2
result:
wrong answer The number of remaining edges is not equal to m'.