liumeihao @ 2023-10-05 19:07:22
#include<bits/stdc++.h>
using namespace std;
const int N=1e6+101;
using ll=long long;
#define int long long
signed main(){
std::ios::sync_with_stdio(0),cin.tie(0);
string s;
cin>>s;
int f=0,t;
if(s[0]=='-'){
s.erase(0,1);
f=1;
}
for(int i=0;i<s.size();i++){
if(s[i]>='1'&&s[i]<='9')
t=i;
}
for(int i=t;i<s.size();i++){
if(s[i]=='0')
s.erase(i,i+1);
}
reverse(s.begin(),s.end());
if(f)cout<<'-';
cout<<s;
return 0;
}by AceKnightPuppet @ 2023-10-11 19:52:05
#include <bits/stdc++.h>
using namespace std;
int main(){
// freopen("isbn.in", "r", stdin);
// freopen("isbn.out", "w", stdout);
int n,s;
cin>>n;
while(n) s=s*10+n%10,n/=10;
cout<<s;
//fclose(stdin);
//fclose(stdout);
return 0;
}