题解

#include<iostream>
using namespace std;
int main(){
int a,b,c,o=0,k=1,l,p=0;
cin>>a>>b;
c=ab;
l=c;
while(l!=0){
l=l/10;
p++;
}
for(int i=1;i<=p-1;i++){
k=k10;
}
while(c!=0){
o=o+c%10*k;
c=c/10;
k=k/10;
}
cout<<o;
return 0;
}