# include <stdio.h>
void myStrcat(char s[], char t[]){
int i,j;
for( i=0; s[i]!='\0'; i++);
for( j=0; t[j]!='\0'; j++){
s[i+j]=t[j];
}
s[i+j]='\0';
}
int main(){
char s[100];
char t[100];
myStrcat(s,t);
return 0;
}
IyBpbmNsdWRlIDxzdGRpby5oPgoKdm9pZCBteVN0cmNhdChjaGFyIHNbXSwgY2hhciB0W10pewoJaW50IGksajsKCWZvciggaT0wOyBzW2ldIT0nXDAnOyBpKyspOwoJZm9yKCBqPTA7IHRbal0hPSdcMCc7IGorKyl7CgkJc1tpK2pdPXRbal07Cgl9CglzW2kral09J1wwJzsKfQoKaW50IG1haW4oKXsKICAgIGNoYXIgc1sxMDBdOwogICAgY2hhciB0WzEwMF07CiAgICBzY2FuZigiJXMgJXMiLHMsdCk7CiAgICBwcmludGYoIiVzICsgJXMiLHMsdCk7CiAgICBteVN0cmNhdChzLHQpOwogICAgcHJpbnRmKCIgLT4gJXNcbiIscyk7CiAgICByZXR1cm4gMDsKfQo=