#include<iostream> using namespace std; int main(){ int n,num=0; cin>>n; while(n!=0){ num=num*10+n%10; n/=10;} cout<<num; return 0; }

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 代码如下： ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

#include<bits/stdc++.h> using namespace std; int main(){ int a; cin >> a; int b = 0; while(a){ b = b * 10 + a % 10; a /= 10; } cout << b; return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ string n; cin>>n; if(n[0]=='-')cout << "-"; reverse(n.begin(),n.end()); cout << stoi(n); return 0; }

s = input() s_new="" n = len(s) for i in range(n): if s[n-i-1]=='0': if s_new!="": s_new+=s[n-i-1] else: s_new+=s[n-i-1] print(s_new)