模板-开始
存放一些代码的缺省源，IO优化。
-尚未完工-
1、缺省源1（快速）
#include <bits/stdc++.h>
using namespace std;
//-------------define--------------
//#define int long long
typedef long long ll;
typedef unsigned long long ull;
const int INF=0x3f3f3f3f;
const ll LLINF=0x3f3f3f3f3f3f3f3f;
const int MINF=0x3f;
const int NINF=0xc0c0c0c0;
const ll LLNINF=0xc0c0c0c0c0c0c0c0;
const int MNINF=0xc0;
const double PI=acos(-1);
#define Mem0(a) memset(a,0,sizeof(a))
#define MemINF(a) memset(a,MINF,sizeof(a))
#define MemNINF(a) memset(a,MNINF,sizeof(a))
#define MemN1(a) memset(a,-1,sizeof(a))
//-------------vector--------------
typedef vector<int> vii;
typedef vector<int>::iterator vit;
//#define push_back PB
//-------------quick IO--------------
int read()
{
unsigned n=0; int f=1; char ch;
for(ch=getchar();ch<'0'||ch>'9';ch=getchar()) if(ch=='-') f=-1;
for(;'0'<=ch&&ch<='9';ch=getchar()) n=(n<<3)+(n<<1)+(ch^48);
return f*n;
}
ll readll()
{
ull n=0; ll f=1; char ch;
for(ch=getchar();ch<'0'||ch>'9';ch=getchar()) if(ch=='-') f=-1;
for(;'0'<=ch&&ch<='9';ch=getchar()) n=(n<<3)+(n<<1)+(ch^48);
return f*n;
}
//-------------start--------------
//#define DEBUG 1
const int NN=2E5; const int N=NN+5;
const int MM=1E6; const int M=MM+5;
const ll P=998244353;
//------queue------
//int q[N*2],hd=1,tl=0;
//------Graph------
//int V[N*2],H[N],K[N*2],l=1 ,E[N*2];
//inline void Add(int x,int y,int w){V[++l]=y,E[l]=w,K[l]=H[x],H[x]=l;}
//inline void add(int x,int y){Add(x,y); Add(y,x);}
//inline void add(int x,int y,int w){Add(x,y,w); Add(y,x,w);}]
//------normal------
int n,a[N];
inline int Solve()
{
#ifdef DEBUG
printf("Debuging...\n");
#endif
int a,b; cin>>a>>b;
cout<<"Hallo world!\n"<<a+b<<endl;
return 0;
}
signed main()
{
ios::sync_with_stdio(false);
cin.tie(0);
//init();
int T=1;
cin>>T;
for(;T--;)Solve();
return 0;
}
2、缺省源2（格式化）
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
//#define DEBUG 1
const int N=1E6+5;
inline void Solve()
{
#ifdef DEBUG
printf("Debuging...\n");
#endif
int a,b; cin>>a>>b;
cout<<"Hallo world!\n"<<a+b<<endl;
return ;
}
//#define FILES_IO 2
int main()
{
#ifdef FILES_IO
string FileName="test",ReadFile=FileName+".in",WriteFile=FileName+".out";
freopen(ReadFile.c_str(),"r", stdin);
freopen(WriteFile.c_str(),"w", stdout);
#endif
//srand((unsigned)time(0));
//ios::sync_with_stdio(false);
//cin.tie(0);
int T=1;
//scanf("%d",&T);
for(;T--;)
Solve();
#ifdef FILES_IO
fclose(stdin);
fclose(stdout);
#endif
return 0;
}
3、快读快输
（1）getchar/putchar版
//int 快读
int read()
{
unsigned n=0; int f=1; char ch;
for(ch=getchar();ch<'0'||ch>'9';ch=getchar()) if(ch=='-') f=-1;
for(;'0'<=ch&&ch<='9';ch=getchar()) n=(n<<3)+(n<<1)+(ch^48);
return f*n;
}
//long long 快读
ll read()
{
ull n=0; ll f=1; char ch;
for(ch=getchar();ch<'0'||ch>'9';ch=getchar()) if(ch=='-') f=-1;
for(;'0'<=ch&&ch<='9';ch=getchar()) n=(n<<3)+(n<<1)+(ch^48);
return f*n;
}
//特定char 快读
char readch()
{
char ch;
for(ch=getchar();'A'>ch || ch>'Z';ch=getchar());
return ch;
}
//ull 快输
void Write(ull x)
{
if(x==0) return;
Write(x/10); putchar(x%10+'0');
}
//int 快输
void write_(int x)
{
if(x==0)return;
write_(x/10);putchar(x%10+'0');
}
void write(int x)
{
if(x==0){putchar('0');return;}
if(x<0) putchar('-'),x=-x;
write_(x);
}
//int128 输入输出
typedef __int128 lll;
lll readl()
{
lll n=0; lll f=1; char ch;
for(ch=getchar();ch<'0'||ch>'9';ch=getchar()) if(ch=='-') f=-1;
for(;'0'<=ch&&ch<='9';ch=getchar()) n=(n<<3)+(n<<1)+(ch^48);
return f*n;
}
void writel_(lll x)
{
if(x==0) return;
writel_(x/10); putchar(x%10+'0');
}
void writel(lll x)
{
if(x==0){putchar('0');return;}
if(x<0) putchar('-'),x=-x;
writel_(x);
putchar('\n');
}
（2）fread/fwrite版
4、常用宏定义与常数
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
/*
#define INF 0x3f3f3f3f
#define LLINF 0x3f3f3f3f3f3f3f3f
#define MINF 0x3f
*/
const int INF=0x3f3f3f3f;
const ll LLINF=0x3f3f3f3f3f3f3f3f;
const int MINF=0x3f;
#define Mem0(a) memset(a,0,sizeof(a))
#define MemINF(a) memset(a,MINF,sizeof(a))
const double PI=acos(-1);
5、火车头
#pragma GCC optimize(2)
#pragma GCC optimize(3)
#pragma GCC target("avx,sse2,sse3,sse4,mmx")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fcse-follow-jumps")，，
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")
浙公网安备 33010602011771号