便捷的缺省源

#include<bits/stdc++.h>
using namespace std;
#define ll long long 
#define ld long double 
#define gtc() getchar()
#define fp(i,l,r) for(int i=l;i<=r;i++)
#define fb(i,l,r) for(int i=l;i>=r;i--)
#define pil pair<int,long long>
#define pii pair<int,int>
template <class T>
inline void read(T &s){
    T neg=1,ch=gtc();s=0;
    while(!isdigit(ch)){if(ch=='-')neg=-1;ch=gtc();}
    while(isdigit(ch)){s=(s<<3)+(s<<1)+(ch-'0');ch=gtc();}
    s=s*neg;
}
const ll N=100050;
ll t,n,m;
int main(){
    /*freopen(,,stdin);
    freopen(,,stdout);*/
    
    return 0;
}