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#2
rjsp2022-02-25 11:12
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#include<stdio.h>
int fun(int s1,int s2){
if(s2<10)
return(s1*10+s2%10);
s1=s1*10+s2%10;
s1=fun(s1,s2/10);
return s1;
}
int main(){
printf("%d",fun(0,1234));
}