My std
Posted zhang-sheng-hao
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了My std相关的知识,希望对你有一定的参考价值。
update on 2020 02 14
code
#include<bits/stdc++.h>
namespace IO
{
using namespace std;
char buf[1<<22],Out[1<<22],*p1=buf,*p2=buf;
int p3=-1,f=0;
inline void file()
{
#ifdef NTFOrz
freopen("file.in","r",stdin);
#endif
}
inline char getchar()
{
return (p1==p2)&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++;
}
inline void flush(){fwrite(Out,1,p3+1,stdout),p3=-1;}
inline void check(){if (p3>(1<<21)) flush();}
inline void putchar(char a){Out[++p3]=a;check();}
inline void putline(string s)
{
int tmp=p3;
while (p3-tmp<s.size()) putchar(s[p3-tmp]);
putchar(‘
‘);
}
}
namespace my_std
{
using namespace std;
#define getchar IO::getchar
#define putchar IO::putchar
#define Re register
#define rep(i,a,b) for (Re int i=(a);i<=(b);i++)
#define drep(i,a,b) for (Re int i=(a);i>=(b);i--)
#define repv(i,v) if (v.size()) rep(i,0,v.size()-1)
#define drepv(i,v) if (v.size()) drep(i,v.size()-1,0)
#define go(u) for (Re int i=head[(u)];i;i=e[i].nxt)
#define pf printf
#define writesp(x) write(x),putchar(‘ ‘),IO::check()
#define writeln(x) write(x),putchar(‘
‘),IO::check()
#define mem(x,v) memset(x,v,sizeof(x))
#define pb push_back
#define NTF return
#define AKIOI 0
typedef long long ll;
const int INF=0x7fffffff;
inline int read()
{
int sum=0,f=0;
char c=getchar();
while (!isdigit(c))
{
f|=(c==‘-‘);
c=getchar();
}
while (isdigit(c))
{
sum=(sum<<1)+(sum<<3)+(c^48);
c=getchar();
}
return f?-sum:sum;
}
void write(int k)
{
if (k<0) putchar(‘-‘),k=-k;
if (k>=10) write(k/10);
putchar(k%10+48);
}
#define templ template<typename T>
templ inline void chkmax(T &x,T y){if (x<y) x=y;}
templ inline void chkmin(T &x,T y){if (x>y) x=y;}
}
using namespace my_std;
update on 2020 06 26
code
#include<bits/stdc++.h>
#define Re register
#define rep(i,a,b) for (Re int i=(a);i<=(b);i++)
#define drep(i,a,b) for (Re int i=(a);i>=(b);i--)
using namespace std;
typedef long long ll;
inline void setfile()
{
#ifdef stO_PBNTF_Orz
freopen("file.in","r",stdin);
#endif
}
struct istream
{
char buf[1<<22],*p1=buf,*p2=buf;
inline char getchar() {return (p1==p2)&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++;}
template <typename T> inline void read(T &x)
{
x=0;int f=0;char c=getchar();
while (!isdigit(c)) f|=(c==‘-‘),c=getchar();
while (isdigit(c)) x=(x<<1)+(x<<3)+(c^48),c=getchar();
x=f?-x:x;
}
inline bool useless(char c) {return !c||c==‘ ‘||c==‘
‘;}
istream& operator >> (char &c) {while (useless(c)) c=getchar();return *this;}
istream& operator >> (char *ch)
{
int cnt=-1;char c=getchar();
while (useless(c)) c=getchar();
while (!useless(c)) ch[++cnt]=c,c=getchar();
return *this;
}
istream& operator >> (int &x) {read(x);return *this;}
istream& operator >> (ll &x) {read(x);return *this;}
}in;
struct ostream
{
char buf[1<<22],stk[1<<10];int p=-1;
inline void flush() {fwrite(buf,1,p+1,stdout),p=-1;}
~ostream() {flush();}
inline void putchar(char c) {buf[++p]=c;}
template <typename T> inline void write(T x)
{
static int top=0;
if (x<0) putchar(‘-‘),x=-x;
while (stk[++top]=x%10+‘0‘,x>=10) x/=10;
while (top) putchar(stk[top--]);
if (p>(1<<21)) flush();
}
ostream& operator << (char c) {putchar(c);return *this;}
ostream& operator << (char *c) {rep(i,0,(int)(strlen(c))-1) putchar(c[i]);return *this;}
ostream& operator << (string s) {rep(i,0,(int)(s.size())-1) putchar(s[i]);return *this;}
ostream& operator << (int x) {write(x);return *this;}
ostream& operator << (ll x) {write(x);return *this;}
}out;
未完待续
以上是关于My std的主要内容,如果未能解决你的问题,请参考以下文章
为什么std :: foreach不能用于std :: vector ? [重复]