代码
#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<algorithm>
#include<cctype>
#include<cmath>
#include<cstdlib>
#include<queue>
#include<ctime>
#include<vector>
#include<set>
#include<map>
#include<stack>
using namespace std;
void read(int &x){
int f=1;x=0;
char s=getchar();
while(s<‘0‘||s>‘9‘){if(s==‘-‘)f=-1;s=getchar();}
while(s>=‘0‘&&s<=‘9‘){x=x*10+(s-‘0‘);s=getchar();}
x*=f;
}
void print(int x){
if(x<0){putchar(‘-‘);x=-x;}
if(x>9)print(x/10);
putchar(x%10+‘0‘);
}
int main()
{ int n;
read(n);
print(n);
return 0;
}