头文件板子

包含各种输入输出的缩写,适合偷懒型选手使用
就是会把代码弄的很长，看起来极丑

#include<bits/stdc++.h>
using namespace std;
#define fin freopen("in.txt", "r", stdin)
#define fout freopen("out.txt", "w", stdout)
#define rep(i,a,n) for(int i=a;i<n;i++)
#define dow(i,a,n) for(int i=n;i>=a;i--)
#define sca(x) scanf("%d",&x)
#define sca2(x,y) scanf("%d%d",&x,&y)
#define sca3(x,y,z) scanf("%d%d%d",&x,&y,&z)
#define scl(x) scanf("%lld",&x)
#define scl2(x,y) scanf("%lld%lld",&x,&y)
#define scl3(x,y,z) scanf("%lld%lld%lld",&x,&y,&z)
#define scd(x) scanf("%lf",&x)
#define scd2(x,y) scanf("%lf%lf",&x,&y)
#define scd3(x,y,z) scanf("%lf%lf%lf",&x,&y,&z)
#define scc(x) scanf("%c",&x)
#define scs(x) scanf("%s",x)
#define pri(x) printf("%d
",x)
#define pri2(x,y) printf("%d %d
",x,y)
#define pri3(x,y,z) printf("%d %d %d
",x,y,z)
#define prl(x) printf("%lld
",x)
#define prl2(x,y) printf("%lld %lld
",x,y)
#define prl3(x,y,z) printf("%lld %lld %lld
",x,y,z)
#define prc(x) printf("%c",x)
#define prd(x) printf("%lf
",x)
#define prt(x) printf("%s",(x))
#define prs(x) printf("%s
",(x))
#define ll long long
#define LL long long
#define ULL unsigned long long
#define pb push_back
#define mp make_pair
#define PII pair<int,int>
#define PLL pair<ll,ll>
#define PDD pair<double,double>
inline ll read(){ll x=0,f=1;char ch=getchar();
  while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
  while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
  return x*f;}
#define read read()
template<class T> inline T gcd(T x,T y) {return y?gcd(y,x%y):x;}
template<class T> inline T lcm(T x,T y) {return x/gcd(x,y)*y;}
#define pi acos(1.0)
#define eps 1e-6
#define inf 1e17
#define INF 0x3f3f3f3f
#define N 205
const int maxn = 1e5+10;