快读:
#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll read()
{
ll f=1,x=0;
char ss=getchar();
while(ss<'0'||ss>'9'){if(ss=='-')f=-1;ss=getchar();}
while(ss>='0'&&ss<='9'){x=x*10+ss-'0';ss=getchar();}
return x*f;
}
int main()
{
ll b;
b=read();
cout<<b<<" "<<endl;
}
快写:
#include<bits/stdc++.h>
using namespace std;
#define ll long long
inline void write(ll x)
{
if(x<0) putchar('-'),x=-x;
if(x>9) write(x/10);
putchar(x%10+'0');
}
int main()
{
ll b;
b=read();
write(b);
}
快速幂:
ll ksm(ll,a,ll b)
{
int ans=1,base=a;
while(b!=0)
{
if(b&1!=0)
{
ans*=base;
}
base*=base;
b>>=1;
}
}